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New Product
Liquid Leakage Sensor Amplifiers
K7L Series
Reliable Sensitive Liquid Sensors
for Stable Detection of Liquid
Chemicals with Low Conductivity
and Water Leakage
• New models available that are compatible with PushIn Plus Terminal Block Sockets.
• UL listed when used with Push-In Plus Terminal
Block Sockets.
• Sensor disconnection detection (K7L-AT50D@/
-UD@).
• Models for long-distance wiring to 400 m.
• Ribbon Electrode Bands and Point Sensors available.
K7L-AT50@
K7L-U@
K7L-@@B
For the most recent information on models that have been
certified for safety standards, refer to your OMRON website.
Model Number Legend
K7L-@@@@ @ @
(1)
(2) (3)
(1)
(2)
Symbol
AT50
U
Meaning
Standard wiring distance
Blank
Long wiring distance
Wiring distance
(3)
Symbol
D
Disconnection
detection
Not supported.
Standard usage
• Wiring cable: 50 m max.
• Sensing Bands: 10 m max.
Supported.
Not supported.
Long distance use
• Total Length of Wiring Cable and
Sensing Bands: 400 m max.
Supported.
Meaning
No sensor disconnection
detection
Sensor disconnection
detection
Socket terminals (*1)
Symbol
Meaning
Blank
For Screw Terminal Block Socket
B
For Push-In Plus Terminal Block
Socket
Standards
Model
Screw Terminal Block
P2RF-08/-08-E
Push-In Plus Terminal Block
P2RF-08-PU
K7L-AT50
(*2)
Screw Terminal Block
P2RF-08/-08-E
Push-In Plus Terminal Block
P2RF-08-PU
K7L-AT50D
(*2)
Screw Terminal Block
P2RF-08/-08-E
Push-In Plus Terminal Block
P2RF-08-PU
K7L-AT50DB
K7L-U
(*2)
Screw Terminal Block
P2RF-08/-08-E
Push-In Plus Terminal Block
P2RF-08-PU
K7L-AT50B
K7L-UB
K7L-UD
(*2)
K7L-UDB
*1. The applicable models of the K7L depend on the model of the Socket. If the correct Socket is not used, the K7L nameplate will be upside down.
*2. The UL listing applies only when the Sensor is used in combination with a Push-In Socket (P2RF-08-PU). By itself, the K7L is UL recognized.
1
Liquid Leakage Sensor Amplifier/Liquid Leakage Sensor Amplifier with Disconnection Detection Function
K7L-AT50@/AT50D@
Reliable Detection of a Wide
Variety of Liquids Ranging from
Water to Liquid Chemicals with
Low Conductivity. Four Sensing
Ranges Available.
• New models available that are compatible with PushIn Plus Terminal Block Sockets.
• UL listed when used with Push-In Plus Terminal Block
Sockets. *1
*1. The UL listing applies only when the Sensor is used in
• Provides stable detection of liquids with impedance as
combination with a Push-In Plus Terminal Block Socket
high as 50 MΩ using inter-electrode resistance detection.
(P2RF-08-PU).
Detection of IPA and pure water possible.
By itself, the K7L is UL recognized.
*2. For the K7L-AT50D.
• Higher noise immunity with a noise canceller circuit
*3. UL/CSA
UL 508
connected to a 3-conductor cable.
CAN/CSA
C22.2 No.14
• Prevents electrode corrosion with an AC detection method.
CE:
EMI EN 55011
EMS EN 61000-6-2
• The power supply circuit and detection circuit are
isolated, allowing several Amplifiers to be installed in the
same place.
• After a disconnection is detected, operating status is held to eliminate instability due to contact of the disconnected part. *2
• Series includes an Explosion-proof Barrier (Sold Separately) to enable usage in hazard atmospheres.
• CE Marking and UL/CSA certification. *3
Refer to Safety Precautions on page 10.
Features
Sensing Bands boast high degree of chemical resistance. The K7L can be used in a wide range of applications, from semiconductor
production installations to food-processing equipment.
Inter-electrode Resistance Detection
Noise Canceller Function (Patent Pending)
Stable detection of liquids with impedances of up to 50 MΩ and common
water. Four sensing ranges are available, ensuring detection suited to the
application.
The K7L incorporates a noise canceller circuit that uses a 3-conductor
cable, ensuring a high level of noise immunity.
Fresh water, pure water, distilled water,
plating liquids, chemical liquids,
IPA (isopropyl alcohol)
AC Detection Method
The K7L internally oscillates AC signals provided to the Sensing
Band, protecting the Sensing Band from electric corrosion and
ensuring safe operation.
Oscillator
Detector
Current
2
Connecting cable
K7L-AT50@/AT50D@
Multi-channel Applications
Isolation between the power supply circuits and sensing circuits
allows multiple channels to be installed in the same location.
Detection of Condensation and Liquid
Leakage at Semiconductor Production
Installations
Detection is also possible for condensation inside cleaning devices
and liquid leaked to the surroundings.
Sensing Band with Excellent Chemical
Resistance
SUS316 and polyethylene are used for the Sensing Band's core and
sheath to ensure high resistance to both acidic and alkaline liquids.
Detection of Liquid Leakage at Pipe Joints
for Liquid Chemical Tanks
Liquid leakage at a pipe joint can be detected by wrapping the
Sensing Band around the joint.
Liquid Leakage Detection for Measuring
Baths in CMP Devices
Liquid leaked to drain pans can be detected to prevent damage to
devices and cleaning irregularities for wafers.
Detection of Cleaning Fluid Level for Plating
Devices
The level of pure water is detected inside plating baths. High
sensitivity allows high-accuracy control to prevent cleaning
irregularities.
Note: Be sure to ground the baths if two or more K7L Sensors are
used in the same tank in an explosion-prevention area.
Model Number Legend
K7L-AT50 @ @
(1) (2)
(1)
(2)
Symbol
Blank
D
Meaning
No sensor disconnection detection
Sensor disconnection detection
Symbol
Blank
B
Meaning
Ivory, Screw Terminal Block Socket
Black, Push-In Plus Terminal Block Socket
Note: If you want a Push-In Plus Terminal Block Socket, use the [email protected]
(The terminal arrangement of a Push-In Plus Terminal Block Socket is upside
down in comparison with a Screw Terminal Block Socket.)
3
K7L-AT50@/AT50D@
Ordering Information
Product name
Model
K7L-AT50
Liquid Leakage Sensor Amplifier *1
Amplifier
K7L-AT50B
K7L-AT50D
Liquid Leakage Sensor Amplifier
with Disconnection Detection Function *1
K7L-AT50DB
F03-15
F03-16PE
Sensing Band
F03-16PT
Sensors
F03-16SF
F03-16SFC
F03-16PS
Point Sensor
(for K7L-AT50/AT50B)
F03-16PS-F
F03-25
F03-26PES
Sensing Band Stickers
Mounting Brackets and Stickers
F03-26PEN
F03-26PTN
Socket *2 (for K7L-AT50/AT50D)
Socket *2 (for K7L-AT50B/AT50DB)
Point Sensor Mounting Brackets
F03-26PS
Round terminals can be used.
P2RF-08
Round terminals cannot be used.
P2RF-08-E
Push-In Plus Terminal
P2RF-08-PU
Terminal Blocks
F03-20
*1. Accessories are provided. Check the accessories listed in the specifications for details.
*2. The applicable models of the K7L depend on the model of the Socket. If the correct Socket is not used, the K7L nameplate will be upside down.
Characteristics
Ambient temperature
Operating: –10 to +55°C
Ambient humidity
Operating: 45% to 85%
Insulation resistance
10 MΩ at 100 VDC between case and current-carrying parts
Dielectric strength
1,000 VAC at 50/60 Hz for 1 min between case and current-carrying parts
Power consumption
1 W max.
Response time
Operate: 800 ms max.
Release: 800 ms max.
When turning ON power: 2 s max.
Weight
Approx. 14 g
Specifications
Rated power supply voltage
12 to 24 VDC (Allowable voltage fluctuation range: 10 to 30 VDC)
0 Ω to 50 MΩ, variable
Range 0: 0 to 250 kΩ.
Range 2: 0 to 5 kΩ.
Operate resistance
Range 1: 0 to 600 kΩ
Range 3: 0 to 50 kΩ
Note: The range is set using the DIP switch on the side of the Sensor Amplifier. (Refer to DIP Switch Settings.)
Set the corresponding pin of the DIP switch in the up position. (For range 0, set all 3 pins in the down
position.) The adjuster (ADJUST) on the top of the Sensor Amplifier sets the resistance value for detection
within the set range. It is factory-set to the upper limit. (Normally, the K7L can be used with the adjuster
at this setting.) With any range, resistance values can be set from 0 Ω.
Disconnection detection function
*
Detection signal: 10 VDC max., 200 ms
Detection time: 10 s max.
Recovery:
Operation is recovered by resetting the power supply.
Release resistance
105% min. of operate resistance
NPN open-collector transistor output with 100 mA at 30 VDC max. for both liquid leakage detection and disconnection detection.
Max. 30 VDC, 100mA
Output configuration
Note: If the rightmost pin of the DIP switch on the side of the Sensor Amplifier is set to the down position, the
output turns ON when liquid is detected; if it is set to the up position, the output turns OFF when liquid is
detected.
Connecting cable:
50 m max.
Sensing Band length: 10 m max.
Wiring distance
Accessories
* For the K7L-AT50D.
4
Note: These values are possible on condition that a completely insulated 3-conductor VCT cable with a thickness of 0.75
mm2 and a dielectric strength of 600 V is used together with a Liquid Sensing Band specified by OMRON. (A 0.2-mm2
cable can also be used.)
Terminal Block
Screwdriver for ADJUST
Terminator
K7L-AT50/AT50B
1
1
---
K7L-AT50D/AT50DB
1
1
1
K7L-AT50D-S
1
1
---
K7L-AT50@/AT50D@
Nomenclature and DIP Switch Settings
K7L-AT50/AT50D
PW
OMRON Corporation
K7L-AT50
SENSOR
RANGE MODE
Power indicator (green)
(Lit when power is supplied.)
LIQUID LEAKAGE
SENSOR
Output indicator (red)
(Lit when output is ON.)
MODE(OUTPUT)
NC
NO
Resistance adjuster
OUT
SENSOR RANGE
ADJUST
K7L-AT50B/AT50DB
Output indicator (red)
(Lit when output is ON.)
Resistance
adjuster
Power indicator (green)
(Lit when power is supplied.)
Setting Sensing Range
DIP switch
Range number
Sensing range
DIP switch
Output mode
Range 0
0 to 250 kΩ
Output OFF when liquid leakage/
Disconnection* detected
Range 1
0 to 600 kΩ
Output ON when liquid leakage/
Disconnection* detected
Range 2
0 to 5 MΩ
Range 3
0 to 50 MΩ
* Disconnection detection is supported only by the K7L-AT50D/
AT50DB.
Countermeasures Against Noise
Noise Canceller Function for Highly Sensitive Impedance
Detection
Connected with 3-conductor Cable that Offsets Inductive
Noise (Patent Pending)
The K7L Liquid Leakage Sensor Amplifier detects liquids with
impedance as high as 50 MΩ and connects to the Sensing Band
through a cable that can be extended up to 50 meters.
Countermeasures against external noise are especially important for
the Sensing Band and connecting cable because they pick up
external noise like an antenna. The K7L incorporates the noise
canceller function described below.
A VCT cable with three conductors (lines) is used. Line 1 is connected
to the Sensing Band and line 2 is left open. Lines 1 and 2 are almost
in the same position and thus will experience the same noise level.
The K7L obtains the difference between these signals. This means
that the noise signals in lines 1 and 2 are offset against each other
and a reading for the signal, without inductive noise, can be made.
K7L
Signal transmission
circuit
Signal transmission line
Sensing
Band
4
2
3
Line 1
Line 2
Subtraction circuit
Connecting cable
Resistance
measurement
circuit
5
K7L-AT50@/AT50D@
Connections
External Connections
K7L-AT50/AT50B
K7L-AT50/AT50B
5
4
6
Level input 1
3
7
Level input 2
2
8
4 3 2
OUT- 100 mA at 30 VDC max.
Signal
transmission
2 3 4
F03-20 Terminal Block
OUT+ Open-collector output
Connecting cable
(0.2 mm2 min.)
Sensing Band
* Use a class 2 power supply for the DC power supply if UL/CSA or CE Marking
compliance is required.
1
Note: Always use a 3-conductor cable for wiring and connect to terminals 2, 3,
and 4 on the Unit. Connect the Sensing Band between terminals 2 and
4 or terminals 3 and 4.
12 to 24 VDC *
Connection Examples
Connection as an NPN Output
6
5
Load
Connection as an PNP (Equivalent) Output
6
Load
+
5
+
Load power supply
Load power supply
K7L-AT50D/AT50DB
Open-collector output
(Bottom view)
100 mA at
30 VDC max.
K7L-AT50D/AT50DB
COM-
Signal
transmission
4
6
Level input 1
3
7
Level input 2
2
8
Connecting cable
(0.2 mm2 min.)
Sensing Band
* Use a class 2 power supply for the DC power supply if UL/CSA or CE Marking
compliance is required.
1
+
F03-20T Terminator
2-4
(4-2)
Common
BURN OUT+
5
4 3 2
Disconnection
detection output
OUT+
2 3 4
F03-20 Terminal Block
Liquid leakage
detection output
-
Note: Always use a 3-conductor cable for wiring and connect to terminals 2, 3, and 4
on the Unit. Connect the Sensing Band between terminals 2 and 4 or terminals
3 and 4.
12 to 24 VDC *
Stripping and Connecting Terminals
1. Cut into the Sensing Band approximately 4 to 6 cm in from the end as shown in the diagram below.
2. Strip away approximately the last 9 mm of the sheath to expose the core (SUS line).
3. To connect to the Terminal Block, push down the top of the terminal with a screwdriver* and insert the core from the side. More Sensing Bands
can be connected simply by wiring in an arch shape.
4 to 6 cm
9 mm
Insert
Exposed
part of
core
F03-20
Terminal
Block
Note: When you are finished working, sufficiently confirm that there is an electrical connection.
* You can use a commercially available screwdriver, but we recommend either 1) a 210-350/01 Screwdriver or 2) a 209-132 Operating Tool from
Wago. Information: //www.wago.com
6
K7L-AT50@/AT50D@
Functions
Disconnection detection function (K7L-AT50D/AT50DB only)
Operation While Monitoring for Liquid Leakage
• Short-wave signals (2.5 VAC, 3.75 Hz) for liquid leakage detection
are output from terminal 4 of the K7L.
• When there is no liquid leakage, the liquid leakage detection
signals that are output are interrupted by the Terminator and the
core of the Sensing Band will form an open loop.
Signals interrupted by
Terminator.
K7L
8
3
7
2
K7L
3
7
2
K7L
8
1
Operation at Disconnection Detection
• If there is a disconnection, the signals will be interrupted at the
place where the disconnection occurred, and will not return to the
K7L.
• If the signals do not return when the K7L is in disconnection
monitoring mode, it will determine that a disconnection has
occurred. The output indicator will flash, and the disconnection
output will turn ON/OFF depending on the position of the DIP
switch (right).
Signals are interrupted where
the disconnection occurred.
4
5
1
6
3
7
2
4 3 2
8
4 3 2
4
6
4
5
6
2 3 4
• When liquid leakage occurs within the sensing range, the liquid
leakage detection signals output from terminal 4 are input to
terminal 2 through the leaked liquid.
• The voltage of the input signals will vary with the resistance of the
leaked liquid. This voltage is compared with the detection level set
at the K7L.
• If the K7L determines from the comparison results that there is
liquid leakage, the liquid leakage output will turn ON or OFF. (The
output can be set to NO or NC operation.) The output indicator will
turn ON and OFF together with the output. The indicator lights
when the output turns ON.
4 3 2
Operation at Liquid Leakage Detection
5
Disconnection detection
signals are not interrupted
by the Terminator and
return to the K7L.
10 VDC max., 200 ms
1
2 3 4
2
• Output of disconnection detection signals starts within 2 s of power
being supplied to the K7L and is repeated at 7-s intervals.
• Disconnection signals are DC signals of 10 V max. that are output
for approximately 200 ms. During this time, the K7L is in
disconnection monitoring mode, i.e. it monitors for disconnections
only and the liquid leakage detection signals are stopped.
• If there is no disconnection, the disconnection detection signals
(10 VDC) that are output pass through the Terminator and return
to the K7L. The K7L takes this as normal, i.e., there is no
disconnection.
2 3 4
3
7
4 3 2
4
5
6
2 3 4
2.5 VAC (3.75 Hz)
Operation While Monitoring for Disconnection
K7L
8
1
Note: 1. Disconnection detection is only performed between terminals 2 and 4. Therefore, be sure to connect the Sensing Band between
terminals 2 and 4.
2. The K7L will switch from liquid leakage detection to disconnection detection if either of the following conditions occur while liquid
leakage is detected.
2-1. Disconnection occurs between the K7L and the place where liquid is leaked.
2-2. While liquid leakage is detected, disconnection occurs between the place where liquid is leaked and the Terminator (F03-20T)
and, subsequently, the leaked liquid is removed (e.g., wiped up or dried).
3. During disconnection detection, liquid leakage will not be detected. Once disconnection has been detected, reset the power supply to
stop disconnection detection.
7
K7L-AT50@/AT50D@
Dimensions
(Unit: mm)
Terminal Block *
F03-20
Liquid Leakage Sensor Amplifier
K7L-AT50/AT50D
29.1
3
5.8
3
23.1
17.5
5×3=15
2.5
25
3.2
12.8
5.8
17
3.2
46
3.5
Mounting Hole
Dimensions
28.8
Two, M3
23±0.2
Liquid Leakage Sensor
K7L-AT50B/AT50DB
Terminator *
F03-20T
24.1
3
18.1
Mounting Hole
Dimensions
3
Two, M3
25
3.2
3.2
12.8
18±0.2
46
5.8
12.5
5.8
28.8
17
3.5
3.5
* The Terminal Block is made of nylon 66. Mount the Terminal Block in locations not subject to liquid chemicals using M3 screws.
8
K7L-AT50@/AT50D@
Track-mounted Sockets *
P2RF-08-E
Track-mounted Sockets *
P2RF-08 (Round terminals can be used.)
7
35.5
71.5 max.
31.5
2
Terminal
4 dia.
Arrangement
9.5
(TOP VIEW)
2
73 max.
Terminal Arrangement
(TOP VIEW)
1.5
48 max.
M3 screws
2
3 dia.
(21)
(22)
3.5 dia. hole
39.5
6 3
5 4
85.5
max.
6
3
7
2
5
4
(11)
(12)
(24) (14)
35.5
Eight, M3.5 x 8
7 2
8 1
19.5
4 19.5 max.
30 max.
11.5
4
16
54 max.
8 (A1)
(A2) 1
61 max.
84 max.
(Including height of DIN track) Figures in parentheses
indicate DIN standard
numbers.
Note: Secure the Sockets with M3 screws at a torque of 0.78 to 1.18 N⋅m. Note: Secure the Sockets with M3 screws at a torque of 0.78 to 1.18 N⋅m.
* The applicable models of the K7L depend on the model of the Socket. If * The applicable models of the K7L depend on the model of the Socket. If
the correct Socket is not used, the K7L nameplate will be upside down.
the correct Socket is not used, the K7L nameplate will be upside down.
Track-mounted Sockets
P2RF-08-PU
Terminal Arrangement/
Internal Connection Diagram
(TOP VIEW)
56.5 max.
56.3
52.4
A2
(1)
28.1
27.6
A1
(8)
(3)
90 max.
35.5
27.25
3.9
27.6
36.3
45
52.1
83 max.
(3)
15.5 max.
12
(2)
14
(4)
22
(7)
24
(5)
11
(3)
21
(6)
Note: The numbers in parentheses
are traditionally used
terminal numbers.
Note: The applicable models of the K7L depend on the model of the Socket. If the correct
Socket is not used, the K7L nameplate will be upside down.
Liquid Leakage Point Sensor
F03-16PS
F03-16PS-F
8
10
Bottom View
2
Electrode
Overall length
2,000 mm
Sheath: Fluoroplastic, 0.66 dia.
32 dia.
5.5 dia.
Conductor cross section:
0.079 mm2
2.6-dia. vinyl-insulated round cable
with 2 conductors
Point Sensor Mounting Bracket
F03-26PS
R5
10
19.2
1
24
8.85
1
3
R3
22.5
6 dia.
12
Glued surface *
* Use a commercially available bonding agent for PVC.
Do not use adhesive tape for securing.
9
K7L-AT50@/AT50D@
Mounting Methods
Stud Screw Mounting
Special Bracket Mounting
1. Securing the Sensor with a Nut
2. Securing the Sensor with a Wing Nut
*
* Use a commercially available bonding
agent for PVC.
Safety Precautions
Warning Indications
Application Precautions
Indicates a potentially hazardous
situation which, if not avoided, will result
in minor or moderate injury, or may result
in serious injury or death. Additionally
there may be significant property
damage.
You must allow sufficient leeway in ratings and performance, and
provide proper fail-safe or other safety measures when using these
products in any of the following applications. Be sure also to consult
with your OMRON representative before actually attempting any of
these applications.
Precautions for
Safe Use
Supplementary comments on what to do
or avoid doing, to use the product safely.
Precautions for
Correct Use
Supplementary comments on what to do
or avoid doing, to prevent failure to
operate, malfunction, or undesirable
effects on product performance.
1. Applications under conditions or environments not specified in
user documentation
2. Applications for nuclear control systems, railroad systems,
aviation systems, vehicles, combustion systems, medical
equipment, amusement machines, or safety equipment
3. Applications that may have a serious influence on lives and
property and thus require particularly attention to safety
WARNING
Meaning of Product Safety Symbols
Used for general prohibitions for which is no
specific symbol.
WARNING
This product is not designed or rated for ensuring
safety of persons either directly or indirectly.
Do not use it for such purposes.
Precautions for Safe Use
Observe the following points to ensure safe operation.
1. Be sure to use a power supply voltage within the specified range.
2. Do not use the product in locations subject to flammable gases or
combustible objects.
3. Insert the connection points into Sockets until the connection is
locked securely.
4. Do not short-circuit loads connected to output terminals.
5. Be sure to connect the power supply with the correct polarity.
Precautions for Correct Use
Do not use the Encoder under ambient conditions that exceed the
ratings.
Installation
Attach to a panel of thickness 1 to 5 mm.
Do not install in the following locations.
1. Locations subject to shock or vibration
2. Locations where the temperature or humidity lies outside the
specified range, or where condensation is likely to occur (To detect
liquids with high impedances, do not use in locations with high
humidity.)
3. Locations subject to dust
4. Locations subject to corrosive gases (particularly sulfide and
ammonia gases)
5. Outdoors or locations subject to direct sunlight
6. Near devices that generate strong high-frequency noise (e.g.,
highfrequency welding devices etc.)
10
K7L-AT50@/AT50D@
Liquid Leakage Sensor Amplifier K7L Q&A
Some questions that are frequently asked about the K7L are given below. Use this information when selecting a model.
Q
A
Can one K7L Amplifier be used for detection in more than
one place?
Yes.
By using Terminal Blocks to connect Sensing Bands in
parallel, detection can be performed in more than place with
only one K7L Amplifier.
Q
A
K7L-AT50
Possible wiring distance
for wiring cable.
Can a different terminal block (e.g. a commercially
available terminal block or a terminal block constructed
by the user) be used instead of the one provided?
Yes.
When using another terminal block, however, be sure to check
that all the terminals are mutually isolated, and that there is no
danger of ground faults in connecting cables or Sensing
Bands.
Possible wiring distance
for Sensing Band.
50 m max.
10 m max.
K7L-AT50
Note: For explosion-proof areas, use
F03-20 Liquid Leakage Sensor,
which has been certified for
intrinsic safety and explosionproof capability.
Q
Terminal Blocks
Note: 1. When wiring, be sure not to exceed the maximum possible
wiring distances for both the connecting cable and the Sensing
Band. Exceeding these distances may lead to faulty operation.
Connect one Sensing Band to each Terminal Block.
2. Not applicable to K7L-AT50D.
A
Can the K7L Amplifier detect pure water?
Yes.
Even pure water, which has a resistance exceeding 10
MΩ⋅cm, can nearly always be detected if the K7L is used at its
maximum sensitivity. This is because impurities are mixed
with the water when it is leaked and the resistance drops.
K7L-U
Impurities
in the air
400 m max.
Terminal Blocks
Impurities
on the drain
pan
K7L-U
Q
A
Note: 1. When wiring, be sure not to exceed the maximum possible
wiring distances for both the connecting cable and the
Sensing Band. Exceeding these distances may lead to
faulty operation. Connect one Sensing Band to each
Terminal Block.
2. Not applicable to K7L-UD.
Q
A
Pure water
Detection possible if
sensing range 3 (0 to
50 MΩ) is selected
using the DIP switch.
Can the K7L Amplifier detect oil?
In most cases, no.
If, however, it contains
impurities such as metal
powder, as is the case with
cutting oil and used engine oil,
detection may be possible
(actual instances of detection
have been observed). The
user should confirm whether
the required kind of detection
is possible before application.
Can the K7L Amplifier be used as a replacement for the
61F-GPN-V50 Water Leakage Detector?
Yes.
Because the surge withstand capability is different, however,
do not use in locations where it will be exposed to impulses
and surges, such as outdoor roofs or in pump panels. Also,
items such as the power supply voltage and the connection
sockets are different. Check these items before application.
11
Liquid Leakage Sensor Amplifiers for Long-distance Wiring
K7L-U@/-UD@
Ultra-miniature Liquid Leakage Sensor
Amplifier Enables Longest Liquid
Leakage Monitoring Distance in Industry
• New models available that are compatible with Push-In Plus
Terminal Block Sockets.
• UL listed when used with Push-In Plus Terminal Block Sockets. *1
• Stable detection of liquids with impedance as high as 1 MΩ
using inter-electrode resistance detection. Detection of
*1. The UL listing applies only when the Sensor is used in
combination with a Push-In Socket (P2RF-08-PU).
chemical liquids and pure water is possible.
By itself, the K7L is UL recognized.
• Higher noise immunity with a noise canceller circuit
*2. For the K7L-UD.
*3. UL:
UL 508
connected to a 3-conductor cable.
CAN/CSA
C22.2 No.14
• Prevents electrode corrosion with an AC detection method.
CE:
EMI EN 55011
EMS EN 61000-6-2
• The power supply circuit and detection circuit are isolated,
allowing several Amplifiers to be installed in the same place.
• After a disconnection is detected, operating status is held to eliminate instability due to contact of the disconnected part. *2
• CE Marking and UL/CSA certification. *3
Refer to Safety Precautions on page 19.
Features
A total distance of 400 m is achieved for cable and Sensing Band to minimize leakage damage.
Greatly expands the detection area.
Detects broken wires.
Broken
wire signal Detects broken wires all the way from the
main unit to the tip of the Sensing Band.
This enhances reliability in long-distance
wiring applications.
A total distance of 400 m for the cable and Sensing
Band extends the wiring distance by approximately
7 times compared with our previous models.
Cable
Industry's
longest
Breaks
in wiring
4
3
2
3
2-4
(4-2)
2
Sensing Band
3
2
4
3
2
4
4
Terminal Block
Sensing Band
Total length of cable and Sensing Band is 400 m max.
* According to an OMRON survey
Helps to downsize gang-mounted panels.
Terminal Block
Terminator
Cable
Features a Noise Canceller (Patented)
The extremely compact size,
with a width of only 16 mm,
helps to save panel size when
mounting several Units together.
A noise canceling circuit employing
a three-conductor cable enables
stable liquid leakage detection with
excellent noise resistance.
Connecting cable
Only 192 mm for 12 Units
Application Examples
Floor or Ceiling of Semiconductor or
Flat Panel Display Factory
K7L-U(D)
12
Floor below Chemical Purification Tank
K7L-U(D)
K7L-U@/-UD@
Model Number Legend
K7L-U @ @
(1) (2)
(1)
(2)
Symbol
Meaning
Symbol
Blank
No sensor disconnection detection
Blank
D
Sensor disconnection detection
B
Meaning
Ivory, Screw Terminal Block Socket
Black, Push-In Plus Terminal Block Socket
Note: If you want a Push-In Plus Terminal Block Socket, use the [email protected] (The terminal
arrangement of a Push-In Plus Terminal Block Socket is upside down in comparison
with a Screw Terminal Block Socket.)
Ordering Information
Characteristics
Product name
Liquid Leakage Sensor
Amplifier *1
Amplifier
Model
K7L-U
Liquid Leakage Sensor
Amplifier *1
K7L-UB
Liquid Leakage Sensor
Amplifier with
Disconnection Detection
Function *1
K7L-UD
Liquid Leakage Sensor
Amplifier with
Disconnection Detection
Function *1
K7L-UDB
F03-15
F03-16PE
Sensing Band
Sensors
F03-16PT
F03-16SF
F03-16SFC
Point Sensor
(for K7L-U/UB)
F03-16PS
F03-16PS-F
Ambient
temperature
Ambient humidity
Operating: 45% to 85%
Insulation resistance
10 MΩ at 100 VDC between case and current-carrying parts
Dielectric strength
1,000 VAC at 50/60 Hz for 1 min between case and
current-carrying parts
Power consumption
1 W max.
Response time
Operate:800 ms max.
Release:800 ms max.
Startup time after power ON: 2 s max.
Weight
Approx. 14 g
Ratings
Rated power
12 to 24 VDC
supply voltage (Allowable voltage fluctuation range: 10 to 30 VDC)
0 to 1 MΩ variable
Operate
resistance
F03-25
Mounting Brackets
and Stickers
Track-mounted
Socket *2
(for K7L-U/UD)
Track-mounted
Socket *2
(for K7L-UB/UDB)
Terminal Blocks
Sensing Band Stickers
Operating: –10 to 55°C
F03-26PES
Note: The adjuster (ADJUST) on the top of the Sensor
Amplifier sets the resistance for detection within
the setting range. It is factory-set to the upper
limit. (Normally, the K7L can be used with the
adjuster at this setting.)
F03-26PTN
Disconnecti
on detection
function *
Detection signal: 10 VDC max., 200 ms
Detection time: 10 s max.
Recovery: Operation is recovered by resetting the power supply.
Point Sensor Mounting
Brackets
F03-26PS
Release
resistance
105% min. of operate resistance
Round terminals can be
used.
P2RF-08
Round terminals cannot
be used.
P2RF-08-E
Push-In Plus Terminal
P2RF-08-PU
F03-26PEN
F03-20
*1. Accessories are available. Check the ratings for details.
*2. The applicable models of the K7L depend on the model of the
Socket. If the correct Socket is not used, the K7L nameplate will
be upside down.
NPN open-collector transistor output with 100 mA at 30 VDC max.
for both liquid leakage detection and disconnection detection.
Note: If the rightmost pin of the DIP switch on the side of the
Output
Sensor Amplifier is set to the down position, the output
configuration
turns ON when liquid is detected; if it is set to the up
position, the output turns OFF when liquid is detected.
Vibration
resistance
10 to 150 Hz, 0.1-mm single amplitude with 15-m/s2 acceleration
for 8 minutes 10 times each in X, Y, and Z directions
Shock
resistance
150 m/s2 3 times each in six directions on 3 axes
Wiring cable
Sensing Band
Wiring
distance
}
Product
Name
Accessories
Total: 400 m max.
Note: These values are possible on the condition that a
completely insulated 3-conductor VCT cable with
a thickness of 0.75 mm2 and a dielectric strength
of 600 V is used together with the Liquid Sensing
Band specified by OMRON. (A 0.2-mm2 cable
can also be used.)
Model
Terminal
Block
Screwdriver
for ADJUST
Terminator
F03-20
---
F03-20T
K7L-U/UB
1
1
---
K7L-UD/
UDB
1
1
1
* For the K7L-UD.
13
K7L-U@/-UD@
Nomenclature and DIP Switch Settings
K7L-U/UD
Power indicator (green)
(Lit when power is supplied.)
Output indicator (red)
(Lit when output is ON.)
Resistance adjuster
Sensing Range Settings
DIP switch
Output
Output is OFF when liquid leakage
or disconnection is detected. *
K7L-UB/UDB
Output is ON when liquid leakage
or disconnection is detected. *
Resistance
adjuster
* Disconnection detection is supported only by the
K7L-UD/UDB.
Output indicator (red)
(Lit when output is ON.)
Power indicator (green)
(Lit when power is supplied.)
Noise Countermeasures (Common)
Noise Canceller Function for Highly Sensitive Impedance
Detection
Connected with 3-conductor Cable that Offsets Inductive
Noise (Patent Pending)
The K7L-U/UB Liquid Leakage Sensor Amplifier detects liquids with
impedance as high as 1 MW and connects to the Sensing Band
through a cable that can be extended up to 400 meters.
Countermeasures against external noise are especially important for
the Sensing Band and connecting cable because they pick up
external noise like an antenna. The K7L incorporates the noise
canceller function described below.
A VCT cable with three conductors (lines) is used as shown in the
diagram. Line 1 is connected to the Sensing Band and line 2 is left
open. Lines 1 and 2 are almost in the same position and thus will
experience the same noise level. The K7L detects the difference
between these signals (including noise). This means that the noise
signals in lines 1 and 2 are offset against each other and a reading for
the signal, without inductive noise, can be made.
K7L
Sensing
Band
Signal
transmission circuit
Signal transmission
line
Line 1
Line 2
Connecting cable
4
2
3
Subtraction circuit
Resistance
measurement circuit
14
K7L-U@/-UD@
Connections
K7L-U/UB
K7L-U/UB
Signal
transmission
4
OUT- 100 mA at 30 VDC max.
6
Level input 1
3
7
Level input 2
2
8
Connecting cable
(0.2 mm2 min.)
4 3 2
5
2 3 4
F03-20 Terminal Block
OUT+ Open-collector output
Sensing Band
Example: F03-16PE
* A Class 2 power supply must be used for the DC power supply to comply with UL standards.
Note: Always use a 3-conductor cable for wiring and connect to terminals 2, 3, and 4
on the Unit. Connect the Sensing Band between terminals 2 and 4 or terminals 3 and 4.
1
12 to 24 VDC *
Output Circuit Examples
The NPN open-collector output of the K7L-U/UB is isolated from the internal circuits by a photocoupler, so you can use either an NPN opencollector output or a PNP (equivalent) output.
NPN Output
PNP (Equivalent) Output
6
5
Load
Load power supply
6
5
Load
Load power supply
K7L-UD/UDB
K7L-UD/UDB
Terminal Block
F03-20
5
Disconnection
BURN OUT+
detection output
COMCommon
6
Level input 1
3
7
Level input 2
2
8
4
1
Commercially available
connecting cable (0.2 mm2 min.)
Terminator
F03-20T
2-4
(4-2)
OUT+
Signal
transmission
4 3 2
Liquid leakage
detection output
(Bottom View)
2 3 4
Open-collector output
30 VDC max.
100 mA
Sensing Band
Example: F03-16PE
* A Class 2 power supply must be used for the DC power supply to comply with UL standards.
Note: Always use a 3-conductor cable for wiring and connect to terminals 2, 3, and 4 on the Unit.
Connect the Sensing Band between terminals 2 and 4 or terminals 3 and 4.
12 to 24 VDC *
15
K7L-U@/-UD@
Disconnection Detection Function (K7L-UD/UDB)
Operation While Monitoring for Liquid Leakage
Operation While Monitoring for Disconnection
• Short-wave signals (2.5 VAC, 3.75 Hz) for liquid leakage detection
are output from terminal 4 of the K7L.
• When there is no liquid leakage, the liquid leakage detection
signals that are output are interrupted by the Terminator and the
core of the Sensing Band will form an open loop.
2.5 VAC (3.75 Hz)
2
2 3 4
3
7
Signals interrupted by
Terminator.
4 3 2
4
5
6
• Output of disconnection detection signals starts within 2 s after
power is supplied to the K7L and is repeated at approximately 7-s
intervals.
• Disconnection signals are DC signals of 10 V max. that are output
for approximately 200 ms. During this time, the K7L is in
disconnection monitoring mode, i.e. it monitors for disconnections
only and the liquid leakage detection signals are stopped.
• If there is no disconnection, the disconnection detection signals (10
VDC) that are output pass through the Terminator and return to the
K7L. The K7L takes this as normal, i.e., there is no disconnection.
K7L
2
6
3
7
2
K7L
8
1
Operation at Disconnection Detection
2 3 4
3
7
4 3 2
4
6
4
5
• When liquid leakage occurs within the sensing range, the liquid
leakage detection signals output from terminal 4 are input to
terminal 2 through the leaked liquid.
• The voltage of the input signals will vary with the resistance of the
leaked liquid. This voltage is compared with the detection level set
at the K7L.
• As a result of the comparison, if the K7L determines that liquid
leakage has occurred, the K7L's output LED will light, and the liquid
detection output will either turn ON or OFF.
4 3 2
Operation at Liquid Leakage Detection
5
Disconnection detection signals
are not interrupted by the
Terminator and return to the K7L.
10 VDC max., 200 ms
1
2 3 4
8
• If there is a disconnection, the signals will be interrupted at the
place where the disconnection occurred, and will not return to the
K7L.
• If the signals do not return, it will determine that a disconnection
has occurred. The output indicator will flash, and the disconnection
output will turn ON/OFF.
Signals are interrupted where the
disconnection occurred.
1
4
5
6
3
7
2
4 3 2
8
2 3 4
K7L
K7L
8
1
Note: 1. Disconnection detection is only performed between terminals 2 and 4. Therefore, be sure to connect the Sensing Band between terminals
2 and 4.
2. The K7L will switch from liquid leakage detection to disconnection detection if either of the following conditions occur while liquid leakage
is detected.
2-1. Disconnection occurs between the K7L and the place where liquid is leaked.
2-2. While liquid leakage is detected, disconnection occurs between the place where liquid is leaked and the Terminator (F03-20T) and,
subsequently, the leaked liquid is removed (e.g., wiped up or dried).
3. During disconnection detection, liquid leakage will not be detected. Once disconnection has been detected, reset the power supply to
stop disconnection detection.
Surges
Use in conjunction with a 61F-03B/04B Surge Suppressor Unit in environments exposed to surges.
Install the Surge Suppressor Unit near the K7L. The surge suppression may not be sufficient if the Surge Suppressor Unit is installed near the
Sensing Band.
3
7
2
4 3 2
6
2 3 4
Induced lightening
4
5
61F-03B
Electrode connection
terminals
3
5
9
1
7
11
61F-04B
Electrode connection
terminals
3
4
8
9
1
6
7
11
K7L
8
1
61F-03B
When using shield wire
Ground
Note: For details on Surge Suppressor Units, refer to your OMRON website.
16
Ground
K7L-U@/-UD@
Dimensions
(Unit: mm)
Terminal Block *
F03-20
Liquid Leakage Sensor Amplifier
K7L-U/-UD
12.8
46
29.1
3
2
3
2
25
3.2
2
3
5.8
17.5
2.5
5×3=15
4
28.8
5.8
3
23.1
3 4
17
3.2
4
3.5
Terminator *
F03-20T
Liquid Leakage Sensor Amplifier
K7L-UB/-UDB
24.1
3
3
18.1
Mounting Hole Dimensions
2-4
(4-2)
12.8
46
Two, M3
25
3.2
3.2
18±0.2
28.8
Track-mounted Sockets *
P2RF-08 (Round terminals can be used.)
7
Track-mounted Sockets *
P2RF-08-E
2
73 max.
Eight,
M3.5 × 8
35.5
71.5 max.
19.5
(21)
39.5
85.5
max.
6
3
7
2
5
4
(11)
(12)
(24) (14)
35.5
7 2
8 1
4
54 max.
Note: The applicable models of the K7L depend on the model of the
Socket. If the correct Socket is not used, the K7L nameplate will
be upside down.
11.5
16
8 (A1)
61 max.
84 max.
(Including height of DIN track)
(A2) 1
Figures in parentheses
indicate DIN standard
numbers.
Note: The applicable models of the K7L depend on the model of the
Socket. If the correct Socket is not used, the K7L nameplate will
be upside down.
Terminal Arrangement/
Internal Connection Diagram
(TOP VIEW)
56.5 max.
56.3
52.4
A2
(1)
28.1
27.6
A1
(8)
(3)
90 max.
35.5
27.25
3.9
2
3 dia.
3.5 dia. hole
6 3
5 4
30 max.
Front-mounting Sockets
P2RF-08-PU
48 max.
(22)
31.5
4 19.5 max.
1.5 M3 screws
2
Terminal
4 dia.
9.5 Arrangement
(Top view)
Terminal Arrangement
(Top view)
27.6
36.3
45
52.1
83 max.
(3)
15.5 max.
Note: The applicable models of the K7L depend on the model of the Socket. If the
correct Socket is not used, the K7L nameplate will be upside down.
12
(2)
14
(4)
22
(7)
24
(5)
11
(3)
21
(6)
Note: The numbers in parentheses
are traditionally used terminal
numbers.
* The Terminal Block is made of nylon 66. Mount the Terminal Block in locations not subject to liquid chemicals using M3 screws.
17
K7L-U@/-UD@
Liquid Leakage Point Sensor
F03-16PS
F03-16PS-F
8
10
Bottom View
2
Electrode
Overall length
2,000 mm
Sheath: Fluoroplastic, 0.66 dia.
32 dia.
5.5 dia.
Conductor cross section:
0.079 mm2
2.6-dia. vinyl-insulated round cable with
2 conductors
Point Sensor Mounting Bracket
F03-26PS
R5
10
19.2
1
24
1
R3
22.5
6 dia.
* Secure the Sockets with M3 screws at a torque of 0.78 to 1.18 N·m.
18
12
8.85
3
K7L-U@/-UD@
Safety Precautions
Warning Indications
WARNING
Indicates a potentially hazardous
situation which, if not avoided, will result
in minor or moderate injury, or may result
in serious injury or death. Additionally
there may be significant property
damage.
Precautions for
Safe Use
Supplementary comments on what to do
or avoid doing, to use the product safely.
Precautions for
Correct Use
Supplementary comments on what to do
or avoid doing, to prevent failure to
operate, malfunction, or undesirable
effects on product performance.
Application Precautions
You must allow sufficient leeway in ratings and performance, and
provide proper fail-safe or other safety measures when using these
products in any of the following applications. Be sure also to consult
with your OMRON representative before actually attempting any of
these applications.
1. Applications under conditions or environments not specified in
user documentation
2. Applications for nuclear control systems, railroad systems,
aviation systems, vehicles, combustion systems, medical
equipment, amusement machines, or safety equipment
3. Applications that may have a serious influence on lives and
property and thus require particularly attention to safety
Meaning of Product Safety Symbols
Used for general prohibitions for which is no
specific symbol.
WARNING
This product cannot be used as a detection device for
protecting human life.
Precautions for Safe Use
Observe the following points to ensure safe operation.
1. Be sure to use a power supply voltage within the specified range.
Not doing so may result in burning or malfunction.
2. Do not use the product in locations subject to flammable gases or
combustible objects. Doing so may result in fire.
3. Insert the connection points into Sockets until the connection is
locked securely. Not doing so may result in burning or malfunction.
4. Do not short-circuit loads connected to output terminals. Doing so
may result in burning.
5. Be sure to connect the power supply with the correct polarity. Not
doing so may result in malfunction.
Precautions for Correct Use
Installation
Attach to a panel of thickness 1 to 5 mm.
Do not install in the following locations.
1. Locations subject to shock or vibration
2. Locations where the temperature or humidity lies outside the
specified range, or where condensation is likely to occur (To detect
liquids with high impedances, do not use in locations with high
humidity.)
3. Locations subject to dust
4. Locations subject to corrosive gases (particularly sulfide and
ammonia gases)
5. Outdoors or locations subject to direct sunlight
6. Near devices that generate strong high-frequency noise (e.g.,
high-frequency welding devices etc.)
19
K7L-U@/-UD@
Liquid Leakage Sensor Amplifier K7L FAQs
Some questions that are frequently asked about the K7L are given below. Use this information when selecting a model.
Q
A
Can one K7L Amplifier be used for detection in more than
one place?
Yes.
By using Terminal Blocks to connect Sensing Bands in
parallel, detection can be performed in more than place with
only one K7L Amplifier.
Q
A
Total: 400 m max.
Can a different terminal block (e.g. a commercially
available terminal block or a terminal block constructed
by the user) be used instead of the one provided?
Yes.
When using another terminal block, however, be sure to check
that all the terminals are mutually isolated, and that there is no
danger of ground faults in connecting cables or Sensing
Bands.
Terminal Block
K7L-U
Q
A
Note: 1. When wiring, be sure not to exceed the maximum possible
wiring distances for both the connecting cable and the
Sensing Band. Exceeding these distances may lead to
faulty operation. Connect one Sensing Band to each
Terminal Block.
2. Not applicable to the K7L-UD.
Q
A
20
Can the K7L Amplifier be used as a replacement for the
61F-GPN-V50 Water Leakage Detector?
Yes.
Because the surge withstand capability is different, however,
do not use in locations where it will be exposed to impulses
and surges, such as outdoor roofs or in pump panels. Also,
items such as the power supply voltage and the connection
sockets are different. Check these items before application.
Can the K7L Amplifier detect pure water?
Yes.
Even pure water, which has a resistance exceeding 10 MWΩ
⋅cm, can nearly always be detected if the K7L is used at its
maximum sensitivity. This is because impurities are mixed
with the water when it is leaked and the resistance drops.
Impurities
in the air
Pure water
Inpurities on
the drain pan
Q
A
Can the K7L Amplifier detect oil?
No.
F03-16PE/-16PT/-15/-16PS
Sensing Band/Point Sensor
F03-16PE
F03-16PT
Liquid Leakage
Sensing Band
Fluoroplastic
Sensing Band
• SUS316 used for core and polyethylene used for sheath to ensure high
• Compared to the F03-16PE (polyethylene), the F03-16PT has higher
resistance to both acidic and alkaline liquids.
• Sensing Band Stickers that use the same material as the Sensing Band's
insulating resin are available in 2 types: adhesive-tape type and screw type.
• Detection precision remains constant even with a loopback, thanks to a two-
resistance to both high temperatures and chemicals.
sided detection design.
Ordering Information
Ordering Information
Name
Name
Model number
Liquid Leakage Sensing Band
Sensing Band Stickers
Model number
F03-16PE
Fluoroplastic Sensing Band
F03-16PT
F03-26PES
Fluoroplastic Sensing Band Stickers
F03-26PTN
Specifications
F03-26PEN
Specifications
Sheath
PTFE fluoroplastic
Sheath
Polyethylene
Core
SUS316 stainless steel
Core
SUS316 stainless steel
Ambient operating temperature
–50 to 200°C
Ambient operating temperature
–15 to 55°C
Weight
Approx. 16 g (1 m)
Weight
Approx. 16 g (1 m)
Dimensions
Sensing Band
F03-16PE
Dimensions
Fluoroplastic Sensing Band
F03-16PT
(Unit: mm)
(Unit: mm)
Appearance
Appearance
4
20
1.2
Structure
1.7
1.2
10
1.7
Structure
8
5 2.7
19/0.12x0.6t
SUS316
Materials: Electrodes: SUS316 stainless steel, Sheath: Fluoroplastic
Materials: Electrodes: SUS316 stainless steel, Sheath: Fluoroplastic
Sensing Band Stickers
F03-26PEN (screws)
(Unit: mm)
Fluoroplastic Sensing Band Stickers
F03-26PTN (screws)
Appearance
22
5
5
Appearance
32
6.5
Structure
1.0
3.0
6.5
Two, 3.5 dia.
Cut section
25
Material: Polyethylene
F03-26PES (adhesive tape)
(Unit: mm)
12
Structure
(Unit: mm)
15
Two, 3.5 dia.
3.0
Material: Fluoroplastic PTA
Appearance
19.2
5
Structure
13
Adhesive tape *
Material: Polyethylene
* The shape of the adhesive tape shown above is for securing the F03-16PE.
Chemical Resistivity
Polye
thylene
SUS316
Fluoro
plastic
Polye
thylene
SUS316
Fluoro
plastic
Water
A
A
A
Toluene
C
B
B
Acetone
C
A
A
Phenol
B
A
B
Ammonia
A
A
A
Butanol
B
---
A
Ethanol
B
A
A
Fluorine
A
C
A
Hydrochloric acid
A
C
A
Hexane
C
---
A
Hydrogen
peroxide solution
A
A
A
Benzene
C
A
A
Methanol
B
A
A
Xylene
B
A
A
Sulfuric acid
C
B
A
Cyclohexane
C
---
A
Phosphoric acid
A
B
B
Trichloroethylene
C
A
A
Note: 1. The F03-16PE Sensing Band is
made from the following materials.
Core: SUS316
Insulated sheath: Polyethylene
2. In order to prevent secondary fire
damage, consider the effect of the
atmosphere of the environment and
the solution to be detected on the
Sensing Band.
3. If the Sensing Band changes shape
or color when a liquid is detected,
replace the Sensing Band.
A: Not affected at all or only very slightly affected.
B: Slightly affected but, depending on the conditions, sufficient for use.
C: Affected but may still be used. (Replace the Sensing Band immediately after detection.)
21
F03-16PE/-16PT/-15/-16PS
Indicates models that allow free cutting.
F03-15
F03-16PS
Sensing Band
Liquid Leakage
Point Sensor
• Ideal for harsh electrical room environments that are dusty and humid.
• For installation in locations requiring insulated materials.
Ordering Information
Name
Model number
Liquid Leakage Sensing Band
F03-15
Sensing Band Stickers
F03-25
•
•
•
•
Can be used in conjunction with Sensing Bands.
Stud screw mounting requires no tools for installation.
No tools means the Sensor can be wiped clean quickly and easily.
The optional Mounting Bracket enables faster installation than
three-screw mounting.
• Connect multiple Sensors to one K7L Amplifier for significant cost
savings.
Ordering Information
Specifications
Sheath
Name
Flexible, transparent vinyl chloride
Model number
F03-16PS
Core
SUS304 stainless steel
Liquid Leakage Point Sensor
Ambient operating
temperature
−15 to 50°C
Mounting Brackets *2
F03-26PS
Weight
Approx. 48 g (1 m)
Terminal Block *3
F03-20
Dimensions
Sensing Band
F03-15
(Unit: mm)
F03-16PS-F *1
*1. The electrodes have a fluorine coating.
*2. Use a commercially available bonding agent for PVC. One bag
contains 10 Brackets.
*3. One bag contains 10 Blocks.
Specifications
Appearance
Material
Electrode pairs
Structure
Conductors
(Stainless steel wire
0.3 mm x 12-wire braided cable)
8
25
Flexible, transparent
vinyl chloride
333 (3 pairs/m)
Sensing Band Stickers
F03-25
(Unit: mm)
Appearance
(0.5)
(5)
Structure
Polyethylene
Conductor
Outer sheath: PVC, Inner sheath: Fluorine resin
Core
F03-16PS: SUS304 stainless steel
F03-16PS-F: SUS304 and fluorine coating
Ambient operating
temperature range
−10 to 60°C
Weight
Approx. 30 g
Maximum number of
Point Sensors
connected per
Amplifier
You can use as many Point Sensors as required as
long as the following conditions are met.
K7L-AT50 (K7L-AT50D cannot be used): 60 m max.
K7L-U (K7L-UD cannot be used): 400 m max.
61F-WLA or 61F-GPN-V50: 200 m max.
Wiring Diagram
25±2
(3)
Sensor
Amplifier
15±1
Adhesive tape
(1)
Material: SUS304
Any number of Sensors can be connected in parallel as long as the
following cable lengths are not exceeded for the Sensing Bands and
connecting cables.
K7L-AT50 (operate resistance of 50 MW max.): 60 m max.
K7L-U (operate resistance of 1 MW max.): 400 m max.
However, the leakage areas cannot be determined with the K7L-AT50.
5
6
7
4
3
2
8
1
4
3
2
4
3
2
4
3
2
4
3
2
4
3
2
4
3
2
Liquid Leakage Point Sensor
F03-16PS
Liquid Leakage
Sensor Amplifier
K7L-AT50 or K7L-U
Liquid Leakage Point Sensor
F03-16PS
Sensing Band
Terminal Block
F03-20
K7L-AT50
K7L-U
: Total length of 60 m max. (Sensing Bands: 10 m max.)
: Total length of 400 m max.
Dimensions
Refer to pages 17 and 18.
22
F03-16PE/-16PT/-15/-16PS
Connecting the Sensing Band
Connecting F03-20 Terminal Blocks and Sensing Cables
The F03-20 Terminal Block is provided to connect the connecting
cable from the K7L Liquid Leakage Sensor Amplifier to a Sensing
Band in a liquid detection application.
Stripping and Connecting Terminals
1. Cut into the Sensing Band approximately 4 to 6 cm in from the end
as shown in the diagram below.
2. Strip away approximately the last 9 mm of the sheath to expose
the core (SUS line).
3. To connect to the Terminal Block, insert the screwdriver * from the
top of the Terminal Block and insert the stripped end of the core
from the side. (Refer to Dimensions on page 17.)
4 to 6 cm
9 mm
Insert
Exposed
part of
core
F03-20
Terminal
Block
Note: Check that the wiring is secure before using the K7L in
applications.
* You can use a commercially available screwdriver, but we
recommend either 1) a 210-350/01 Screwdriver or 2) a 209-132
Operating Tool from Wago. Information: //www.wago.com
When you install a Sensing Band, use Sensing Band Stickers
(e.g., F03-26PES) to hold it in place.
If required by your application, another method can be used (e.g.,
installation with suitable connectors).
After installation, confirm that a reliable electrical connection has
been achieved.
Interval Between Stickers
When securing the Sensing Band with Stickers, attach the Stickers at
intervals of 20 to 30 cm in places where the core is not exposed.
Secure the Sensing Band as close to a
Terminal Block or Terminator as possible.
20 to 30 cm
Sensing
Band
Sticker
Terminal Block or Terminator
Note: 1. When using the F03-26PES (adhesive-tape model), be sure
to wipe all moisture, oil, and dust from the surface to which
the Sticker is to be attached. Failure to do so may result in
insufficient adhesion, and the Sticker may peel away from
the surface.
2. When using the F03-26PEN (screw model), before
installing the Sensing Band, it is necessary to perform stud
welding. For details on the pitch of the studs, refer to the
information on the dimensions of Sensing Band Stickers.
3. If you connect a Sensor Band with an F03-20 Terminal
Block and F03-20T Terminator, secure the Sensing Band
with Sensing Stickers near the Terminal Block and
Terminator to help adsorb stress, e.g., from something
pulling on the Sensing Band.
Bending the Sensing Band
To change the direction of the Sensing Band, bend the Sensing Band
in one or two places where the core is not exposed.
Bent in 1 place
Bent in 2 places
Note: Bend the Sensing Band approximately 4 cm (i.e., twice the
distance between places where the core is exposed) away
from places where a Sticker is attached. If the Sensing Band
is bent at places further away than this, the Sensing Band may
come away from the surface.
23
F03-16SF/-16SFC
Liquid Leakage Sensing Band
F03-16SF/F03-16SFC
Liquid Leakage Sensing Band
Greater flexibility and superior workability compared
with the F03-16PE. The sheath becomes transparent
to reveal the red inner sheath if liquid leakage occurs,
thereby enabling visual confirmation. After drying, the
Sensing Band color will return to white.
F03-16SF
F03-16SFC (with color indication)
Ordering Information
Type
Length
Liquid Leakage Sensing Band
(without color indication)
F03-16SF
Liquid Leakage Sensing Band
(with color indication)
F03-16SFC
Model
Model
5m
F03-16SF-5M
F03-16SFC-5M
10 m
F03-16SF-10M
F03-16SFC-10M
20 m
F03-16SF-20M
F03-16SFC-20M
30 m
F03-16SF-30M
F03-16SFC-30M
50 m
F03-16SF-50M
F03-16SFC-50M
100 m
F03-16SF-100M
F03-16SFC-100M
Note: When you select a Sensing Band, confirm the suitability for the detection liquid and the specifications of the Water/Liquid Leakage Sensor.
Specifications
Sheath
Special plastic fiber braided cable with water-absorbent and water-repellent characteristics
Core
Tin-plated, copper-stranded wire 0.75mm2
Ambient operating
temperature
−15 to 60°C
Weight
Approximately 20 g (1 m)
Note: 1. In order to prevent secondary fire damage, consider the effect of the atmosphere of the environment and the solution to be detected on
the Sensing Band.
2. If the Sensing Band becomes misshapen, discolored, or otherwise abnormal after detection, replace the Sensing Band.
Dimensions
Sensing Band
Type
Item
(Unit: mm)
Cable Sticker
Liquid Leakage
Sensing Band
F03-16SF
Electrode
Liquid Leakage
Sensing Band
(with color indication)
F03-16SFC
Internal braiding
Appearance
Appearance
F03-25
External
braiding
Dimensions
Structure
5 mm max.
24
External
braiding (white)
Internal
braiding
(red)
Electrode
External
braiding (white)
Internal
braiding
(white)
Electrode
5 mm max.
25±2
(5)
(3)
(0.5)
15±2
Adhesive tape *
Material: SUS304
(1)
Terms and Conditions Agreement
Read and understand this catalog.
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have
any questions or comments.
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for a period of twelve months from the date of sale by Omron (or such other period expressed in writing
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writing, are not to be construed as an amendment or addition to the above warranty.
See http://www.omron.com/global/ or contact your Omron representative for published information.
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Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining
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Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our practice
to change part numbers when published ratings or features are changed, or when significant construction changes are made.
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Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is
assumed for clerical, typographical or proofreading errors or omissions.
OMRON Corporation
Industrial Automation Company
Authorized Distributor:
Kyoto, JAPAN
Contact: www.ia.omron.com
Regional Headquarters
OMRON EUROPE B.V.
Wegalaan 67-69, 2132 JD Hoofddorp
The Netherlands
Tel: (31)2356-81-300/Fax: (31)2356-81-388
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Singapore 119967
Tel: (65) 6835-3011/Fax: (65) 6835-2711
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200 Yin Cheng Zhong Road,
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Tel: (86) 21-5037-2222/Fax: (86) 21-5037-2200
© OMRON Corporation 2016 All Rights Reserved.
In the interest of product improvement,
specifications are subject to change without notice.
CSM_1_1_0316
Cat. No. N211-E1-01
0316(0316)
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