LSK x5x Conductive Level Sensor
Wetted parts in acid-proof, stainless steel and PEEK
Compact, food compatible, hygienic design
3A approved, FDA and EHEDG compliant
Process temperature -20...140°C
Optimised flow geometry
LSK350
Millimetre precise switch point
Optional PTFE coating
Optional Switching module DNGA 230100
Description
The conductive level sensor LSK is used for level detection and dry run The LSK provides no current output by itself.
protection in conductive liquids.
Thus an evaluation module such as DNGA 230 100 is needed to
provide an output signal.
The LSK measures the resistance between the ground potential and
the sensing element covered by the conductive liquid.
For a non-conductive tank a 2 rod sensor is needed - one sensor
being the reference (ground) terminal. In this application an integrated
The tank or pipe side acts as the ground potential. If the tank is made
LKP100 output module with a 50 mA output is relevant.
of a non-conducting material a ground electrode must be installed.
The hygienic installation is ensured by using a hygienic process weldin sleeve e.g. PM 050. The rod electrodes can be shortened to any
required length simply by cutting the length.
The LSK is well suitable for CIP and SIP processes.
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Design and specifications subject to change without notice
Data Sheet LSK-2
Page 1
Technical Data - LSKx5x
Sensor
Amplifier LKP100
Principle
Resistance measurement
Input
Electrode and ground
Process connection
G1 hygienic
Amb. temperature
-20...60°C
2...4 electrodes
20...200 cm, see "Ordering Details"
Power supply
18...36 Vdc; 10 mA max. (+ load)
Insulating material
PEEK
Sensitivity
200 Ohm; 2 KOhm, 20KOhm (wiring)
Switching function
Selectable output polarity
Damping
0.5 sec. (fixed)
Relay output
Max. load 50 mA, short circuit protected
Monitor
LED
Dimensions
ø44 x 21 mm
Electrical connection
Cable gland M16 Plast
Plug M12
Nickel-plated brass
(For 2- or 3 rod models only)
Mechanical data
Process temperature
-20...140°C
EMC data
Amb. temperature
-20...85°C
Immunity
EN 61326
Housing
Stainless steel, W1.4301/AISI 304
Emission
EN 61326
Process conn. and rod
Stainless steel, W1.4404/AISI 316 L
Disposal of product and packing
Protection class
IP67
According to national laws or by returning to Baumer
Media pressure
Max. 16 bar
Vibrations
IEC 68-2-6, GL test2
Powder coating
PTFE, Accofal 3G54
Approval
3A
Adapters
Refer to “Accessories” data sheet
Dimensional Drawings - LSKx5x
[mm]
Electrical Installation
ø55
M12plug
3
4
2
1
58
M16
E2 E1
8
2 or 3 rods
Gnd E3
AF37
G1
33
3
4
2
1
L
5
6
4 rods
E2 E1
E1
E3
4
1
ø4
Gnd E4 E3
1: Brown
2: White
M12 plug
3: Blue
4: Black
2
3
E2
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Design and specifications subject to change without notice
Gnd
Data Sheet LSK-2
Page 2
Ordering Details - LSK x5x
LSK x5x xxx xxx (xxx xxx) x
Type
Uncoated - 2, 3 or 4 rods
Coated (PTFE) - 2, 3 or 4 rods
Uncoated - 2, 3 or 4 rods
Coated (PTFE) - 2, 3 or 4 rods
Approval
4´ digit
3A
3A
Amplifier
Without amplifier
With built-in amplifier LKP100, Note {1}
6´ digit
Rod # 1 (cm) Specification is mandatory
As customers specification (max. 200cm)
7´...9´ digit
Rod # 2 (cm) Specification is mandatory
As customers specification (max. 200cm)
10´...12´ digit
Rod # 3 (cm) Specify if relevant
As customers specification (max. 200cm)
(13´...15´ digit )
Rod # 4 (cm) Specify if relevant
As customers specification (max. 200cm)
(16´...18 digit)
Gland
Cable gland, M16
Plug, M12 (2- or 3 rod models only)
19´ digit
1
2
3
4
0
1
xxx
xxx
xxx
xxx
1
2
Note
{1} Only available for a 2-rod sensor mounted in a non-conducting
tank, where one rod is used for ground potential.
Accessories
3.1 material certificate, type number 5509-227
Double level control module DNGA 230100 (separate data sheet)
Refer to the “Accessories” data sheet for a full range of welding parts,
adapters, etc.
3A Approval
The LSK 35x and LSK 45x are approved by 3A providing it is mounted
in a 3A approved counter part and installed according to the guidelines
given in the installation manual.
The 3A approved products fulfill the FDA demands and follow the
EHEDG guidelines regarding design, materials and finishing.
Refer to the 3A marked counter parts in the data sheet “Accessories”.
PEEK natura
Angle > 135 deg.
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Design and specifications subject to change without notice
Data Sheet LSK-2
Page 3
UK/2007-10-02 This data sheet may only be reproduced in full.
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Design and specifications subject to change without notice
Data Sheet LSK-2
Page 4