Condensed Water From Commercial Laundry Dryers are - Digi-Key

Condensed Water From Commercial Laundry Dryers are
Controlled by Reed Sensor
REED RELAYS REED SENSORS REED SWITCHES
Introduction
Commercial laundry operations have several washer and dryer units to typically
handle several customers at once. The dryers by their very nature dry the wet
clothes by heating them with gas or electricity. The water is vaporized and must
then be carried out of the dryer compartment to rid the moisture. Most times it’s
not convenient to simply vent the vapor directly to the outside air. MEDER’s
reed sensors play a direct role in solving this problem.
Figure 1. MK17-x-3 physical layout
Features
• Magnet and Reed Sensor are isolated and
have no physical contact by typically having
the magnet mounted to a float and the Reed
Sensor is mounted on the body of the casing
close to the high point of the water and
positioned to accurately pick up the magnetic
field from the magnet in the float.
Figure 2. Condensation line drains into a reservoir with built in pump containing a level
sensor.
• The reed switch used in the Reed Sensor is
hermetically sealed and is therefore not
sensitive to rough, wet, moist environments
• The magnet is not affected by its environment
• Tens of millions of reliable operations
• Surface mount and through hole packages
available
• Cylindrical hole and screw fastening mounting
• Contacts dynamically tested
Applications
• Ideal for sensing the water level in commercial
clothes dryers
• Ideal for applications sensing any kind of liquid
level in a host of different configurations
Figure 3. When the condensation reaches a high level the reed switch activates a pump
which drains the water.
Condensed Water’s Max
Max Limit in Commercial Clothes Dryers
is Sensed by Reed Sensors
Commercial laundromats are used extensively around the world and are
typically open 24 hours a day. Multiple commercial clothes dryers are constantly
in use. Because most of the time it is inconvenient to vent the water vapor
generated in the clothes dryer directly to the outside air, the vapor is passed
through a condenser. The condenser condenses the water vapor into a storage
tank. The water level in then monitored using reed sensors.
MEDER electronic
Application
MEDER electronic AG | Germany | tel.: +49(0)7731/8399-0 | Email: info@meder.com
MEDER electronic Inc. | USA | tel.: +1 508.295.0771 | Email: salesusa@meder.com
Page 1 of 3
www.meder.com
Condensed Water From Commercial Laundry Dryers are
Controlled by Reed Sensor
REED RELAYS REED SENSORS REED SWITCHES
Specifications
Operate specs
Min Max Units
Must close distance
5
25
mm
Must open distance
5
25
mm
Hysteresis
Load Characteristics
Switching voltage
Switching current
Carry current
Contact rating
Static Contact resistance
Dynamic contact
resistance
Breakdown voltage
Operate time
Release time
Operate Temp (MK6)
Storage Temp (MK6)
Operate Temp (MK15)
Storage Temp (MK15)
Typical 50%
Min Max Units
200
0.5
1.5
10
150
200
320
-20
-35
-20
-35
0.5
0.1
85
85
130
130
Volts
Amps
Amps
Watts
mΩ
mΩ
Volts
msec
msec
°C
°C
°C
°C
A magnet is generally mounted in a float that rides up and down with the water
level in the storage tank or reservoir. As the water level reaches the upper limit,
MEDER’s reed sensor, which is conveniently positioned near the top of the
reservoir, will sense this high water mark. Once this high water level is reached
the reed sensor will switch on a water pump, allowing water to be emptied
automatically, pumping directly into a water drain system. Having a pump that
only turns on when the storage tank is full is very energy efficient, compared to
having the pump running all the time.
The reed sensor is an excellent choice because it can operate reliably over a
wide temperature range, and represents an economical way to carry out the
sensing function. Because MEDER’s sensors use hermetically sealed reed
switches that are further packaged in strong high strength plastic, they can be
subject to rough treatment and environmental concerns such as spillage water,
and moisture without any loss of reliability.
MEDER’s sensors are packaged for surface mounting as well as through hole
mounting. Also, MEDER has cylinder packages and well as screw fastening
packages having lead wires for remote attachment to the electronics.
Surface Mount Series
Series
MK15
MK16
MK17
MK22
MK23MK23-35
MK23MK23-66
MK23MK23-87
MK23MK23-90
Dimensions
Dimensions
mm
W
2.5
H
2.5
L
19.50
W
2.3
H
2.3
L
15.60
W
2.1
H
2.1
L
9.61
W
2.7
H
2.3
L
15.60
W
2.2
H
1.95
L
15.75
W
2.2
H
2.7
L
19.60
W
2.0
H
2.1
L
15.60
W
2.54
H
3.05
L
24.9
Illustration
inches
0.098
0.098
0.768
0.091
0.091
0.614
0.083
0.083
0.378
1.060
0.091
0.614
0.087
0.077
0.620
0.087
1.060
0.772
0.079
0.083
0.614
0.100
0.120
0.980
MEDER electronic
Application
MEDER electronic AG | Germany | tel.: +49(0)7731/8399-0 | Email: info@meder.com
MEDER electronic Inc. | USA | tel.: +1 508.295.0771 | Email: salesusa@meder.com
Page 2 of 3
www.meder.com
Condensed Water From Commercial Laundry Dryers are
Controlled by Reed Sensor
REED RELAYS REED SENSORS REED SWITCHES
Through Hole Series
Series
MK06MK06-4
MK06MK06-5
MK06MK06-6
MK06MK06-7
Dimensions
mm
W
3.3
H
3.3
L
12.06
W
2.8
H
3.2
L
14.30
W
3.3
H
4.2
L
17.24
W
3.3
H
4.2
L
19.78
Illustration
inches
0.130
0.130
0.475
0.110
0.126
0.563
0.130
0.165
0.679
0.130
0.165
0.779
Cylindrical Panel Mount Series
Series
MK03
MK03
Dimensions
mm
Dia
5.25
L
25.5
Illustration
inches
0.207
1.004
MK14
MK14
Dia
L
4
25.5
0.157
1.004
MK18
MK18
Dia
L
5
17
0.197
0.669
MK20/1
MK20/1
Dia
L
2.72
10
0.107
0.394
Rectangular Screw Flange Mount Series
Series
MK04
MK05
MK05
MK12
MK12
Dimensions
mm
W
13.9
H
5.9
L
23.0
W
19.6
H
6.1
L
23.2
W
H
L
14.9
6.9
32.0
Illustration
inches
0.547
0.232
0.906
0.772
0.240
0.913
0.587
0.272
1.260
**Consult
our factory for your specific design requirements.
**
MEDER electronic
Application
MEDER electronic AG | Germany | tel.: +49(0)7731/8399-0 | Email: info@meder.com
MEDER electronic Inc. | USA | tel.: +1 508.295.0771 | Email: salesusa@meder.com
Page 3 of 3
www.meder.com