CSM_61F-WLA_61F-GPN-V50_DS_E_5_1
1
Water Leak Alarm/Detector
61F-WLA/-GPN-V50
Flexible Setup according to Water Quality
and Surrounding Wiring Conditions
• The operating resistance has a variable sensitivity from 0 to
50 kΩ, so the best set values can be made according to the pre-
dicted water leakage, degree of overflow, water quality, or sur-
rounding wiring conditions.
• The power supplied to the Sensing Band is 24 VAC, so opera-
tion is stable because there is no electrode deterioration from
electrical corrosion.
• A contact signal output enables monitoring from remote loca-
tions.
Refer to Safety Precautions for Floatless Level
Controllers.
[Reference]
For detecting leakage of water with high resistivity, use K7L-U/-UD ultra
high-sensitivity models.
Ordering Information
When ordering, to complete the part number, be sure to specify the
desired operating voltage.
Specifications
■Ratings/Characteristics
*1 The Detector may not operate around the setting value of “0.” Adjust the sensitivity depending on the actual application.
*2 Hold-down clip PFC-N8 is attached only 61F-GPN-V50.
Water Leak Alarm 61F-WLA
Water Leak Detector 61F-GPN-V50
Example: 61F-WLA [120/240 VAC]
Desired supply voltage
Item Water Leak Alarm Water Leak Detector
Model 61F-WLA 61F-GPN-V50
Supply voltage 110/220, 120/240 VAC 24, 110, 120, 220, 230, 240 VAC
Interelectrode voltage 24 VAC
Operating current 3 mA (AC) max.
Power consumption 8.0 VA max. 3.2 VA max.
Sensitivity Variable (0 to 50 kΩ)
Sensitivity error Scale 0: 0 to 10 kΩ *1
Scale 50: 50 ±10 kΩ
Contact ratings 3 A 250 VAC, SPDT cosφ=1
1 A 250 VAC, SPDT cosφ=0.4
3 A 250 VAC, DPDT cosφ=1
1 A 250 VAC, DPDT cosφ=0.4
Indicator Provided (Power and Leak indicators) Provided (Operation indicator)
Alarm buzzer Provided Not provided
Test switch Provided Not provided
Ambient temperature –10 to 50°C
Ambient humidity 45% to 85%
Accessories Hold-down clip PFC-N8 *2
61F-WLA/-GPN-V50
2
Operation
■Internal Circuit
Connections
S
0
S
1
S
2
Tc Tb
X
24V
0V
110, 120V
220, 240V
24V
BZ
Ta E
0
E
1
X/C VR
61
F
-
WLA
W
ater
L
ea
k
Al
arm
Fuse
110/120VAC
Alarm buzzer
Alarm LED
Amplification
circuit
Level
detection
switching
circuit
Power
supply
LED
Test switch
Sensing Band
Rectification/
smoothing
circuit
Rectification/
smoothing
circuit
220/240VAC
AC power source
24 VAC
24 VAC
Rectifier/
smoothing
circuit
Rectifier/
smoothing
circuit
Sensitivity
adjuster
Level
detector
switching
circuit
Amplifier
Relay
Sensing Band
61F-GPN-V50 Water Leak Detector
61F-GPN-V50 Water Leak Detector
To Sensing
Band
Bottom view
AC power source
61F-WLA/-GPN-V50
3
Operating Principle
When the two conductive cores of the Sensing Band are contacted
by a liquid, a weak alternating current (as small as 3 mA max.) flows
across the cores. This current is amplified to operate a relay.
In practice, leakage will be detected if water drops are present
between the core wire and the Electrode (F03-15 Sensing Band) or
detecting section (F03-16PE Sensing Band). (Refer to the specifica-
tions on page 4)
Sensing Band Protective Cover
Liquid
Core
Core
Item F03-25 F03-26PES
Appearance
Suggested use
Construction
Comments Secures the F03-15 Sensing Band to the floor sur-
face. Attach the sticker on a smooth surface. To at-
tach it on a concrete floor, use a concrete bonding
agent.
Secures the F03-16PE Sensing Band to the floor sur-
face. Attach the sticker on a smooth surface. To at-
tach it on a concrete floor, use a concrete bonding
agent.
Adhesive
Adhesive
61F-WLA/-GPN-V50
4
Dimensions
Note: All units are in millimeters unless otherwise indicated.
■Accessories (Order Separately)
Connecting Sockets (for 61F-GPN-V50 Water Leak Detector)
PF113A-E Track-mounted Socket
PL11 Back-connecting Socket
Sensing Band
61F-WLA Water Leak Alarm
61F-GPN-V50 Water Leak Detector
Three, M5 or 6-dia.
mounting holes
Top view
61F-
GPN-V50
PF113A-E
PFC-N8 Holding
Bracket
34±0.2
Eleven, M3.5 x 5
sems screws
52 max.
31 max.
Two, M4 or 4.5 dia. holes
35 max. Approx. 20.5
Two, 2 dia.
holes
Two, 3.5 dia. or M3
mounting holes
31 dia. hole
51 max.
61-
GPN-V50
Approx. 16
Approx. 75
Important: Install the Water Leak Detector socket with the keyway facing down.
PL11
30 dia.
F03-15
F03-16PE
Sheath: Transparent vinyl chloride
Core: Stainless steel SUS304
Sheath: Transparent vinyl chloride
Core: Stainless steel SUS316
Crimped electrode pair Stainless steel core
(0.3 x 12 braided)
Transparent vinyl chloride
333 mm
(3 electrode pairs per meter)
20 4
1.2
1.7
84
Detecting
section
Polyethylene
61F-WLA/-GPN-V50
5
Safety Precautions
!WARNING
!CAUTION
■Precautions for Safe Use
(1) Use only F03-15 or F03-16 Sensing Band. Other water conduc-
tors may cause the Water Leak Alarm/Detector to malfunction,
or not operate at all because of mismatched sensitivity.
(2) Place the Sensing Band at a location where water leakage is
most likely to occur. For example, consider the following loca-
tions:
•Under a raised floor; on the highest floor of a building; on the ceiling
•In the vicinity of an air conditioner, or on the floor near a humidifier
•On the floor near a feed-water pipe, conduit; hot-water pipe.
•On top of a power, or control panel
(3) Secure the Sensing Band so that they touch the floor surface or
the wall near a pipe arrangement. Cover the Sensing Band with a
F03-25 or F03-26 Protective Cover if they are installed at a loca-
tion crowed with people. However, place the cover such a manner
that water can easily reach the Sensing Band.
(4) Keep the temperature at the installation site to within 55°C. Do
not install the Water Leak Alarm/Detector/Sensing Band in the
proximity of heat-generating equipment (such as that having a
coil or wire winding). Also, do not use it in a highly humid loca-
tion, or at a location that is subjected to corrosive gases. Do not
place the Water Leak Alarm/Detector side-by-side with a high-
capacity contactor that produces an inrush current when it oper-
ates, as such arrangement may cause chattering to occur, con-
sequently causing a malfunction of the Water Leak Alarm/
Detector.
(5) Wiring distance of the Sensing Band varies depending on the
water quality. When using IV cables, wire the Sensing Band to
the length specified in the following table.
(6) Mount the 61F-WLA Water Leak Alarm/Detector on a sturdy wall
surface which is not subjected to vibration or shock. Do not use
double-sided adhesive tape, otherwise, the Detector may detach
when the adhesive tape deteriorates due to aging.
(7) When wiring the Sensor on conductive objects like metal objects,
use the F03-16.
(8) When measuring insulation resistance, do not conduct a megger
test between the electrode terminals.
Note: IV cable: 2 mm2
Do not touch the terminals while power is being supplied.
Doing so may possibly result in electric shock. Make sure
that the terminal cover is installed before using the
product.
Do not attempt to disassemble, repair, or modify the
product. Doing so may occasionally result in minor or
moderate injury due to electric shock.
IV Cable Sensing Band
0 m 200 m
10 to 150 m 150 m
200 to 300 m 100 m
350 to 400 m 50 m
In the interest of product improvement, specifications are subject to change without notice.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
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Change in Specifications.
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
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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.
2014.1
In the interest of product improvement, specifications are subject to change without notice.
OMRON Corporation
Industrial Automation Company
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2014 All Right Reserved.
