Water Leak Alarm/Detector
61F-WLA/-GPN-V50
CSM_61F-WLA_61F-GPN-V50_DS_E_5_4
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
predicted water leakage, degree of overflow, water quality, or
surrounding 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.
Note:
Manufacturing of the 61F-WLA was discontinued at the
end of September 2016.
Ordering Information
Water Leak Alarm
Water Leak Detector
61F-WLA *
61F-GPN-V50
When ordering, to complete the part number, be sure to specify the
desired operating voltage.
Example: 61F-WLA [120/240 VAC]
Desired supply voltage
* Manufacturing was discontinued at the end of September 2016.
Specifications
■
Ratings/Characteristics
Item
Model
Supply voltage
Operating voltage range
Interelectrode voltage
Operating current
Power consumption
Sensitivity
Sensitivity error
Contact ratings
Indicator
Alarm buzzer
Test switch
Ambient temperature
Ambient humidity
Accessories
Approved standards
61F-WLA
110/220, 120/240 VAC
85% to 110% of rated voltage
24 VAC
3 mA (AC) max.
8.0 VA max.
Variable (0 to 50 kΩ)
Scale 0: 0 to 10 kΩ *1
Scale 50: 50
±10
kΩ
3 A 250 VAC, SPDT cosφ=1
1 A 250 VAC, SPDT cosφ=0.4
Provided (Power and Leak indicators)
Provided
Provided
–10 to 50°C
45% to 85%
Hold-down clip PFC-N8 *2
–
UL508
CSA C22.2 No.14
EN61010-1
EN61326-1
Industrial electromagnetic environment
3 A 250 VAC, DPDT cosφ=1
1 A 250 VAC, DPDT cosφ=0.4
Provided (Operation indicator)
Not provided
Not provided
3.2 VA max.
Water Leak Alarm
Water Leak Detector
61F-GPN-V50
24, 110, 120, 220, 230, 240 VAC
*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.
1
61F-WLA/-GPN-V50
Operation
■
Internal Circuit
Connections
61F-WLA Water Leak Alarm
Fuse
0V
Power
supply
LED
Rectification/
24V
smoothing
circuit
Alarm LED
Level
detection
switching
circuit
Amplification
circuit
X
BZ
Alarm buzzer
110, 120V
Rectification/
24V
smoothing
circuit
220, 240V
Test switch
X/C
VR
S
0
S
1
S
2
Tc
Tb
Ta
E
0
E
1
110/120VAC
220/240VAC
Sensing Band
61F-GPN-V50 Water Leak Detector
Rectifier/
smoothing
circuit
Level
detector
switching
circuit
24 VAC
Amplifier
AC power source
Rectifier/
smoothing
circuit
Sensitivity
adjuster
Relay
24 VAC
Sensing Band
61F-GPN-V50 Water Leak Detector
To Sensing
Band
Bottom view
AC power source
2
61F-WLA/-GPN-V50
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)
Core
Core
Liquid
Sensing Band Protective Cover
Item
Appearance
F03-25
F03-26PES
Suggested use
Construction
Adhesive
Adhesive
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.
3
61F-WLA/-GPN-V50
Dimensions
Note:
All units are in millimeters unless otherwise indicated.
61F-WLA Water Leak Alarm
Three, M5 or 6-dia.
mounting holes
61F-GPN-V50 Water Leak Detector
■
Accessories (Order Separately)
Connecting Sockets (for 61F-GPN-V50 Water Leak Detector)
PF113A-E Track-mounted Socket
Eleven, M3.5 x 5
sems screws
Top view
61F-
GPN-V50
Two, M4 or 4.5 dia. holes
52 max.
34±0.2
31 max.
PF113A-E
PFC-N8 Holding
Bracket
PL11 Back-connecting Socket
Two, 2 dia.
holes
Two, 3.5 dia. or M3
mounting holes
61-
GPN-V50
31 dia. hole
51 max.
30 dia.
Approx. 75
35 max.
Approx. 20.5
PL11
Approx. 16
Important:
Install the
Water
Leak Detector socket
with
the keyway facing down.
Sensing Band
F03-15
Crimped electrode pair Stainless steel core
(0.3 x 12
braided)
Sheath: Transparent
vinyl
chloride
Core: Stainless steel SUS304
F03-16PE
8
1.2
1.7
4
Transparent
vinyl
chloride
333 mm
(3 electrode pairs per meter)
20
4
Sheath: Transparent
vinyl
chloride
Core: Stainless steel SUS316
Detecting
section
Polyethylene
4
61F-WLA/-GPN-V50
Safety Precautions
!WARNING
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.
!CAUTION
Do not attempt to disassemble, repair, or modify the
product. Doing so may occasionally result in minor or
moderate injury due to electric shock.
■
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.
Place the Sensing Band at a location where water leakage is
most likely to occur. For example, consider the following loca-
tions:
(2)
•
•
•
•
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.
IV Cable
0m
10 to 150 m
200 to 300 m
350 to 400 m
Note:
IV cable: 2 mm
2
200 m
150 m
100 m
50 m
Sensing Band
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
In the interest of product improvement, specifications are subject to change without notice.
5
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