Function and purpose
Product page: https://vutlan.com/analog-sensors/91-vt591-leak-sensor.html
Datasheet page: https://vutlan.atlassian.net/l/cp/FxCBogKP
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The VT591 Water Leak Sensor is designed to detect water leaks by sensing a drop in resistance along the connected WLC Water Leak Cable. This sensor requires the use of a WLC Leak Cable, which is ordered separately and available in various lengths to suit different installation needs.
The WLC Leak Cable is designed to provide comprehensive coverage for leak detection across large areas, such as under-raised floors in data centers or around sensitive equipment. It can be laid out to cover the entire perimeter of a room or specific areas that are vulnerable to leaks. By positioning the cable along the edges of the floor, near water pipes, HVAC systems, or around server racks, the cable ensures that even small amounts of moisture are detected anywhere within the monitored zone.
This flexibility allows the WLC cable to create a continuous detection loop, covering the full floor perimeter, and making it ideal for large spaces. It offers protection by providing alerts as soon as water is detected, minimizing the risk of damage to critical infrastructure
The VT591 can be connected to any analog port (A1...A8) of the Vutlan monitoring unit, enabling real-time detection and alerts in the event of a water leak. For larger installations, the number of connected sensors and overall system length can be expanded using the VT408 Sensor Extension Unit, ensuring flexible coverage of areas prone to leaks.
This sensor is ideal for preventing water damage in data centers, server rooms, and other critical facilities where early leak detection is essential.
 | "WLC / Water leak cable" is ordered separately! When water is in contact with the detection cable, a resistive sensor indicates the emergence of moisture. The whole area can be effectively monitored by placing the cable near or with possible flood sources. |
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Used for
The VT591 Water Leak Sensor is used for:
Water Leak Detection: Monitors for water leaks in critical environments such as data centers, server rooms, and building facilities. It detects water by sensing a drop in resistance along the connected WLC Water Leak Cable.
Early Warning Systems: Provides real-time alerts when a leak is detected, helping to prevent water damage to equipment, infrastructure, or sensitive areas by enabling rapid response.
Flexible Installation: Can be installed along pipelines, around sensitive equipment, or in areas prone to flooding. The connected WLC Water Leak Cable can be ordered in different lengths, allowing the sensor to monitor large or hard-to-reach areas.
Integration with Monitoring Systems: It connects easily to any Vutlan monitoring unit, and the number of sensors can be expanded using the VT408 Sensor Extension Unit, making it suitable for large-scale installations.
This sensor is essential for preventing water-related damage in mission-critical environments.Order options
If you need 18m WLC cable, you can connect together WLC3 + WLC15.
Model | Description |
|---|---|
WLC3 | WLC / Leak detection cable length is 3m. |
WLC6 | WLC / Leak detection cable length is 6m. |
WLC10 | WLC / Leak detection cable length is 10m. |
WLC15 | WLC / Leak detection cable length is 15m. |
WLC25 | WLC / Leak detection cable length is 25m. |
WLC50 | WLC / Leak detection cable length is 50m. |
Dimensions
Usage examples
Technical specifications
VT591 / Water leak sensor specifications | |
|---|---|
Sensor type: | Analog sensor |
Measures: | Detects water leakage by the drop in resistance in WLC water leak cable |
Chain connection | No |
Dimensions: | 60×18×18 mm |
Weight: | 60 g |
Inputs: | 2 wire (WLC cable) |
Outputs: | RJ11/RJ12 (6p4c) |
Operating temperature: | -10 °C to +80 °C |
Operating humidity: | 5% to 95% (Non-Condensing) |
Mounting: | Screw and sticker included. |
Power consumption: | 60mW |
Max. distance: | 100 m from the monitoring or extension unit |
Response time: | 15 sec., |
Recovery time: | Depends on how fast the sensor dries out |
Manufactured in: | Slovak Republic, E.U. |
HS Code: | 9025 80 400 |
GTIN | 8588009886211 |
WLC / Water leak cable specifications | |
|---|---|
Description | WLC can work in high humidity, pollution, and hazardous waste |
Detectable liquids | Clean, polluted & distilled water; acids; alkalis; alcohols, and other electrically conductive liquid |
Diameter | 6.5 mm in diameter |
Lengths | Order options include 3m, 6m, 10m, 15m, 25m, 50m, or custom length. |
Weight | 36 g/m |
Operating humidity | 0% - 95 % |
Max. storage temperature | 75°C |
Max. cable length | 100 m |
Outputs | x2 wires |
HS code: | 8544 42 10 |
GTIN: | 3m 8588009886396, 6m 8588009886433, 10m 8588009886402, 15m 8588009886419, 25m 8588009886440, 50m 8588009886426, |
Package content VT591
Included page https://vutlan.atlassian.net/wiki/spaces/DEN/pages/232259595/VT591+package+content
Package includes:
Package content | Description | Quantity | |
|---|---|---|---|
1 | (2).jpg?version=1&modificationDate=1718962104496&cacheVersion=1&api=v2&width=173&height=128) | VT591 sensor | 1 pc |
2 |  | "RJ 6P4C" to "RJ 6P4C" cable 2m | 1 pc |
3 |  | Screw B4,2*16 | 1 pc |
4 |  | Sticker | 1 pc |
5 |  | Flood adapter cable | 1 pc |
Package content WLC
Included page https://vutlan.atlassian.net/wiki/spaces/DEN/pages/2921463809/WLC+package+content
Package includes:
Package content | Description | Quantity | |
|---|---|---|---|
1 |  | WLC3/WLC6/WLC10/WLC16/WLC25/WLC50 leakage cable | 1 pc |
2 |  | 4J-S sticky clamps for each 2 m of the rope. | 1 pc |
3 |  | Protective cap | 1 pc |
Connecting WLC / Water leak cable
Do not do illustration | Description |
|---|---|
 | The cable can not touch itself. It needs to be straightened. |
Do not twist or press down the cable too much. This may lead to deformation. The cable has two sensing wires, these wires can not touch each other. | |
 | Do not put the cable on a conductive surface. |
You can cut the cable, but you need to isolate the ends so that they do not touch each other. And do not loop the cable. |
Connect the "VT591 / Water leak sensor" to the monitoring unit. The connection is plug-an-play.
Connect the terminal cable to the VT591 sensor.
Connect "WLC / Water rope" to terminal cable.
Connect any additional "WLC / Water leak cables" to each other as shown in the picture above to make a chain connection.
Wire the WLC rope around or under potentially leaking objects around the perimeter or under the raised floors.
Put a protective cap on the connector of the last WLC cable in a chain.
The sensor is ready to use.
Analog sensor connection
Page link https://vutlan.atlassian.net/wiki/spaces/DEN/pages/1016274/Analog+sensors+connection
Sensor configuration
Page link https://vutlan.atlassian.net/wiki/spaces/DEN/pages/1016314/Sensor+configuration
How to test the sensor & sensor cable
Connect the WLC cable to VT591. Connect VT591 to the analog port of the system. The sensor should appear in the Vutlan Web Interface >> “System tree” panel >> “System group” tab >> “Autodetect” sensors. Make sure that the WLC cable is straight or not contacting itself, or any conducting material. The sensor should appear in the system as “Normal” (if the behavior is set to “Normal”), which means that there’s no presence of liquid (the two yellow wires along the WLC cable are not cables shorted).
Take a rag and wet it a little. Touch the rag to both yellow ires on the WLC cable. This should shorten the contact. The VT591 sensor should change the state to “Alarm”.
Dry the cable carefully with a dry cloth.
Installation examples
Please find installation examples in our articles "Water leakage detection using cable sensor and spot sensor" and "Leak detection under raised floors in data centers".
Cable layouts
 | Cover the whole area Comprehensive protection for critical areas |
 | Cover the edge area Prevent leaks from immersing in or spreading out |
 | Covering air-conditioned areas Key protection against major leakage sources such as alr conditioners |
Cable pinouts
The sensor uses a standard Vutlan analog sensor cable(RJ11/RJ12 to RJ11/RJ12) for connecting to the monitoring unit. You can find further instructions at the Analog sensors connection
Technical support
The device does not contain any user-serviceable parts. If the power meter requires service, contact your local sales representative. Do not open the device. Opening the device voids the warranty.
Schematics / Sensitivity adjustment
You can change the R10 resistor using the following schemes.
For example, if your room has very high humidity and the cable is in an alarm state without the spilled liquid being present, you can change R10 to 270k. This should lower the sensitivity level.
Troubleshooting
The following table describes potential problems and their possible causes. It also describes checks you can perform or possible solutions for each. After referring to this table, if you cannot resolve the problem, contact your local Vutlan sales representative for assistance.
Potential Problem | Possible Cause | Possible Solution |
|---|---|---|
The data being displayed is inaccurate or not what you expect. | Incorrect setup values. | Check that You use the correct f(x) formula |
Incorrect voltage inputs. | Check power meter voltage input terminals to verify that adequate voltage is present | |
The power meter is wired improperly. | Check that all wires are connected correctly and that they are energized. See “Wiring Diagrams” of the device. | |
The sensor does not appear in the Vutlan monitoring interface | Communication lines are improperly connected. | Check the 6P4C RJ11 communication cable. |
The communication cable is inserted into the wrong port. | 6P4C RJ11 communication cable must be inserted into the analog port of the Vutlan monitoring system. | |
The sensor is always in alarm state. | The cable touches itself. | The cable can not touch itself. It needs to be straightened. Please check if the cable is bent anywhere. |
The cable is twisted or pressed down too much. | Do not twist or press down the cable too much. This may lead to deformation. The cable has two sensing wires, these wires can not touch each other. | |
The cable is located on a conductive surface. | Do not put the cable on a conductive surface. | |
The cable is damaged | Check the continuity of the cables with a multimeter. Let’s call each wire A and B: If the cable is not damaged, you should get the following results
If the cable is damaged, you will get:
or
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Copyright:
Vutlan s.r.o. (LLC)
Remote Infrastructure Monitoring and Control
43 ul.Svornosti, 821 06 Bratislava,
Slovak Republic