Water Leak
Detection Systems

Water Leak Detection Equipment 5 to 8 Zones – Type LD8-2 and LD8-2V

Application of LD8-2 Water Leak Detection Equipment

We have designed the LD8-2 Water Leak Detection Equipment to monitor leaks in up to eight independent zones. Suitable for residential and industrial areas such as tea points, server rooms, basements and office blocks. This leak detection alarm shares similarities with our one to two zone (type LD2-3) and three to four zone (type LD4-2). The main difference is that this water leak detection equipment can detect water leaks in up to eight individual zones. This feature makes it an ideal solution for detecting water leaks in buildings with multiple areas.

How LD8-2 Water Leak Detector Works: Advanced Features for Effective Water Damage Prevention

Our water leak sensors boast a unique feature that sets them apart from the competition—they employ a bi-directional (AC) signal. By doing so, these sensors significantly extend their lifespan by preventing electrolysis and degradation of the water leak detection sensors. Curious about the risks associated with low-quality water detection cables? Gain valuable insights by reading our informative blog post on ‘Warning: Cheap Water Detection Cable from China.’

Upon detecting a water leak, the LD8-2 display will flash, indicating the precise location of the leak. Additionally, an audible warning device will activate, and the common alarm relay will close. Even after removing the water from the sensor, the unit will continue to operate in this alert state. To silence the alarm, simply mute the sounder, which will simultaneously stop the display from flashing.

Advantages of using the LD8-2 Water Leak Detector: Effortless Leak Identification

Water leak detection has never been easier, thanks to the LD8-2 large graphic touch screen. The Alarm panel display is very user-friendly. This makes it very easy to identify which zone has a water leak or a sensor fault.

Moreover, the LD8-2 includes a cable fault alarm feature. Any disconnection between the sensors and the controller will trigger a “Sensor Fault” alarm, ensuring you stay informed and prepared.

Each zone can accommodate a range of spot sensors or up to 50 meters of linear water detection cable. Furthermore, the standard configuration includes monitoring of the interconnecting cable between the sensors and the control unit.

To provide optimal customization, we have equipped each zone with a sensitivity potentiometer. This allows you to adjust the sensitivity of individual zones based on your specific requirements. Increase the sensitivity for areas that require extra vigilance, or decrease it for locations with high humidity or water splashes.

The unit also offers a common alarm set of volt-free contacts, allowing seamless integration with Building Management Systems (BMS) and PLC.

Our LD8-2 water detection alarm offers optional battery backup, providing uninterrupted operation during power outages. It also features outputs for connecting to flashing and audible beacons and SMS text messaging units.

Choose the LD8-2 water detection alarm for superior leak detection capabilities and comprehensive protection against water damage. Invest in a solution that combines cutting-edge technology, user-friendly features, and advanced customization options.

Optional Equipment
Beacon Sounder - for remote alarm indication Water Leak Detection Cable - to detect a leak anywhere along it's length Water Shut Off Valve - to stop a leak at it's source Water Leak Detection Spot Probe SMS Text Messaging System - sends a text to up to 3 users 12 Hour Battery Backup Repeat Alarm Unit Type SCA

LD8-2 vs. LD8-2V: A Closer Look at the Differences

If you’re seeking an added layer of control, consider the LD8-2V Water Detection Alarm. This variant includes valve control functionality. In the event of a water leak, the Alarm panel will automatically shut-off the ball-valve, effectively stopping the water supply to the affected area and preventing further damage. Additionally, an internal valve shutdown override push button enables water services to be restored while waiting for the cable to dry out.

Why we use Actuated Ball Valves

CMR Electrical were one of the first Water Leak Detection companies in the UK to use Actutated Ball Valves. Read this article to discover the Benefits of Actuated Ball Valves in water detection systems. Find out why we rarely use Solenoid Valves.

Summary of the standard features:

  • Sized at 180mm wide x 255mm high x 80mm deep.
  • Large back lit alpha numeric display
  • Internal Zone Alarm and Fault lamps
  • With the exception of mains power, all terminals are of the plug and socket type
  • Bi-directional DC signal in the sensors to stop electrolyses and polarisation
  • Individual Zone sensitivity adjustment allowing any zone to be set for high to low sensitivity
  • Monitoring of each zone cable and sensor to ensure continuity and integrity
  • On board audible warning device to alert local operators of a problem
  • Alarms latched until Mute operated to give indication of transient water leaks
  • Zone signal isolation to stop multiple alarms due to sensors coming into contact with earth

Optional features:

  • Optional water shutoff valve control with internal valve closed lights
  • Optional individual zone alarm relay contacts for onward signal to a BMS
  • Optional zone alarm water shutoff valves to turn off the water source when a leak is detected
  • Optional alarm output to a flashing Beacon or Beacon sounder.
  • Optional battery backup
  • Optional SMS text messaging to two phone numbers
  • Optional individual zone alarm relay contacts for onward signal to a BMS


Housing typeABS, colour light grey similar to RAL7035
MountingWall, flush or surface
Access into HousingBottom or bottom back
Size Standard unit180mm wide x 255mm high x 80mm deep
Input power50 Hz single phase 230VAC +10% – 6%
Burden< 4VA
Power terminationInternal 3 way terminal block
Voltage to sensorBi-directional 5VDC
Connections to sensorInternal plug-in terminal block
Common Alarm output contactsChangeover contact rated at 1 amp 30VAC/DC
Common Fault output contactsChangeover contact rated at 1 amp 30VAC/DC
Individual Alarm output contactsChangeover contacts rated at 1 amp 30VAC/DC
Display character sizeGraphic touch screen 60mm x 44mm

Data Sheet

Installation Manual

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