Leak and Flood Detection

Description and Purpose

The Leak Sensor is a device that detects when non-flammable liquid puddles in a protected area, or when liquids reach a certain level in a tank or drip pan.  When water or other non-flammable liquid puddles, the sensor sends status data to the control panel indicating the undesired condition. Likewise, when the area is dry, the sensor sends data to the control panel associated with the normal status. Users see status and alarms from the sensor at the local keypad. The control panel can also send a message to the monitoring station.

The leak sensor is useful in computer rooms, basements with sump pumps, in areas around plumbing, kitchen areas, drip pans for water heaters, refrigeration, and air conditioning ductwork, around water tanks, or other containment equipment that should normally be dry.

 
Reasons to Choose this Sensor

The Leak Sensor provides some important advantages.

Cabling requirements are minimized because the sensor cable need not be individually routed to the control panel. The sensor cable is an addressable bus that allows connection to many devices before cabling and connecting to the control panel for processing.

The sensor is protected against transients, helping the sensor to overcome voltage spikes causes by lightning or misconnections.

Figure 1: Routing the
V-Plex™ Bus to Leak and Flood Sensor

 

Connections and Considerations

The table below refers to the drawing in Figure 1. If you are using this document on line, click the model number in the table below to see more information.

Item

Model No.

Description

Mounting Options

Notes

Hw

470

Water Detector

 

 

B

4193SN

Adapter: Serial Interface Module

Inside of monitored device.

 

O12

AD25624

Power Supply (DC Voltage indicated)

In enclosure
(#1451-24)

Selectable 12VDC or 24VDC operation when using XF30 transformer.

V

V-Plex

V-Plex™ Data Bus

 

Connects to addressable devices, zone input devices and relay modules.

Y

Genesis:
4506

2-wire, 18 AWG, Fire rated, Non-shielded

Use Genesis 1118 for Non-Fire Applications

This part number is an example. See your building and electrical codes for actual jacketing requirements.

 

Design Considerations

The Leak Sensor shall be mounted on a flat surface at a location and level where pooling or the water level is considered unacceptable.

Route the specified cable from the control panel location, or from the nearest V-Plex device to the sensor. If more detection devices are needed, continue routing the V-Plex bus on to other device locations.