One & Two zone optical detection of water leaks with audible warning, visual indication, Mute alarm push button and alarm relay for onward signalling. Both floor standing or wall mounted sensor are available. Used for drip trays bunded areas or dirty areas where detection cable would get damaged.
This unit has been designed to detect water using optical spot sensors in areas such as sump tanks, bunded areas, trip trays etc. where dirt or dampness can accumulate.
Sensor
The mode of operation is the principle of total internal reflection. An LED and photo-transistor are housed in a plastic (Polysulfone) dome. When no water is present, light from the LED is internally reflected from the dome to the photo-transistor. When water comes into contact with the dome, the effective refractive index at the dome-water boundary changes allowing some light from the LED to escape. Thus the amount of light received by the photo-transistor is reduced indicating the presents of water.
Features
All of the information below is available in our OLS optical water alarm pdf data sheet.
The unit has been designed to monitor critical areas for water leaks via remote optical sensors. Up to two sensors can be connected to a zone.
The unit as standard includes an audible warning device, mute push button, flashing 8mm red alarm lamp and 8mm Control live green lamp.
Once a water alarm has been raised, the units red “Alarm” lamp will start to flash and the audible warning device will start. The unit will remain in this condition even if the water is removed from the sensor. Only muting the alarm will stop the sounder and de-latch the alarm. If water has been removed from the sensor before pressing the “Mute Alarm” button the alarm lamp will extinguish indicating that no water is present. However if water is still being detected only the audible warning will stop leaving the lamp permanently on. Only when the water has been removed will the lamp extinguish.
The unit has a common alarm set of volt free contacts for onward signalling to Building Management Systems, telephone diallers water valves or control systems.
Sensor
The mode of operation is the principle of total internal reflection. An LED and photo-transistor are housed in a plastic (Polysulfone) dome. When no oil is present, light from the LED is internally reflected from the dome to the photo-transistor. When oil covers the dome, the effective refractive index at the dome-oil boundary changes allowing some light from the LED to escape. Thus the amount of light received by the photo-transistor is reduced indicating the presents of oil
Features
Beacon for remote indication of an alarm
This 12VDC Flashing beacon can be used to advise of an alarm were noise is an issue such as hospital corridors or noisy environments.
SMS Text Messaging alert unit
For unmanned areas or to advise maintenance staff of a problem. With the addition of our SMS Text Messaging alert unit, an alarm will also be sent in text form to one or two phones. This unit is usually added where the alarm unit is mounted remote from maintenance staff, or in unmanned areas.
Water Valve
Water Valves to turn off the water supply when a water leak is detected 230VAC power open, slam shut water valves can be provided from ¼” to 2” BSP sizes. Pipe couplers are also available on request.
AS2 Remote Repeat Alarm
This unit can be fitted to remote areas such as reception areas maintenance rooms or corridors were visual and audible warnings are required.
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