This Multisensor is a networkable instrument that houses both smoke and thermal sensors for monitoring the level of smoke & heat in its surveillance. Built-in sounder for warning eliminates the need for externally connected sounder. Its unique feature is to provide the live temperature and smoke level to the control panel for real time monitoring purpose. This detector with a unique ID communicates to the control panel by pin pointing its exact location.
- Built-in sounder
- Real time smoke and temperature info
- Smoke/heat sensitivity alteration from the panel
- Address can be changed from the panel
- Detailed location description settings
- Soft addressing
- Pre alarm
- Contamination alarm
- Remote test facility from the panel
- Electrical supervision
- Transient voltage protection upto 2.4KV
- Corrosion protection
- Insect-resistant screening
- Dual bi-color LED indication for 360° viewing angle
- Easy to maintain/service
What is a multisensor sensor and how does it work?
Multisensor is an instrument that houses both smoke and heat sensors for a more guaranteed fire detection.
The multisensor detector is only a measuring instrument that monitors the level of smoke and heat in its surveillance. It will raise an alarm only when the level of smoke/heat exceeds its pre-set upper limit/threshold values.
Its working functions combines optical smoke detection principle & rate of rise heat detection principle.
Photoelectric/Optical Smoke detection part work on a common light scattering principle. Multisensor detector contains a chamber that consists of a light emitter usually a LED and a light a sensitive device like a photodiode that receives all the light directly emitted by the LED.
When the smoke enters the chamber, the intensity of light received by the photodiode reduces due to density of smoke. If the intensity of received light drops below a pre-set threshold level, fire alarm is triggered confirming fire.
Further, for heat detection a thermistor device is used in the detector to monitor temperature levels. The resistance offered by the thermistor device decreases with increase in heat sensed by it, thereby increasing the values of voltage and current drawn by the circuit. Detector's intelligence algorithm monitors the difference in voltage values at continuous intervals of time. The higher the difference in voltage, the higher the increase in heat.
In case of fire, the rise in temperature is rapid. Meaning, in less time the difference in temperature measured is very high. This parameter of rate of rise in heat is considered to raise an alarm confirming presence of fire.
Alarm is also raised when the live temperature exceeds the pre-set upper limit/threshold values of the detector.
Unit of measure for level of smoke is Obscuration/foot (Obs/ft). Similarly, Celsius is the preferred unit for measuring heat levels.
Multisensors provide more reliable fire warnings by responding quickly to smouldering fires.
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