AS105MDS
Standalone Multisensor
The primary purpose of the AS105MDS Standalone Smoke Detector is to detect the presence of smoke within its surveillance area. Once the smoke reaches the alarm threshold level, it promptly triggers the built-in sounder. Similarly, the thermal sensor measures the temperature within its surveillance area. It is capable of detecting sudden rises in temperature or abnormal temperature levels. The standalone detector doesn’t require any wiring or connection to a control panel. Additionally, this unit is battery-powered and suitable for small indoor applications where the scope of audibility needed is within the room and the neighboring room.
- Ultra smoke sensitivity
- Automatic drift compensation
- Corrosion protection
- bi-colour LED to indicate healthy and alarm condition.
- Dual LED for 360 deg viewing.
- Low battery warning
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.
others in series
Standalone Smoke Detector
Model No:AS105SDS
Standalone LPG Leak Detector
Model No:AS105LPG
