Conventional Heat Detector

AC103HD

Conventional Heat Detector

This Conventional Heat Detector houses a thermal sensor for monitoring the level of heat in its surveillance. It switches to alarm state when high rate of rise in heat is monitored or also when the live temperature value exceeds its pre-set threshold value. It communicates its zone number to the control panel for location tracking. 

Exclusive Features
  • Wide operating voltage
  • Faster response to smouldering firet
  • Low standby current
  • Easy to maintain/service
  • Dual bi-color LED indication for 360° viewing angle
Technical Summary
Electrical Specifications
Operating voltage : Nominal 12/24V DC
                                   Minimum 9V DC
                                   Maximum 26V DC
Quiescent current : 2.3µA
Alarm current : 25 mA at 24V
                            12 mA at 12V
 
Indications
Normal : Green LED (Blinks every 8 sec)
Alarm : Red LED (Glows steady)
 
General Specifications
Thermal sensitivity : 57ºC 
Operating temperature : 0ºC to 49ºC 
Storage temperature : 5ºC to 40ºC 
Rate Of Raise Of Temp : 11.1ºC/min(20ºF/min)
Humidity : 0-95% RH (Non-condensing)
Color : White 
Housing : Polycarbonate
Cycle Time : 4 sec
Contact Clamp : Stainless steel
 
Dimensions(DiaxH) 
Without Base : 100x30mm
With Base : 100x42mm
 
Weight
Without Base : 58g
With Base : 98g
Know More

What is a heat detector and how does it work?

Heat detector is an instrument that measures its ambient temperature. It will raise an alarm by monitoring the rate of rise of heat in its surveillance. 

Heat detector consists of a thermistor component that measures surrounding temperature. 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.  

Further, alarm is also raised when the live temperature exceeds the pre-set upper limit/threshold values of the detector. 

This detector is much more effective than fixed temperature detectors and is also unharmed by dusty or smoky environments.

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