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4-Wire Fixed Temperature Heat Detector

With the model of HM-201HC-4, the 4-wire network fixed temperature heat detector exploits the thermal sensor which has high precision and reliability. When the environmental temperature goes up to the alarm threshold of 57℃ (135°F), the product is triggered to alarm, and sends the alarm signal (relay on-off signal) to the alarm controller.


In the state of alarming, the LED indicator keeps lighting. After the alarm, the 4-wire fixed temperature heat detector can automatically conduct the resetting. The resetting after power off is also available. The users can choose the appropriate mode in line with the installation environment or the requirements of their own. The relay output of the product can be normally open or normally close according to the requirements. Because the fire often causes a power outage, we suggest choosing the normally close output.

4-Wire Fixed Temperature Heat Detector

The 4-wire fixed temperature heat detector is resistant to electro-magnetic interference and radio frequency interference. Using SMT technology, it is safe and reliable with long service lifetime. The product can be compatible with any conventional fire alarm control panel in the market.


Technical Specification
Operating Voltage DC9~35V
Quiescent Current ≤12mA (Normally Closed Relay) ≤500uA (Normally Open Relay)
Alarm Current ≤10mA (Normally Closed Relay)≤ 18mA (Normally Open Relay)
Alarm Indication Red LED
Alarm Temperature 57℃ (135°F)
Working Temperature -10℃ ~ 50℃
Ambient Humidity ≤95% RH
Alarm Output Relay Output (Optional with Normally Close and Normally Open)
Relay Contact Rating 0.5A, DC28V
Detection Zone 60-80m²
Overall Dimension Ф100×55mm

Related Names
High Temperature Monitor | Interconnected Heat Alarm | Fire Safety Device


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