Mechanical Fixed-Temperature Heat Detector


  • This detector operates on the temperature differential sensing principle, with a UL approved sensor making mechanical contact. It is made of high quality material, providing excellent contact despite any environmental interference.
  • This detector is suitable for locations with high temperature differentials, such as places (kitchen, restaurant and boiler house) where there is constant use of heat.
  • This detector has passed strict quality control and repetitive testing; hence its quality is durable and highly reliable.
  • Through its professional design, the heat collector can accelerate its response rate after being heated, and has a protective device to avoid accidental response caused by distortion, bumping and dropping in order to increase the reliable product.
  • The unit is completely sealed; its function is not affected by humidity, dust or insects.



AH-9920 Mechanical Fixed-Temperature Heat Detector

Model AH-9920
Type 2 wire 3 wire 4 wire
Alarm Contact N/A   N/A 0.8A @30V DC, 0.4A @125V AC
Voltage Range 12 ~ 30V DC
Alarm Current @24V DC 470Ω 40mA 40mA 35mA
Thermal Setting 70
Ambient Temperature -10 ~ +55
Material Fire-proof plastic
Dimensions 111mm(Dia.) x 47mm(H)
Weight About 100g
Color White

Effective Alert Area

Construction/Height Under 4M 4M ~ 8M
Fire-proof Building 60 M2 30 M2
Ordinary Building 30 M2 15 M2