AO-BH-H3 Gas Alarm with shut off valve




Wall-mounted AO-BH-H3 gas alarm with shut off valve. Detects combustible and toxic gases, providing visual and audible alarms for quick and safe action.

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The AO-BH-H3 is a wall-mounted gas alarm designed to detect the concentration of combustible and toxic gases or vapors using high-quality air-sensitive components and advanced technology. It provides visual and audible signals when the gas concentration reaches the preset range, prompting you to take immediate action. We support OEM/ODM/R&D services.

Installation Instructions:

  • Fix the appliance on the wall at a horizontal distance of 2~4m from the cooker or gas source.
  • The vertical location of the appliance should be decided according to the type of gas:
    • LPG: Fix it within 0.3 meters above the ground.
    • Natural Gas: Fix it within 0.3 meters below the roof.
  • Avoid the following locations:
    • Near windows or passages with strong wind.
    • Humid places with fog or water droplets.
    • Easily polluted or high temperature environments near the oven.
    • Covered by other objects.
Model AO-BH-H3
Detecting Gas Combustible gas & CO
Sensor Type Semiconductor sensor
Gas Sampling Diffuse naturally
Alarm Set Point Combustible gas: 10%LEL / CO: 100PPM
Warming Time 3 min
Accuracy Combustible gas: ±3%LEL / CO: ±50PPM
Response Time ≦60s
Resume Automatically ≦30s
Power AC220V
Alarm Current <50mA
Power Consumption <1W
Alarm Method Visual and audible
Sound Level ≧70dB
Optional Function 220V relay, 9V pulse, relay output NO or NC
Environment Temperature: 0℃~55℃, Humidity: <95% no dew
Life 5 years (normal use)
Weight 150g
Dimensions L×B×H(mm): 108×82×49.5
Model Range L-alarm H-alarm
CO 0-1000ppm 35ppm 200ppm
O2 0-30%vol 19.5%vol 23.5%vol
H2 0-100%LEL 20%LEL 50%LEL
H2S 0-100ppm 10ppm 20ppm
CH4 0-100%LEL 20%LEL 50%LEL
C2H4O 0-20ppm 10ppm 15ppm
C2H4 0-100%LEL 20%LEL 50%LEL
C3H8 0-100%LEL 20%LEL 50%LEL
C2H5OH 0-100%LEL 20%LEL 50%LEL
NH3 0-100ppm 25ppm 50ppm
CL2 0-20ppm 5ppm 10ppm
O3 0-20ppm 5ppm 10ppm
SO2 0-20ppm 2ppm 5ppm
PH3 0-20ppm 0.3ppm 5ppm
CO2 0-50000ppm 1000ppm 2000ppm
NO 0-250ppm 20ppm 50ppm
NO2 0-20ppm 5ppm 10ppm
HCN 0-500ppm 10ppm 20ppm
HCL 0-50ppm 10ppm 20ppm
CH2O 0-10ppm 2ppm 5ppm
VOC 0-100ppm 20ppm 50ppm
C6H6 0-100ppm 20ppm -

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