AO-BH-90M Single Gas Detector




The BH-90M is a single gas detector with industrial-grade sensors and microcontrol technology, offering fast response and high accuracy. Compact, durable, waterproof, and explosion-proof. Ideal for industrial and rescue environments.

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The BH-90M single gas detector adopts industrial-grade sensors and microcontrol technology, with fast response, high measurement accuracy, good stability, and repeatability. The overall performance of the device is at the forefront of the industry and easy to operate. The main design inspiration comes from pebbles, and the full-body design avoids the appearance of edges and corners as much as possible, making it compact and durable. The shell is made of high-strength engineering plastic and composite anti-slip rubber, with high strength, good hand feel, waterproof, dustproof, and explosion-proof.

Widely used in explosion-proof environments, toxic gas leakage rescue, underground pipelines, mines, metallurgy, power plants, chemicals, tunnels, and other places, effectively preventing poisoning accidents and ensuring the safety of workers and production equipment from being damaged.


  • Industrial sensor
  • Sound, light, and vibration alarm methods
  • Type-C interface
  • Chinese and English switching
  • Quick response
  • Three-defense design
Alarm method Sound, light, and vibration
Sampling method Diffusion
Display LCD display screen
Condition -10~55℃,≤95%RH
Power supply 3.7V rechargeable battery
Protection grade IP65
Charging time 4~6h
Ex-protection Ex ib llC T4 Gb
Working time ≥8h
Dimensions 114*60*43mm
CO 0-1000ppm 1ppm 50ppm 150ppm
O2 0-30%vol 0.1%vol 19.5%vol 23.5%vol
H2 0-1000ppm 1ppm 50ppm 150ppm
H2S 0-100ppm 0.1ppm 10ppm 20ppm
CH4 0-100%LEL 1%lel 20%LEL 50%LEL
C2H4O 0-100ppm 1/0.1ppm 20ppm 50ppm
EX 0-100%LEL 1%lel/1%vol 20%LEL 50%LEL
C3H8 0-100%LEL 1%lel/1%vol 20%LEL 50%LEL
C2H5OH 0-100%LEL 1%lel/1%vol 20%LEL 50%LEL
NH3 0-100ppm 0.1/1ppm 20ppm 50ppm
CL2 0-20ppm 0.1ppm 5ppm 10ppm
O3 0-10ppm 0.1ppm 2ppm 5ppm
SO2 0-20ppm 0.1/1ppm 5ppm 10ppm
PH3 0-20ppm 0.1ppm 5ppm 10ppm
CO2 0-5000ppm 1ppm/0.1%vol 1000ppm 2000ppm
NO 0-250ppm 1ppm 50ppm 150ppm
NO2 0-20ppm 0.1ppm 5ppm 10ppm
HCN 0-50ppm 0.1/0.01ppm 10ppm 20ppm
HCL 0-20ppm 0.001/0.1ppm 5ppm 10ppm
CH2O 0-20ppm 1/0.1ppm 5ppm 10ppm
HF 0-100ppm 0.01/0.1ppm 2ppm 5ppm
C7H8/C8H10 0-20ppm 0.01/0.1ppm 5ppm 10ppm

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