BH-90A Portable Gas Detector

The BH-90A Portable Detector can make continuous detection. This high-quality sensor makes detection from natural diffusion, and has great sensitivity. The simple display makes the BH-90A incredibly easy to operate and the shell uses high strength material and anti-slip rubber, creating a detector that is water-proof and dust-proof. This device is a perfect for leak detection.

As low as $65.00
2 week lead time

The BH-90A is an excellent option when it comes to reliable and economical portable gas sensors. This sensor is capable of continually detecting multiple gases and rapidly giving you an easy-to-understand reading on the LED display screen. The BH-90A detects a wide range from Ozone's 0-20 ppm to Carbon Monoxide's 0-1000 ppm, meaning that although it may not be the most suitable option for personal, more small-scale use, it is a great option when gas detection is needed on a larger scope. The BH-90A comes with the H-Alarm and L-Alarm set at 5ppm and 10ppm, however, these alarm levels are customizable. Whether it be for pipelines, mining shafts or power plants, you can go to work with enhanced piece of mind that you and your co-workers are safe because of the BH-90A’s reliability. Adopting a sturdy and anti-slip casing, the BH-90A promises to be anti-slip and anti-dust. The ruggedness and durability this product offers ensure that it will last until the completion of it’s 2-year life-span. A reliable product that won’t break the bank, the BH-90A Portable Gas Detector is a great fit everyone. To charge the BH-90A, simply plug it into the charging cord that comes with the sensor.

The BH-90A differs from the BH-90 mainly by their battery size, the BH-90A has a slightly larger battery which allows for longer use. The BH-90A also has the option for password management to avoid wrong operation (the BH-90 does not offer this feature).


Model Range Resolution
Ozone (O3) 0-1 ppm 0.01 PPM
Ozone (O3) 0-20 ppm .1 ppm
Combustibles (EX) 0-100% LEL 1% LEL
Carbon Monoxide (CO) 0-1000 ppm 1 PPM
 Hydrogen Sulfide (H2S) 0-100 ppm 0.1 PPM
Oxygen (O2) 0-30% VOL 0.1% VOL
Ammonia (NH3) 0-100 PPM 0.1 PPM
Hydrogen (H2) 0-1000 PPM 1 PPM
Chlorine (Cl2) 0-20 PPM 0.1 PPM
Sulfer Dioxide (SO2) 0-20 PPM 1 PPM
Nitric Oxide (NO) 0-250 PPM 1 PPM
Nitrogen Dioxide (NO2) 0-20 PPM 0.1 PPM
Ethylene Oxide (C2H4O) 0-100 PPM 1 PPM
Carbon Dioxide (CO2) 0-5% VOL 1 PPM
Phosphine (PH3) 0-20 PPM 0.1 PPM
Propane (C3H8) 0-100% LEL 1% LEL
Hydrogen Chloride (HCL) 0-10 PPM 0.1 PPM
Formaldehyde (CH2O) 0-10 PPM 0.1 PPM
Hydrogen Cyanide (HCN) 0-10 PPM 0.1 PPM
VOC 0-100 PPM 1 PPM
Methane (CH4) 0-100% LEL 1% LEL
Ethanol (C2H5OH) 0-100% LEL 1% LEL
Hydrogen Fluride (HF) 0-100 ppm 0.01 ppm





Your Bosean sensor will need to be sent back to us to be calibrated. Please click here to see more information on our calibration services, as well as our calibration pricing. Contact Us Today to get your sensor calibrated. *Please Note: There may be additional costs depending on replacement sensor pricing.


Key Features:

  • Adjustable low and high alarm level                 
  • Adjustable calibrating level
  • Low battery indication
  • Self-adjustment function
  • Visual and audible alarm with vibration
  • Password management to avoid wrong operation


  ≦ 5% Full Scale

  Response time



  LCD indicates the time and state Indication of alarm, fault and low voltage   with LED, sound, vibration

  Operating Environment

  Operating temperature -40℃~70℃ (for combustible gas)

  Operating temperature: -20℃~50℃ (for toxic gas)


  <95%RH non-condensing   

  Operating voltage

  DC3.7V Li battery 1500mAh

  Working time

  ≧8h continuously 

  Charging time


  Sensor life

  2 years

  Protection category



  about 130g (including battery but without accessories)




Downloadable Content:

User Manual

Datalogging Software

More Information
Manufacturer Oxidation Technologies
Call For Price Yes
Gas Ammonia (NH3), Carbon Dioxide (CO2), Carbon Monoxide (CO), Chlorine (Cl2), Ethylene Oxide (ETO), Formaldehyde (CH2O), Hydrogen (H2), Hydrogen Chloride (HCl), Hydrogen Cyanide (HCN), Hydrogen Sulfide (H2S), Methane (CH4), Nitric Oxide (NO), Nitrogen Dioxide (NO2), Oxygen (O2), Ozone (O3), Phosphine (PH3), Sulfur Dioxide (SO2), VOC
4-20 mA Output No
Field Replaceable Sensor No
Min, Max, Avg No
Datalogging No
Rechargeable Yes
Field Replaceable Battery No
Warranty 1 Year
Audible Alarm Yes
Calibration Annually
Sensor Life 2 years
Unit Features

- LED Screen

- Password Managment 

- Self-adjustment function

Sensor Range

Gas Dependent

- Over 20 Detectable Gases

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