GasAlert Extreme single gas detector

The BW Technologies GasAlert Extreme is a long term solution, designed with durability and comfort in mind. The GasAlert Extreme reliably monitors for any single gas hazard within its wide range of available toxic gas models.

With easy on/off operation, this single gas detector offers extended longevity with a field replaceable battery and sensor. Calibration is a simple automatic procedure and is compatible with BW’s MicroDock II automatic test and calibration system. A wide range of user options, multi language display and datalogging functionality make the GasAlert Extreme an ideal solution for many applications.


  • Direct, real time readings on a large LCD
  • Operates through consecutive shifts
  • Secure and accurate history with datalogging
  • Continuous LCD shows real time concentrations
  • Compact and lightweight design makes it comfortable to wear
  • Water resistant
  • Simple automatic calibration procedure; compatible with BW MicroDock II automatic test and calibration station
  • Full function self test of sensor, battery status, circuit integrity and audible/visual alarms on start up
  • Bright wide angled visual alarm bars
  • Built in concussion-proof boot
  • Equipped with internal vibrating alarm for high noise areas
  • Secure and accurate history with datalogging
  • Multi language support in English, French, German, Spanish and Portuguese
  • Tamper proof settings with passcode protection
  • Alarm setpoints for all sensors are user adjustable. Setpoints are automatically displayed during instrument start up


  • Agriculture
  • Chemical
  • Fire service/HazMat
  • Food and beverage
  • Oil and gas
  • Pharmaceutical
  • Pulp and Paper
  • Steel Manufacturing
  • Water and wastewater industries


SensorsElectrochemical sensors
Battery3V Battery
Battery Life1.5 years, typical
AlarmsVisual, vibrating, audible (95dB)
Low, High, STEL, TWA
TestsSensor integrity, circuitry, battery and audible/visual alarms on activation, battery (continuous)
PumpCompatible with the Sampler motorized pump
User OptionsConfidence beep, latching alarms, stealth mode, passcode protection, automatic O2 calibration, automatic backlight, user settable calibration gas level, calibration pas due lockout, language choices
RatingsEMI/RFI: Complies EMC Directive 89/336/EEC
IP 66/67
Intrinsic RatingsUL: Class I, Division 1, Groups A, B, C, D, Class II, Division 1, Groups E, F, G
ATEX: CD Ex II 1 G T4, Ex ia IIC T4
CE: European Conformity
WarrantyTwo year warranty including sensors, One year for Ammonia, Chlorine, Ozone, Ethylene Oxide and Chlorine Dioxide sensors
Size1.1″ x 2.0″ x 3.75″
Weight2.9 ounces

Sensor Specifications

Hydrogen Sulfide (H2S)
0 – 100 ppm
Hydrogen Sulfide, High Range (H2S) 0 – 500 ppm
Sulfur Dioxide (SO2)0-100.0 ppm
Hydrogen Cyanide (HCN)0-30.0 ppm
Carbon Monoxide (CO)0-1,000 ppm
Carbon Monoxide, Low Hydrogen0-1,000 ppm
Ammonia (NH3) 0 – 100 ppm
Ammonia, High Range (NH3)0-400 ppm
Chlorine (Cl2)0-50.0
Nitric Oxide (NO)0-250 ppm
Nitrogen Dioxide (NO2)0-100 ppm
Phosphine (PH3)0-5.0 ppm
Ethylene Oxide (ETO)0-100.0 ppm
Chlorine Dioxide (ClO2)0-1.0 ppm
Ozone (O3)0-1.0 ppm
Oxygen (O2), % Vol0-30%


Download GasAlertExtreme EN

GasAlertClip frame