GasAlert Extreme single toxic gas detector


This product is now obsolete. It will be replaced by the BW Solo



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 two year 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, multilanguage display and datalogging functionality make the GasAlert Extreme an ideal solution for many applications.

  • Direct, real-time readings on large LCD
  • Operates through consecutive shifts—exceptional battery run-time
  • Secure and accurate history with datalogging

Standard features of BW products:

  • Continuous LCD shows real-time gas 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

Additional GasAlert Extreme features:

  • 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


BW Honeywell

ANH VU Gas detection Corporation is authorization distributor for BW Technologies by Honeywell (BW Honeywell). We cover all BW lines of gas detector include GasAlert Extreme, GasAlert Clip Extreme, GasAlert Quattro, GasAlert Max XT II, GasAlert Microclip XT-XL-X3, GasAlert Micro 5, Gas Alert Micro 5 PID and IR, Microdock II, and all of the replacement sensors, parts, calibration gas, and accessories We also supply all related service for BW Gas detector which We supply ie: Replace parts, Annual calibration, Maintenance...  


Sensor Specification

GasAlert for Measuring Range Alarm Setpoints
(Factory defaults are shown. Alarm levels are field-adjustable.)
Relative Humidity non-condensing Operating Temperature
TWA Alarm STEL Alarm Low Alarm High Alarm
Hydrogen Sulfide (H2S) 0-100 ppm 10 ppm 15 ppm 10 ppm 15 ppm 15-90 -40 to +50 °C
-40 to +122 °F
Sulfur Dioxide (SO2) 0-100 ppm 2 ppm 5 ppm 2 ppm 5 ppm 15-90
Hydrogen Cyanide (HCN) 0-30.0 ppm 4.7 ppm 10.0 ppm 4.7 ppm 10.0 ppm 15-95
Carbon Monoxide (CO) 0-999 ppm 35 ppm 200 ppm 35 ppm 200 ppm 15-90 -30 to +50 °C
-22 to +122 °F
Chlorine (CI2) 0-50.0 ppm 0.5 ppm 1.0 ppm 0.5 ppm 1.0 ppm 10-95 -20 to +50 °C
-4 to +122 °F
Nitrogen Dioxide (NO2) 0-99.9 ppm 2.0 ppm 5.0 ppm 2.0 ppm 5.0 ppm 15-90
Ammonia (NH3) 0-100 ppm 25 ppm 35 ppm 25 ppm 50 ppm 15-90
Phosphine (PH3) 0-5.0 ppm 0.3 ppm 1.0 ppm 0.3 ppm 1.0 ppm 15-90
Ethylene Oxide (ETO) 0-100 ppm 1 ppm 5 ppm 1 ppm 5 ppm 15-90
Chlorine Dioxide (ClO2) 0-1 ppm 0.1 ppm 0.3 ppm 0.1 ppm 0.3 ppm 15-95
Ozone (O3) 0-1 ppm 0.1 ppm 0.1 ppm 0.1 ppm 0.2 ppm 15-90
Nitric Oxide (NO) 0-250 ppm 25 ppm 25 ppm 25 ppm 25 ppm 15-90
Oxygen (O2) 0-30.0% N/A N/A 19.5 % 22.5% 0-99

General Specification

Auto zero Yes
Calibration Automatic
Backlight Low light (auto); alarm condition (auto); on demand
Full function self-test Verifies integrity of sensor, circuitry and battery; audible/visual alarms
Sensor Plug-in, electrochemical cell (temperature compensated)
Indicators And Alarms Clearly advises alarm levels both visually and audibly
Visual alarm Flashing, wide-angled alarm lens with dual red LEDs, plus alarm LCD readout
Audible alarm High-output, pulsing 85 dB at 1 ft. / 0.3 m (typical)
Confidence beep Every 5 seconds (field-selectable)
Other Low battery; off warning; sensor fail
Optional internal vibrator Vibrates in sync with audible and visual alarms
Continuous LCD Display Alphanumeric gas readout and status display advises:
Gas ppm or % Continuously displays gas concentration present
TWA and STEL ppm or % Records and displays on demand
Peak ppm or % Records and displays peak (maximum) exposure to gas on demand
Setpoints Displayed on activation (auto) and on demand in ppm or %
Full function self-test Full function self-test on activation (auto)
General Specifications Impact-resistant ABS enclosure
Humidity 5% to 95% RH (non-condensing) (15% to 90% non-condensing for PH3 and NH3)
EMI/RFI Complies with EMC Directive 89/336/EEC
Battery type 3-volt lithium (camera battery available locally)
Battery life 3 years (9,000 hours)
Size 1.1 x 2.0 x 3.75 inches / 28 x 50 x 95 mm
Weight 2.9 oz. / 83 g




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