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Product Features
  • Equipped with internal vibrating alarm for high noise areas
  • Secure and accurate history with datalogging option
  • Multi-language support in English, French, German, Spanish, and Portuguese
Delivery options

At Cadmus Products we aim to deliver orders efficiently and at highly competitive rates. 

  • We can ship consignments of all shapes and sizes and hazardous content across the UK and worldwide. Most of our orders are sent via DHL, however sometimes we may use other couriers.
  • If you are purchasing a laboratory product online you can find out the price of shipping checkout. If you are obtaining a quote for a product, then we will email you
    with our best shipping prices along with your quote.
  • Please see our delivery page for full information
The BW Gas Alert Extreme is designed with durability and comfort in mind, this gas detector 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 Technologies by Honeywell'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.

Additional GasAlert Extreme features:

  • Tamper-proof settings with passcode protection
  • Continuous LCD shows real-time gas concentration
  • 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

Product Specification



1.1 x 2.0 x 3.75 in. / 2.8 x 5.0 x 9.5 cm
Weight 2.9 oz. / 82 g
Alarms - Visual, vibrating, audible (95dB)
- Low, High, STEL, TWA
Tests Sensor integrity, circuitry, battery and audible/visual alarms
on activation, battery (continuous)
Pump Compatible with the Sampler motorized pump
Typical Battery Life 1.5 year battery life (typical) with replaceable 3V battery
User Options Confidence beep
Latching alarms
Stealth mode
Passcode protection
Automatic O2 calibration
Automatic backlight
User-settable calibration gas
Calibration past due lockout
Language choices (five)
Ratings EMI/RFI: Complies with EMC Directive 89/336/EEC
IP 66/67
Certifications & Approvals Class I, Div. 1, Gr. A, B, C, D
Class II, Div. 1, Gr. E, F, G
American Bureau of Shipping
Ex ia IIC T4
IECEx: Ex ia IIC T4
: European Conformity

Full two year warranty including sensors
(One year NH3, Cl2, O3, ETO, ClO2 sensors)

Gas Alert Extreme
  • Ammonia NH3 GAXT-A-DL
  • Ammonia NH3 extended range GAXT-A2-DL
  • Carbon monoxide CO GAXT-M-DL
  • Carbon monoxide, H2 resistant CO-H GAXT-M2-DL
  • Chlorine Cl2 GAXT-C-DL
  • Chlorine dioxide ClO2 GAXT-V-DL
  • Ethylene oxide (ETO) C2H4O GAXT-E-DL
  • Hydrogen cyanide HCN GAXT-Z-DL
  • Hydrogen sulfide H2S GAXT-H-DL
  • Hydrogen sulfide H2S extended range GAXT-H-2-DL
  • Nitric oxide NO GAXT-N-DL
  • Nitrogen dioxide NO2 GAXT-D-DL
  • Oxygen O2 GAXT-X-DL-2*
  • Ozone O3 GAXT-G-DL
  • Phosphine PH3 GAXT-P-DL
  • Sulfur dioxide SO2 GAXT-S-DL
Carrying & Protective Accessories and Spares
  • Concussion-proof boot with stainless steel alligator-style clip GA-BALERT
  • Replacement breathing Tubes, kit of 200 for Breathing Adaptor (GA-BA-K1) GA-BT-K1
  • Splash guard filters for use with GA24-BALERT (kit of 5) GA-BSPLASH-K
  • Hard hat clip (non-conductive) GA-HC-1
  • Belt clip with screw GA-CL-1
  • Neck strap with safety release GA-NS-1
  • Short strap (6 in./15.2 cm) GA-LY-1
  • Extension strap (4 ft./1.2 m) GA-ES-1
  • Chest harness GA-CH-2
  • Manual Aspirator Pump Kit GA Extreme, GA M5 GA-AS02
  • Test cap and hose GA-TC-1
Power Supply
  • Battery - lithium, 3V (Panasonic CR-2PE/BN) E2829
Datalogging Accessories
  • IR DataLink USB adaptor GA-USB2
Replacement Sensor Screens
  • Replacement sensor Screen Filters with gasket (kit of 10) GAXT-SS
Replacement Sensors
  • Replacement Ammonia NH3 sensor* SR-A04
  • Replacement Ammonia NH3 sensor, extended range* SR-A204
  • Replacement Carbon monoxide CO sensor SR-M04-SC
  • Replacement Carbon monoxide CO-H sensor, H2 resistant PS-RM04H
  • Replacement Chlorine Cl2 sensor* PS-RC10
  • Replacement Chlorine dioxide ClO2 sensor* SR-V04
  • Replacement Ethylene oxide (ETO) sensor* SR-E04
  • Replacement Hydrogen cyanide HCN sensor* PS-RZ10
  • Replacement Hydrogen sulfide H2S sensor PS-RH04S
  • Replacement Nitric oxide NO sensor SR-N04
  • Replacement Nitrogen dioxide NO2 sensor PS-RD04
  • Replacement Oxygen O2 sensor SR-X2V
  • Replacement Ozone O3 sensor* SR-G04
  • Replacement Phosphine PH3 sensor SR-P04
  • Replacement Sulfur dioxide SO2 sensor PS-RS04
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