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BW GasAlert Quattro

GasAlert Quattro

Heavy duty standard 4 Gas Detector

The GasAlert Quattro portable and multi-gas detector simultaneously monitors and displays up to four gases including Hydrogen Sulphide (H2S), Carbon Monoxide (CO), Oxygen (O2), and combustibles (%LEL). The super tough GasAlert Quattro features a bright flashing green LED to provide visible confirmation of safe gas levels to both the user and other workers - a great feature for sentries and supervisors. Extra large, high contrast LCD display, industrial sensor performance, and simple one-button operation makes this gas detector an absolute winner for Mining, Oil & Gas, Construction and other industrial users.

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Sensor Range

  • H₂S, 
  • CO, 
  • O₂, 
  • LEL.
  • Features
  • Specifications
  • Sensor Specs
  • Accessories
  • PDF Download


  • Continuous LCD shows real-time gas concentrations
  • Compact and lightweight design makes it comfortable to wear
  • Simple automatic calibration procedure; compatible with BW MicroDock II automatic test and calibration station
  • Full function self-test of sensor(s), battery status, circuit integrity and audible/visual alarms on start up and continuous testing on sensor(s)
  • Bright wide-angled visual alarm bars
  • Built-in concussion-proof boot
  • Powered by an interchangeable rechargeable battery pack or alkaline pack with 3 AA batteries
  • One-button operation and straightforward user interface minimizes training
  • Comprehensive datalogging and event logging capacity
  • IntelliFlash verifies operation and compliance to both the user and supervisors from up to 20 ft. / 6.1 m
  • Enhanced resistance to common industrial cross sensitive gases such as methanol and ethanol (CO and H2S sensors)
  • Multi-language support in English, French, German, Spanish and Portuguese
  • Field-proven SureCell sensors offer an unprecedented performance in even the harshest environments.




13.0 x 8.1 x 4.7 cm


11.15 oz/ 316 g (with rechargeable battery pack)

11.92 oz/ 338 g (with alkaline battery pack)


-20 to +50° C


10% - 100% RH (non-condensing)

  • Visual (six red LEDs), vibrating, audible (95 dB)
  • Low, High, STEL, TWA, OL (over limit)

Sensor integrity, circuitry, battery and audible/visual alarms on activation, battery (continuous), sensor (continuous)


Compatible with the Sample motorized sampling pump

Battery Life

AA alkaline: 14 hrs (+20 to 50° C)

Rechargeable: 20 hrs (+20 to 50° C), 18hrs (-20 to 0° C)

User Options
  • Confidence/ compliance beep
  • Confidence flash
  • Set STEL interval
  • Sensor on/off
  • Latching alarms
  • Safe display mode
  • Force calibration
  • Auto-zero on start up
  • Flip display
  • Combustible gas measurement (% LEL or % by volume methane)
  • User-definable calibration gas concentration
  • Force bump
  • Language choices (five)
  • Custom startup message
  • Datalog interval

EMI/RFI: Complies with EMC Directive 2004/108/EC



Full two-year warranty including all sensors

Sensor Specs

Sensor Specifications

Gas Measuring Range Resolution
H2S 0-200 ppm 0.1 ppm
CO 0-1000 ppm 1 ppm
O2 0-30.0% 0.1%
LEL 0-100% LEL 1%


Concussion-Proof Boot

Part Number: GA-BQT

Auxiliary Filter

Part Number: QT-AF-K1

LCD protector and Kit of 5 filters

Rechargeable Battery Pack

Part Number: QT-BAT-R01

Alkaline Battery Pack

Part Number: QT-BAT-A01

Includes batteries

Multi-Unit Cradle Charger

Part Number: QT-C01-MC5

Up to 5 units

Multi-Unit Power Adaptor

Part Number: GA-PA-1-MC5-AU

Up to 5 units

Vehicle Power Adapter

Part Number: GA-VPA-1

12-24 VDC

Test Cap

Part Number: QT-TC-1

Calibration cap and hose

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