Honeywell BW Gas Alert Quattro

Code: GasAlertQuattro
  • Portable Small and Light
  • Up To Four Gases
  • Simple Operation

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BW Gas Alert Quattro by Honeywell is a diffusion detector for Flammable LEL, Oxygen O2, Carbon Monoxide CO and Hydrogen Sulphide H2S. With three, two or single gas models available.

Designed to be robust and reliable. Operated by one button, for simplicity and to minimise training. The LCD shows real-time gas readings and status icons for calibration and bump test compliance. Remaining battery life is also displayed. The IntelliFlash feature provides visual confirmation of compliance and operation, up to a 20 foot (6.1 metres) distance.

The GasAlert Quattro is equipped with Surecell sensors offering high performance in harsh environments. A manual aspirator accessory can be purchased for confined space applications.

In common with other BW Technologies monitors the user can customise the compliance beep and flash, change data logging interval, force bump and calibration test, set message on startup, switch a sensor off (prolonging battery). Measure combustible in LEL or volume, adjust latching alarms, initiate auto zero on startup, enter safe display mode and flip display viewing.

Standard Features

  • Datalogging and event logging
  • Rechargeable or Alkaline models
  • CO and H2S sensors incorporate resistance to cross sensitive gases such as methanol and ethanol
  • Self-testing: Sensors, battery, circuit integrity and alarms on start. Continuous on sensors
  • Alarms: Bright wide-angled visual alarm bars (6 LEDs), vibrating and audible (95 dB). Low, High, STEL, TWA, OL (over limit)
  • Battery life: Temperature 20-50°C, AA alkaline: 14 hours, Rechargeable: 20 hours or -20 to 0°C, 18 hours
  • Multi-language choose English, French, German, Spanish and Portuguese
  • Compatible with MicroDock II for automated calibration and bump testing
  • Full two‑year warranty including all sensors


  • UL: Class I, Division 1, Groups A,B,C,D
  • ATEX: II 1 G Ga Ex ia IIC T4. IECEx: Ex ia IIC T4.
  • CU TR Ex
  • Marine Equipment Directive (MED) 96/98/EC
  • American Bureau of Shipping
  • Meets ACGIH 1 ppm H2S TWA recommendations


  • Water Resistant IP Rating: IP 66/67
  • Operating Temperature: -4 to +122°F / -20 to +50°C
  • Size: 13.0 x 8.1 x 4.7 cm
  • Weight: rechargeable 316g/alkaline 338 g

GasAlertQuattro detector is supplied with a concussion-proof boot, rechargeable battery pack with wall charger or alkaline pack with three AA batteries, calibration cap with a hose, reversible screwdriver and operator manual.

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Title Size
GasAlertQuattro Brochure 583 KB
GasAlertQuattro Ordering Information 604 KB
GasAlertQuattro Quick Reference Guide 3 MB
GasAlertQuattro Manual 836 KB
GasAlertQuattro Quick Service Guide 216 KB

Additional information

Weight0.190 kg

Ordering Information

Filtered LEL versions below: Available in as Rechargeable or Alkaline
Four Gas
QT-XWHM-R-Y-EUQT-XWHM-A-Y-EUCombustible (%LEL), Oxygen (O2), Hydrogen Sulphide (H2S), Carbon Monoxide (CO)
Three Gas
QT-XWH0-R-Y-EUQT-XWH0-A-Y-EUCombustible (%LEL), Oxygen (O2), Hydrogen Sulphide (H2S).
QT-XW0M-R-Y-EUQT-XW0M-A-Y-EUCombustible (%LEL), Oxygen (O2), Carbon Monoxide (CO)
QT-0WHM-R-Y-EUQT-0WHM-A-Y-EUCombustible (%LEL), Hydrogen Sulphide (H2S), Carbon Monoxide (CO)
QT-X0HM-R-Y-EUQT-X0HM-A-Y-EUOxygen (O2), Hydrogen Sulphide (H2S), Carbon Monoxide (CO)
Two Gas
QT-XW00-R-Y-EUQT-XW00-A-Y-EUCombustible (%LEL), Oxygen (O2)
QT-0WH0-R-Y-EUQT-0WH0-A-Y-EUCombustible (%LEL), Hydrogen Sulphide (H2S)
QT-0W0M-R-Y-EUQT-0W0M-A-Y-EUCombustible (%LEL), Carbon Monoxide (CO
QT-00HM-R-Y-EUQT-00HM-A-Y-EUHydrogen Sulphide (H2S), Carbon Monoxide (CO)
QT-X0H0-R-Y-EUQT-X0H0-A-Y-EUOxygen (O2), Hydrogen Sulphide (H2S)
QT-X00M-R-Y-EUQT-X00M-A-Y-EUOxygen (O2), Carbon Monoxide (CO)


Single Gas
QT-0W00-R-Y-EUQT-0W00-A-Y-EUCombustible (%LEL)
QT-X000-R-Y-EUQT-X000-A-Y-EUOxygen (O2)
QT-00H0-R-Y-EUQT-00H0-A-Y-EUHydrogen Sulphide (H2S)
QT-000M-R-Y-EUQT-000M-A-Y-EUCarbon monoxide (CO)
Non-Filtered LEL versions below: Available in as Rechargeable or Alkaline
Four Gas
QT-XUHM-R-Y-EUQT-XUHM-A-Y-EUCombustible (%LEL), Oxygen (O2), Hydrogen Sulphide (H2S), Carbon Monoxide (CO
Three Gas
QT-XUH0-R-Y-EUQT-XUH0-A-Y-EUCombustible (%LEL), Oxygen (O2), Hydrogen Sulphide (H2S).
QT-XU0M-R-Y-EUQT-XU0M-A-Y-EUCombustible (%LEL), Oxygen (O2), Carbon Monoxide (CO)
QT-0UHM-R-Y-EUQT-0UHM-A-Y-EUCombustible (%LEL), Hydrogen Sulphide (H2S), Carbon Monoxide (CO)
Two Gas
QT-XU00-R-Y-EUQT-XU00-A-Y-EUCombustible (%LEL), Oxygen (O2)
QT-0UH0-R-Y-EUQT-0UH0-A-Y-EUCombustible (%LEL), Hydrogen Sulphide (H2S)
QT-0U0M-R-Y-EUQT-0U0M-A-Y-EUCombustible (%LEL), Carbon Monoxide (CO
Single Gas
QT-0U00-R-Y-EUQT-0U00-A-Y-EUCombustible (%LEL)

Replacement Sensor Screens

QT-SS Quad sensor screen (kit of 2)
QT-SS-K1 Quad sensor screen (kit of 10)

Replacement Sensors

SR-W04-75C Combustible (% LEL) sensor, filtered
SR-W04-75 Combustible (% LEL) sensor, non-filtered
SR-X10-C1 Oxygen (O2) sensor
SR-H04-SC Hydrogen sulfide (H2S) sensor
SR-M04-SC Carbon monoxide (CO) sensor
SR-DUMM1 Dummy sensor for one oxygen (O2), hydrogen sulfide (H2S) or carbon monoxide (CO) location
SR-DUMM2 Dummy sensor for the combustible (LEL) location

Service Parts

QT-SCREW-K1 Screw kit (kit of 40 screws) – back case screws (4-40 x 7/16”); PCB screws (2-56 x 1/4”)
QT-BC1 Back enclosure (yellow) with 6 screws, 2 PCB screws and alligator clip
QT-BC1B Back enclosure (black) with 6 screws, 2 PCB screws and alligator clip
QT-PCB-K1 Main PCB and sensor PCB kit
QT-FC1 Front enclosure (yellow) with 6 screws and 2 PCB screws
QT-FC1B Front enclosure (black) with 6 screws and 2 PCB screws
GA-VM-2 Vibration motor
XT-AG-1. Alligator-style clip (stainless steel with screw)

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