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 display shows real-time gas readings and status icons for calibration and bump test compliance. Remaining battery life is also displayed. In addition the IntelliFlash feature provides visual confirmation of compliance and operation, up to a 20 foot (6.1 metre) distance.

The GasAlert Quattro is equipped with Surecell sensors offering high performance in tough 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 start up, switch a sensor off (prolonging battery). Measure combustible in LEL or volume, adjust latching alarms, initiate auto zero on start up, 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 concussion-proof boot, rechargeable battery pack with wall charger or alkaline pack with three AA batteries, calibration cap with 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)


Sampling & Testing Equipment

GasAlertQuattro Deluxe Confined Space Kit – includes manual aspirator kit, IR Connectivity QT-CK-DL
Kit with Fleet Manager II software, sampling probe, carrying holster, auxiliary filter kit, calibration cap
with 1 ft. / 0.3 m hose, 0.5 LPM regulator and carrying case with foam insert.
Detector and calibration gas sold separately.
Manual Aspirator Pump Kit GA Quattro QT-AS01
Sample probe with hydrophobic and particulate filters GA-PROB1-1
Filter and gasket replacements for sample probe (GA-PROB1-1) GA-PROB-FIL-K1
Metallic sintered particulate filter GA-MFILTER
Replacement Airstone Water/Particulate Filter for Sampling Hoses (kit of 4) D4-PF-1
Sampling float GA-FLOAT
Replacement test cap and hose QT-TC-1

Carrying and Protective Accessories

Carrying case for GasAlertQuattro with foam insert QT-CK-CC
Concussion Proof Boot GasAlertQuattro GA-BQT
Carrying Holster GasAlertQuattro GA-HQT
Auxiliary filter (LCD protector) – includes five filters QT-AF-K1
Replacement auxiliary filter for use with QT-AF-K1 (kit of 10) QT-SS-AF-K1
Vehicle attachment (compatible with single T-pattern or 4-hole AMPS mounting system) QT-VMB-1
Neck strap with safety release GA-NS-1 D1 £28.00
Short strap (6 in./15.2 cm) GA-LY-1 D1 £6.00
Extension strap (4 ft./1.2 m) GA-ES-1 D1 £48.00
Chest harness GA-CH-2

Power Supplies and Spares

Rechargeable battery pack, yellow QT-BAT-R01
Rechargeable battery pack, black QT-BAT-R01B
Alkaline battery pack with batteries, yellow QT-BAT-A01
Alkaline battery pack with batteries, black QT-BAT-A01B
Multi-unit (5) cradle charger QT-C01-MC5
Multi-unit (5) wall outlet power adaptor GA-PA-1-MC5-EU
12-24 Vdc vehicle power adaptor GA-VPA-1
12-24 Vdc direct-wire power adaptor GA-PA-3
Replacement wall outlet power adaptor GA-PA-1-EU

Datalogging Accessories

IR connectivity kit with Fleet Manager II software GA-USB1-IR

Replacement Sensor Screens

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

Replacement Sensors

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

Service Parts

Replacement screw kit (kit of 40 screws) – back case screws (4-40 x 7/16”); PCB screws (2-56 x 1/4”) QT-SCREW-K1
Replacement back enclosure (yellow) with 6 screws, 2 PCB screws and alligator clip QT-BC1
Replacement back enclosure (black) with 6 screws, 2 PCB screws and alligator clip QT-BC1B
Replacement main PCB and sensor PCB kit, QT-PCB-K1
Replacement front enclosure (yellow) with 6 screws and 2 PCB screws QT-FC1
Replacement front enclosure (black) with 6 screws and 2 PCB screws QT-FC1B
Replacement LCD kit QT-LCD-K1
Replacement vibration motor Level-1 GA-VM-2
Replacement alligator-style clip (stainless steel with screw) None XT-AG-1

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