BW Gas Alert Quattro Series Multi-Gas Detectors

Rugged and reliable, the BW Technologies GasAlert Quattro four-gas detector combines a comprehensive range of features with simple one-button operation. With flexible power options, the GasAlert Quattro is always ready. The graphic LCD displays easy to identify icons that indicate operational information, such as bump test and calibration status for simplified onsite auditing. IntelliFlash provides continuous visual confirmation of detector operation and compliance. Suited to a wide range of industrial applications including confined space entry, the GasAlertQuattro is fully compatible with BW's MicroDock II automatic test and calibration system.

The GasAlertQuattro was designed with an emphasis on simplicity, durability and reliability using proven Honeywell processes and engineering. With the GasAlertQuattro, seeing is believing.

Perfect for rugged environments, the GasAlertQuattro features a durable exterior with reinforced bumpers and integral concussion proof boot to protect the detector. This rugged design keeps the GasAlertQuattro working in the most extreme weather, environments and work conditions. Relying on the GasAlertQuattro prevents costly downtime.

Rigorously developed over two years with proven Honeywell engineering processes, the GasAlertQuattro is built to deliver a superior performance. All sensors on the open market were thoroughly evaluated. Alphasense and Surecell™ sensors were selected because they provide the best overall operation and reliability. Surecell sensors boast over 10 billion hours of field use and abuse. The GasAlertQuattro's field-proven sensors offer enhanced resistance to common industrial cross sensitive gases such as methanol and ethanol (CO and H2S sensors) which means more reliable sensor responses.

What's Included:

  • Calibration cap and tubing
  • rechargeable Li battery pack or three AA alkaline batteries depending on model
  • Models with rechargeable battery pack also include a battery charger.

Key Features:

Standard features of all BW Technologies gas detectors
  • 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
Additional features of the GasAlert Quattro by BW Technologies:
  • 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 unprecedented performance in even the harshest environments


Sensor Specifications:
Gas Measuring Range Resolution
Hydrogen sulfide (H2S) 0-200ppm 0.1ppm
Carbon monoxide (CO) 0-1000ppm 1ppm
Oxygen (O2) 0-30.0% 0.1%
Combustible gases (%LEL) 0-100% LEL
0-5.0% v/v
Alarm setpoints for all sensors are user adjustable. Setpoint(s) are automatically displayed during instrument start up
Size 5.1 x 3.2 x 1.9 in. / 13.0 x 8.1 x 4.7 cm
Weight - 11.15 oz. / 316 g (with rechargeable battery pack)
- 11.92 oz. / 338 g (with alkaline battery pack)
Temperature -4 to +122°F / -20 to +50°C
Humidity 10% - 100% RH (non-condensing)
Alarms - Visual (six, red LEDs), vibrating, audible (95dB)
- Low, High, STEL, TWA, OL (over limit)
Tests Sensor integrity, circuitry, battery and audible/visual alarms on activation, battery (continuous), sensor (continuous)
Pump Compatible with the Sampler motorized sampling pump
Battery life AA alkaline: 14 hrs (+68 to 122°F / +20 to 50°C)
Rechargeable: 20 hrs (+68 to 122°F / +20 to 50°C)
18 hrs (-4 to +32°F / -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 by %LEL or % by vol of methane
User-defined calibration gas concentration
Force bump
Custom start up message
Datalog interval
Ratings EMI/RFI: Complies with EMC Directive 2004/108/EC IP66/IP67
Certifications & Approvals See datasheet
Warranty Full 2 year warranty including sensors

This gas detector unit has the following replacement sensors available, depending upon individual configuration:

SR-X10-C1 Replacement oxygen (O2) sensor
SR-W04-75C Replacement combustible (LEL) sensor
SR-H04-SC Replacement hydrogen sulfide sensor
SR-M04-SC Replacement carbon monoxide sensor

GasAlert Quattro (QT) Expert Product Review:

The Good:

Rugged, reliable and built to provide reliable performance, simplicity and durability. The BW GasAlert Quattro combines a nice range of features with simple one-button operation. Flexible battery options mean the unit it always ready to work.

The Bad:

It is higher priced than the MicroClip XT but the features and battery options make the extra dollars worthwhile to me. The user-options can only be set via the IR interface and the software, not in the field.

The Bottom Line:

The Quattro is one my favourite models. It is so simple to use, with reliable sensors and the ability to change battery packs in the field makes this unit one of the best units out there in my opinion.

Full Review:

It is a good fit in virtually any application where toxic and combustible gases are a concern, such as Oil & Gas, Utilities, Municipalities, Refineries, Steel Mills, Pulp, Paper and more. The sensors in the Quattro were selected after numerous field trials because they give the best overall operation and reliability.

The new IntelliFlash feature provides visual confirmation of the operation and calibration or bump testing compliance. Regular maintenance is required on this model in the form of frequent Calibrations and battery replacement or charging. Bump Tests can also be performed on the unit depending on personal preference or when site safety regulations require it.

Multiple User-options, such as flip display and bump test frequency for example, can only be set via the IR interface and the software, not in the field. This is both good and bad in that the options can't be changed by the everyday worker, which is great if you are the safety guy and have the detector set to match your company guidelines, but inconvenient for those users who like to make adjustments in the field themselves.

Built for rugged environments, the built-in concussion proof boot provides excellent protection against accidental bumps, scratches and damage; and it is water-proof, with an IP rating of 67 it can be submerged in water up to 1 m deep for 30 minutes. The real-time gas concentration is displayed continuously on the LCD so you will always know the current levels, even when the unit is not in alarm. The unit has a built in Datalogging feature, enabling you to retrieve a detailed and accurate history of conditions and unit maintenance if needed.

Calibrating the unit is required every 180 days by factory default but is quick and easy to perform; the procedure can be done in the field and only takes about 2 minutes to perform, and all you will require is a cylinder of calibration gas and a regulator. It is also compatible with the BW MicroDock II calibration and bump test station for those who wish to use a more hands-free, automated, calibration and bump test procedure.


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