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BW GasAlert Max XT II Personal Multi-Gas Detector

GasAlert Max XT II

The GasAlert MaxXTII portable multi-gas detector simultaneously monitors and displays up to four gases including Hydrogen Sulphide (H2S) Carbon Monoxide (CO), Oxygen (O2) and combustibles (%LEL). The compact and field tough GasAlertMaxXT II features a non-intrusive integrated sampling pump designed for performance, reliability and ease-of-use. SmartSample pump technology improves remote sampling result accuracy and ensures a consistent, uniform flow. One-button operation guarantees ease of use even while wearing gloves. Tamper-proof, user adjustable options enable the instrument to be customized to suit your specific application.

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Sensor Range

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


  • Integrated sampling pump with reliable diaphragm technology
  • Best in class block detection with semi-conductor pressure sensor
  • Multi-language support in English, French, German, Spanish and Portuguese
  • Conveniently manage your detector with Fleet Manager II
  • Equipped with standard datalogging and event logging
  • Continuous LCD shows real-time gas concentrations
  • Continuous visual compliance with IntelliFlash
  • Compact and lightweight design makes it comfortable to wear
  • Water-resistant
  • Simple automatic calibration procedure; compatible with MicroDock II automatic test and calibration station
  • Full function self-test of sensor, battery status, circuit integrity and audible/visual alarms on start-up
  • Bright wide-angled visual alarm bars
  • Built-in concussion- proof boot
  • Compatible with Honeywell BW Connect for real time monitoring


Technical Specifications


5.1 x 2.8 x 2.0 in. / 13.1 x 7.0 x 5.2 cm


11.5 oz. / 328 g

Operating Temperature

-4 to 122 F/ -20 to 50C


10- 100% RH (non-condensing)

Alarms and Type

Visual, vibrating, audible (95 dB); Low, High, TWA, STEL, OL (over limit), Low Battery, Pump


Audible/visual alarms on activation, sensors, battery, pump and circuitry (continuous)

Typical Battery Life

13 hours @ 32oF / 0oC 8 hours @ -4oF / -20oC Recharges in 6 hours

Pump Draw

Sample from up to 75 ft. / 23 m Note: Do not attempt to calibrate a Honeywell BWTM Max XT with tubing longer than the standard calibration tubing supplied with the detector.

User Options

• Confidence beep • Safety(sensor)lock • Latching alarms • Safe display mode • Calibration IR lock • Location selection • Force block test • Force bump test when overdue • Force calibration when overdue • Sensor configuration • Detector identification • Low alarm acknowledge • Language choices (five) • Set custom start-up message • Confidence interval • Datalog interval

Ratings Ingress Protection

EMI/RFI: Complies with EMC Directive 2004/108/EC IP66/67

Certifications and Approvals

For all certifications, please review the manual or consult Encore Monitoring.


Full two year warranty including all sensors.

Sensor Specs

Sensor Specifications

Gases Standard Measuring Range Resolution
H2S 0-200ppm 1/0.1 ppm
CO 0-1,000ppm 1 pmm
O2 0-30%vol. 0.1% vol.
LEL 0-100%LEL. 0-5.0%v/v 1% LEL. 0.1%v/v


Concussion Proof Boot

Part Number: GA-BXT

Multi-Unit Cradle Charger

Part Number: XT-C01-MC5

Up to 5 units

Multi-Unit Power Adaptor

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

Up to 5 units

Vehicle Power Adaptor

Part Number: GA-VPA-1

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