The Honeywell BW GasAlertMax XT II is a professional portable 4-gas detector with an integrated motorized sampling pump, designed for continuous monitoring of four important atmospheric hazards: combustible gases and vapours (LEL), oxygen (O₂), hydrogen sulphide (H₂S) and carbon monoxide (CO). The integrated pump makes the instrument particularly suitable for confined-space entry, pre-entry atmospheric testing and remote gas sampling, where the atmosphere needs to be checked from a distance before personnel enter an area.
The detector measures combustible gases from 0–100% LEL, oxygen from 0–30.0% by volume, hydrogen sulphide from 0–200 ppm, and carbon monoxide from 0–1000 ppm. Standard resolutions are 1% LEL, 0.1% O₂, 1 ppm H₂S and 1 ppm CO. All sensor alarm setpoints are user adjustable, allowing the instrument to be configured according to the requirements of the application.
Integrated motorized sampling pump
One of the main advantages of the GasAlertMax XT II is its built-in motorized pump. The pump can draw an atmospheric sample from up to approximately 23 metres (75 ft) away, allowing users to test confined spaces, tanks, voids and other areas before entering them.
The SmartSample pump technology is designed to help identify blocked sampling lines and maintain reliable sampling performance. The detector also provides a dedicated pump alarm, warning the user if there is a problem with the sampling system.
This makes the GasAlertMax XT II particularly useful when remote sampling is required, rather than relying solely on the detector’s position at the user’s body.
Simple operation and clear alarms
The GasAlertMax XT II is designed for straightforward field operation with one-button control. A continuous LCD displays the real-time gas concentrations, while the detector provides audible, visual and vibrating alarms when dangerous conditions are detected.
The audible alarm is rated at approximately 95 dB, and the detector can provide low, high, STEL, TWA, over-limit, low-battery and pump alarms.
The instrument also performs continuous checks of important functions including the sensors, battery, pump and circuitry, helping identify potential problems during operation.
Confined-space and remote monitoring applications
With its integrated pump and four-gas configuration, the GasAlertMax XT II is particularly suited to applications where atmospheric conditions need to be assessed before and during entry.
Typical applications can include:
- Confined-space entry
- Tanks and enclosed spaces
- Marine and offshore work
- Industrial maintenance
- Oil and gas applications
- Wastewater and sewage environments
- General hazardous-area work
- Remote atmospheric sampling
The detector can sample from a remote location using sampling tubing, helping personnel assess an atmosphere before physically entering a potentially hazardous space.
Battery and operating time
The GasAlertMax XT II uses a rechargeable battery and provides approximately 13 hours of operation at 0°C and approximately 8 hours at -20°C, with a recharge time of approximately six hours. This provides enough operating time for a typical working shift under normal conditions.
The detector has a compact housing measuring approximately 13.1 × 7.0 × 5.2 cm and weighs approximately 328 g. Its operating temperature range is approximately -20°C to +50°C, with a specified humidity range of 10–100% RH, non-condensing.
The housing is rated IP66/IP67, providing protection against dust and water ingress and making the detector suitable for demanding industrial environments.
Calibration, bump testing and data management
The GasAlertMax XT II is compatible with the Honeywell MicroDock II automated test and calibration system, allowing organisations to simplify routine bump testing and calibration of their gas detector fleet.
The detector also provides standard event logging and datalogging, while compatibility with Honeywell’s Fleet Manager II software allows users to manage instrument settings, download data and maintain calibration and bump-test records.
The detector can also be configured with various safety and management functions, including forced bump testing when overdue, forced calibration when overdue, sensor lock, latching alarms, confidence beep, safe display mode, calibration lock and configurable datalogging intervals.
Approvals & certifications
The Honeywell BW GasAlertMax XT II carries a range of international certifications and approvals, including:
- ATEX: II 1 G, Ex ia IIC T4
- IECEx: Ex ia IIC T4 Ga
- CE: European Conformity
- ABS – American Bureau of Shipping
- CSA: Class I, Division 1, Groups A, B, C & D
- EAC Ex: CU TR Ex
- IP66/IP67: Ingress protection
- MicroDock II compatible
- Fleet Manager II compatible
Honeywell also provides specific ABS Marine Design Assessment documentation for the GasAlertMax XT II, confirming its recognition by ABS for the applicable configuration.
⚠️ SOLAS / MED approval
THIS PRODUCT IS NOT SOLAS/MED APPROVED.
This is particularly important for your marine customers.
Although the GasAlertMax XT II has ABS approval, as well as ATEX, IECEx, CE and other hazardous-area certifications, ABS approval is not the same as SOLAS/MED approval.
The exact De Wolf Maritime Safety product page states:
SOLAS/MED-approved: No
Therefore, customers must not assume that the ABS approval makes this detector SOLAS/MED compliant. Where a vessel, flag state or specific application requires MED/SOLAS-approved portable gas detection, a detector specifically carrying the required marine approval should be selected.
Approval summary
✓ ATEX
✓ IECEx
✓ CE
✓ ABS – American Bureau of Shipping
✓ CSA
✓ EAC Ex
✓ IP66/IP67
✓ MicroDock II compatible
✓ Fleet Manager II compatible
✗ NOT SOLAS/MED APPROVED
The Honeywell BW GasAlertMax XT II is therefore a robust professional solution for simultaneous monitoring of LEL, O₂, H₂S and CO, with the added advantage of an integrated motorized pump for remote sampling. It is particularly well suited to confined-space entry and applications where the atmosphere needs to be tested before personnel enter.
It is suitable for industrial, hazardous-area, offshore and certain marine applications where SOLAS/MED approval is not a requirement. For vessels or applications where SOLAS/MED-approved portable gas detection is mandatory, customers should select an appropriate product from your SOLAS Approved Gas Detection category.
