BW Technologies GasAlertMax XT II 4-Gas Detector with Pump – H2S, CO, O2, LEL

Overview

The BW Technologies GasAlertMax XT II 4-Gas Detector with Pump is a portable safety instrument designed for real-time ambient gas monitoring in demanding environments. Built to withstand tough conditions, it combines four sensor technologies to track H2S, CO, O2, and combustible gases with a focus on local sampling where you need it most.

What it Detects and How

Three sensor types work together to provide a clear picture of gas presence and concentration:

• Electrochemical cells measure hydrogen sulfide (H2S) and carbon monoxide (CO) with ppm precision.
• A capillary pore fuel cell monitors oxygen (O2) levels as a percentage by volume.
• A catalytic bead sensor continuously tracks combustible gases expressed as %LEL.

With an integrated diaphragm pump, the device can sample the air from your breathing zone, offering readings that reflect the atmosphere you’re actually exposed to, rather than relying on diffusion alone.

Alarms, Display, and Interaction

An alphanumeric LCD keeps you informed in real time, showing up to four gas concentrations, the battery level, calibration needs, and sensor self-test status. When any gas reaches preset limits, a 95 dB audible alarm combines with three bright LED bars and a built-in vibration to ensure you notice the alert, even in loud environments.

• Simultaneous audio, visual, and tactile alerts for low, high, STEL, and TWA conditions.
• Heartbeat indicator confirms normal operation at a glance.

Data, Power, and Durability

The detector logs the 10 most recent gas exposure events and can transmit data via infrared to a PC with the appropriate accessory. It runs on a replaceable AA alkaline battery, delivering up to 14 hours of operation, and includes a back-mounted clip for belt or lapel wear. With an IP66/67 rating and rugged, concussion-proof housing, it is designed for field use in wet or dusty conditions.

• Automatic self-test ensures sensor integrity and alarm functionality on activation and during use.
• Automatic shutdown if the self-test fails, adding a layer of safety.
• Compatibility with BW MicroDock II for automated testing and bump testing (sold separately).

Regulatory and Application Context

The XT II is CE and ATEX certified for electromagnetic compatibility, and UL listed as Intrinsically Safe for use in Class I, Division I environments. Typical applications span petroleum refineries, tanneries, sewage treatment, and paper mills, as well as training, research, and ambient monitoring where four-gas awareness matters.

Key Specifications (highlights)

• Gases: H2S, CO, O2, Combustible (LEL)
• Ranges: H2S 0–200 ppm; CO 0–1000 ppm; O2 0–30%; Combustible 0–100% LEL, 0–5% v/v
• Audible: 95 dB; Visual: three LED bars; Vibration: yes
• Battery: AA alkaline, up to 14 hours
• Protection: IP66/67; CE, ATEX, UL Intrinsically Safe