The NEW GasAlertMax XT portable and multi-gas detector simultaneously monitors four gases including hydrogen sulfide (H2S) carbon monoxide (CO), oxygen (O2) and combustibles (%LEL). The compact and field tough GasAlertMax XT 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. Integrated sampling pump SmartSample technology and powerful diaphragm pump provide reliable block detection and consistent, uniform flow Easy-to-read, multi-language LCD displays all four gas concentrations (H2S, CO, O2 and combustibles) simultaneously Visual, vibrating and audible alarm indicators Low, High, TWA (time weighted average) and STEL (short-term exposure limit) alarms LCD icons help with fast and easy notification of detector operation Built-in concussion-proof boot Simple auto-calibration procedure Rechargeable batteries provide enough power for a 13-hour shift Best in class block detection with semi-conductor pressure sensor Easy, one-button interface for simple operation Flexible user options minimize training Tamper-proof field operation Multi-language support in English, French, German, Spanish and Portuguese Compatible with MicroDock II automated test and calibration system