Includes built-in sampling pump. Will sample at upto 20m. Simple 1 button operation. Measures:- H2S 0 to 200ppm (0.1ppm resolution), CO 0 to 1000ppm (1ppm resolution), O2 0 to 30% (0.1% resolution) and combustible gases 0 to 100% LEL (1% resolution Methane), 0 to 5% v/v (0.1% resolution). Alarms: visual, vibrating and audible (95dB), Low, High, STEL, TWA and OL (over limit). Lithium polymer battery life 13hrs (typical) recharge time 6hrs.
Instructional video for the BW GasAlertMax XT II Confined space monitor includes pump