3 year 4 Gas detector with no charging or calibration necessary & infrared combustible gas (LEL) sensor. Detects hydrogen sulfide (H2S), carbon monoxide (CO), oxygen (O2 ) & combustible gases (LEL)

• Operates for 3 years continuously with no charging • Detects combustible gases (LEL), hydrogen sulfide (H2S), carbon monoxide (CO) & oxygen (O2) • Constant calibrations not necessary saving test gas & downtime • Infrared LEL sensor does not require oxygen to detect gas • Low maintenance cost - infrared LEL sensor is immune to poisons • Simple to use one button operation - large, easy to read screen • Lightweight & durable - alligator clip clamps on tight