The WDGT SUPPLY 4-Gas Monitor provides simultaneous real-time detection of oxygen (O2), combustible gases (LEL), carbon monoxide (CO), and hydrogen sulfide (H2S) — the four gases required by OSHA for most confined space entry permits. The integrated motorized pump draws samples from distances up to 100 ft, allowing pre-entry atmosphere testing before anyone goes in. Audible alarm at 95 dB, flashing LED array, and vibrating body alarm ensure alerts are noticed in noisy environments. Large backlit LCD displays all four readings simultaneously. Rated IP67 for water and dust ingress. Calibration due indicator and datalog export via USB.