The PS-2 is a multipurpose gas monitor utilizing a MOS (metal oxide sensor) for long-lasting and low maintenance detection at the LEL or PPM levels of many gases or vapors. This stand-alone unit is housed in a durable plastic enclosure with flanges provided for wall mounting and is designed with easy access wiring hubs on the bottom of the unit. An internal audible alarm is built in which activates in a gas alarm condition. Each unit is powered by 115 VAC standard or 24 VDC as standard, and the AC version comes complete with a 6′ power cord.