The Chillgard LS Refrigerant Monitor is a stand-alone sensor for detection of the five most commonly used refrigerant gases. (R-11, R-12, R-22, R-123 and R-134a) Standard features include water and chemical resistant enclosure, five LED's to indicate power, alarm and fault conditions, 4-20 mA output and RS-485 ModBus output for communication to the Chillgard LC Control Module. The Chillgard LS Refrigerant Monitor sensor module meets the requirements of ASHRAE 15 for detection below the TLV for refrigerant gases.