The Chillgard LE Refrigerant Monitor can detect five of the most commonly used refrigerants from up to four remote locations. Standard features include water and chemical resistant enclosure, LCD display, 85Db buzzer, three levels of alarm, four relays, 4-20mA, 0-10V & RS-485 outputs. The Chillgard LE Refrigerant Monitor meets the requirements of ASHRAE 15 for detection below the TLV for refrigerant gases.