For simultaneous analysis and alarm of up to four of any combination of O₂ deficiency, CO₂, SO₂, NO, NO₂, H₂, CO, CL₂, NH₃, H₂S, % RH, and temperature of ambient air.

Designed for monitoring of ammonia (NH3) in controlled atmosphere (C/A) fruit storage rooms, poultry farms, ammonia refrigeration equipment, or confined spaces.