The VOC-2 detector is designed for enclosed spaces where chemical reagents or known VOC pollutants could leak into the air and pose a danger to personnel. This detector can cover up to 10,000 sq. ft. of clear, open space. It is designed to operate two-speed fans using two dry contacts that close at the appropriate low and high concentration levels for the toxic gas being detected. Standard calibration is with Toluene for set points at 1000 and 2000 PPM. Specific set-points for a wide variety of gases can be set at the factory. It also includes visual indicators on the front of the unit for low and high level with an audible alarm at the high level. The VOC-2 is constructed of heavy, damage-resistant PVC with vandal-proof screws. Units are available with integral (standard) or remote (optional) sensor heads. Typical installations include chemical storage facilities and personnel lounges in industrial buildings.