A Volatile Organic Compounds Detector is a gas detection VOC with two dry contacts and audible and visual alarms. Acme’s gas detection VOC - 2 is designed for enclosed spaces where chemical reagents or known VOC pollutants could leak into the air and pose a danger to personnel. This gas detection VOC 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.