The Haloguard® III is a multichannel, multigas refrigerant monitor designed to continuously monitor R-11, -12, -22, -134a, -123 and other refrigerants commonly used in air conditioning systems, machinery rooms, and refrigerant storage areas, the company says. The solid-state electronic unit detects the presence of halocarbon refrigerants and oxygen depletion. Up to two additional remote modules may be located up to 1,000 ft from the central controller. The user may adjust min/max alarm levels independently for each sensor.

Thermal Gas Systems, 11285 Elkins Rd., Bldg. H-1, Roswell, GA 30076; 800-896-2996 or 770-667-3865; 770-667-3857 (fax); thermalgas@mind (e-mail); www. (website).