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Environment, Health, Safety & Security

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An ammonia leak-detection system for process refrigeration

| By Mary Page Bailey and Gerald Ondrey

The Chillgard 5000 NH3 monitoring system (photo) features a sophisticated design with photoacoustic infrared (PAIR) sensors that provide an easy-to-install, highly reliable gas-detection solution specifically for ammonia. The systems are compliant with ANSI/International Institute of Ammonia Research (IIAR) and EN378 requirements, making them useful in a number of industries that require refrigeration or freezers. PAIR sensing offers the earliest level of detection of NH3 leaks for plant safety. Unaffected by temperature and humidity swings, PAIR sensors operate for months with virtually zero drift, says the company. In the event of an NH3 gas leak, the Chillgard 5000 System provides a clear visual and loud audible signal to indicate that there is a potentially dangerous and expensive leak. In addition, the Chillgard 5000 Remote Display provides gas-monitor information before room entry where potentially hazardous gas levels may exist. — MSA Safety, Inc., Cranberry Township, Pa.