Sixteen-page brochure describes Sensidyne systems used to detect wide range of toxic and combustible gases at fixed installations. Gives specifications and part-number order information for transmitters and other components, including low-cost models for combustibles, infrared gas models, universal 4-10 mA models, and universal RS-485 models, plus line of 1-, 2-, 4-, 8-, and 16-channel controllers. Also includes information on Sensalert intelligent sensors and sensor and transmitter accessories. Table recommends specific sensor models for detecting concentrations of certain gases and vapors and offers high/low set points, maximum p.p.m. detection capability, explosion-proof compatibility, and environmental limits.