Photo-Heat, Photo, and Heat Detectors for Two-Wire and Four-Wire Bases

Simplex photoelectric and photoelectric-heat detectors provide many of the proven analogue sensing features for applications where detectors are connected to conventional two wire or four wire initiating device circuits (IDCs). Each detector has an onboard microprocessor that evaluates its photoelectric light scattering chamber activity. The onboard microprocessor makes an intelligent decision based on light scattering history as to whether an alarm condition is present.