The standard application product include two and four-wire models, available with or without a heat sensor. Auxiliary Form C relay models allow the detector to directly control functions such as elevator recall or release of door holders. And built in temporal tone sounder models provide audible annunciation at each detector. Every ten seconds self diagnostic circuitry monitors the chamber sensitivity, checking to see if the detector is still within its UL specification range. If it is, the detector’s LED continues to flash every ten seconds. If not, the LED stops flashing -a clear sign that the detector needs service or cleaning. This visual check meets the NFPA requirement for sensitivity testing. So, want to know if a 100 Series detector is within UL specification? Just look at it -simple, visual, clear.

TWIST OFF LID SPEEDS CLEANING One way System Sensor makes products that are false alarm resistant is by making them less likely to get dirty in the first place. A specially designed optical chamber resists dust build-up, significantly extending maintenance cycles. A refined insect screen creates a tight seal.