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are powered from a non-coded notification appliance circuit output and operate on a nominal 12 or 24 volts
the Siemens FP-11 Fire Detector is an excellent choice for those who require advanced and reliable fire detection technology
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System Sensor 4WT-B Photoelectric Smoke Detector 4-Wire Vesda are powered from a non-codedSystem Sensor 4WT B Photoelectric i3 Series Smoke Detector, 4 Wire, 135F Fixed Thermal Sensor, White The System Sensor 4WT B Photoelectric i3 Series Smoke Detector is a reliable and intelligent fire detection solution designed for commercial and residential applications. Featuring advanced photoelectric sensing technology combined with a 135F fixed temperature thermal sensor, the 4WT B provides enhanced protection by detecting both smoke and heat