Bosch D285TH Photoelectric Smoke Detector Head with Heat Sensor None

Bosch D285TH Photoelectric Smoke Detector Head with Fixed-Temperature Heat Sensor The D285 and D285TH detector heads detect the large smoke particles which typically result from wood, paper, and fabric combustion. The D285TH smoke detector also has a +135°F (+57°C) fixed temperature heat sensor. Use in areas where the ambient temperature does not exceed +100°F (+38°C). These detectors are compatible with two-wire or four-wire, 12VDC or 24 VDC circuits. Also available are addressable bases for use on the POPEX bus. These detectors have two components: the detector base and the detector head. The base is permanently attached and wired to a back box. The interchangeable heads quickly detach for replacement and cleaning without affecting circuit wiring. Key Features: Designed for commercial