Bosch D273THSR Four-Wire Smoke/Heat Detector with Sounder and Trouble Relay 85 dB at 10 ft. Horn, Photoelectric Also known as: DS-D273THSR, BOS-D273THSR The D273THSR is a fourwire smoke detector with a 135F (57C) heat sensor, a sounder, and a trouble relay. It is UL Listed and works with commercial fire protective signaling and household fire warning systems. It detects smoke particles produced during wood, paper, and fabric combustion. |
Features:
- 12 VDC or 24 VDC input
- Designed for commercial or residential use; four-wire application
- Light-emitting diodes (LEDs) indicate the status of the chamber, power, and alarm
- Removable terminal block to simplify wiring connections
- Cable connection point for voltmeter sensitivity test
- Trim Plate TP280 for retrofit and remodeling purposes
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