Bosch Products


D265 Photoelectric Smoke Detector Head
  • 12 V or 24 V inputs
  • Mounts on low profile 6 in. (15 cm) base
  • Easy head removal for cleaning and servicing
  • Maintenance-free operation
  • built-in sensitivity test
  • Steady-on LED alarm indicator
D273 Photoelectric Smoke and Smoke and Heat Detectors
  • 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
D282A/D283A Photoelectric Smoke Detector Heads
  • 24 VDC input
  • Mounts on low-profile base
  • Easy head removal for cleaning and servicing
  • Two-wire and four-wire base options
  • Flashing Power-On LED
  • Steady-On Alarm LED
  • Remote Annunciation
  • Tamper-resistant Locking Base
D273THSR Four-Wire Smoke/Heat Detector with Sounder adn Trouble Relay
  • 12 VDC or 24 VDC Input
  • Designed for commercial or residential user; 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 sesitivity test
  • Trim plate TP280 for retrofit and remodeling purpose
D263 Photoelectric Smoke and Smoke and Heat Detectors
  • 12 V or 24 V Input
  • Designed for commercial or residential use
  • Two-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 sesitivity test
  • Trim plate TP280 for retrofit and remodeling purpose
D254/D255 Fixed-temperature Heat Detector Heads
  • Mounts on low-profile six-inch diameter base
  • Easy head removal for cleaning and servicing
  • Available in 135 F (57 Celcius) or 190 F (88 Celcius) fixed setings
  • Optional latching alarm LED
  • Tamper-resistant locking base
  • Smooth celling rating of 2500 ft2 (232 m2)
  • Mechanical heat sensor