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Bosch D273THES Fire & Intrusion Detector

The Bosch D273THES Fire & Intrusion Detector has been discontinued.
No direct replacement is available.
Please contact us for a suitable substitute.
Bosch D273 - 4 Wire smoke detector with therm istor, EOL relay/sounder
Bosch D273 Fire & Intrusion Detector Model Overview
The D273 Series Detector models use an infrared (IR) LED light source and a silicon photodiode to measure light in a chamber. A fine screen covers the chamber to deter insects and reduce dust accumulation and nuisance alarms. During a fire, smoke particles reflect light onto the photodiode. When the photodiode measurements exceed the alarm threshold, the detector signals an alarm condition. After the alarm condition clears, interrupt power at the control panel to reset the detector. When a D132B Reversing Relay Module is used, the LED does not latch on alarm.
Brand
Bosch
Model
D273
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