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Free ground shipping available for orders over $250
D285DH - Bosch

D285DH - Bosch

D263TH - Bosch

D263TH - Bosch

D273TH - Bosch

Availability: In stock

D273TH Four+Wire Smoke/Heat Detector Four+wire smoke detector with a 135°F (57°C) heat sensor.

These 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.

D273TH Chamber Calibration Tests

Check the sensitivity and calibration of any of these detectors using a visual check, a magnet test, or a voltage measurement test. Refer to the D263/D273 Families Installation Guide for specific instructions to perform these sensitivity tests.

D273TH Mounting

The detector has a mounting plate that attaches to a standard four-inch back box. For commercial and industrial installations in accordance with NFPA 72, space each detector 30 ft (9.2 m) apart.

D273TH Wiring

The terminal block accepts up to 12 AWG (more...)

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