SD283ST - Wired Smoke and Heat Detector with Siren

SD283ST - Wired Smoke and Heat Detector with Siren
Our Price:  £41.00(£49.20 Inc. VAT)



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A 12V powered heat and smoke detector with volt free contact closure output alarm.

Special Offer:  Discounts of 7%, 10%, 12.5% and 15% are available when you order 10, 25, 50 and 100 items or more of this product.

  • Voltage: 9 – 15 V DC / 3.5 mA (150 mA during an alarm) or 3 pcs of AA 1.5 V alkaline batteries (approx. 3 years life)
  • Alarm Output: Normally closed dry contacts
  • Smoke detection: optical, light dispersion
  • Fire-alarm temperature +60 °C to + 65 °C
  • Acoustic power of the built-in siren: min. 85dB / 3 m
  • Operational temperature range: -10 to +65 °C
  • Dimensions: diameter 126 mm, height 52 mm
  • Complies with EN 50130-4, EN 55022

The SD-283ST is used to detect fire hazards in the interior of residential or commercial buildings. The detector is also suitable for installing in caravan trailers or mobile homes. The product is not designed to be installed in industrial premises. The detector indicates fire hazard using the built-in LED indicator and acoustic signalling. The detector can also be powered from an external 12 V DC source or from the alarm system control panel and it provides ALARM and TMP outputs. When the detector is used with inserted batteries (3x 1.5 V AA), it can continue operating as a stand-alone detector when the external 12 V power supply is disconnected.

The SD-283ST consists of two independent detectors – an optical smoke detector and a heat detector. The optical smoke detector works on the principle of scattered light. It is very sensitive to large dust particles which are present in dense smoke. It is less sensitive to smaller particles generated by the combustion of liquids such as alcohol. That is why the fire detector also contains a built-in heat detector which has a slower reaction but is much better at detecting fire which generates only a small amount of smoke

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