SD-283ST Wired combined smoke and heat detector with built in siren
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.
Tekniske specifikationer
| Power | 9 – 15 V DC / 3.5 mA (150 mA during an alarm) or 3 pcs of AA 1.5 V alkaline batteries Please note: Batteries are not included |
|---|---|
| Typical lifetime | approx. 3 years |
| Smoke detection | optical light scattering |
| Smoke detector sensitivity | m = 0.11 - 0.13 dB / m pursuant to EN 14604:2005, EN 54-7 |
| Heat detection | class A1 according to EN 54-5 |
| Alarm temperature | + 60 °C to +65 °C |
| Operating temperature range | -10 °C to +65 °C |
| Dimensions, weight | diameter 126 mm, height 52 mm, 150 g |
| Conformity | EN 50130-4, EN 55022 |
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