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The AZ-10S detector reacts to the presence of smoke (visible smoke) and also to exceeding a high temperature in the room caused by fire. It has a built-in siren. It contains two separate detectors - an optical smoke detector and a heat detector . The optical smoke detector operates on the principle of scattered light and is very sensitive to larger particles, which are dense but is less sensitive to small particles from burning liquids such as alcohol, and so has a built-in temperature sensor. The microprocessor performs advanced digital analysis to avoid false alarms.

Technical specifications
- Power: Alkaline battery AA 1.5 V 2600 mAh (typical lifetime 1 year)
- Detection: air-borne smoke particles, temperature increase to 60 / 70 °C
- Dimensions. 125 x 65 mm
- Weight: 200 g