Apollo Discovery Marine Multi-Sensor Detector (Optical/Heat) [SIL2] (58000-700MAR)

The Apollo 58000-700MAR Discovery Marine Multi-Sensor Detector consists of optical smoke and thermistor temperature sensors which give a combined signal for improved false alarm management.

The way in which the signals from the two sensors are combined depends on the response mode selected. The five modes provide response behaviour which incorporates pure heat detection, pure smoke detection and a combination of both. The multisensor detector is therefore useful over the widest range of applications.

The signals from the optical smoke sensing element and the temperature sensor are independent and represent the smoke level and the air temperature respectively in the vicinity of the detector. The detector's micro-controller processes the two signals according to the mode selected.

When the detector is operating as a multisensor (i.e. modes 1, 3 and 4) the temperature signal processing extracts only rate-of-rise information for combination with the optical signal.

In these modes the detector will not respond to a slow temperature increase - even if the temperature reaches a high level. A large, sudden change in temperature can, however, cause an alarm without the presence of smoke if sustained for 20 seconds.