Apollo Discovery Multisensor Detector

The Discovery Multisensor Detector consists of optical smoke and thermistor temperature sensors which give both a combined signal as well as a separate heat signal for improved false alarm management. The Discovery Multisensor construction is similar to that of the optical detector but uses a different lid and optical mouldings to accommodate the thermistor (heat sensor). The Discovery Optical/Heat Multisensor Detector contains an optical smoke sensor and a thermistor temperature sensor whose outputs are combined to give the final analogue value. 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 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. Response Modes: Mode 1 - has very high smoke sensitivity combined with high heat sensitivity. This gives a high overall sensitivity to both smouldering and flaming fires. Mode 2 - has a smoke sensitivity similar to that of a normal optical smoke detector. This mode is therefore equivalent to a standard optical detector. It is suitable for applications in which wide temperature changes occur under normal conditions. Mode 3 - has moderate smoke sensitivity combined with a moderate sensitivity to heat. This combination is considered the optimum for most general applications since it offers good response to both flaming and smouldering fires. Mode 4 - has lower than normal smoke sensitivity combined with high heat sensitivity. This makes it suitable for applications in which a certain amount of fumes or smoke is considered normal. Mode 5 - has no smoke sensitivity at all but gives a pure heat detector response meeting the response time requirements for a Class A1R detector in the European Standard EN 54- 5. In this mode the detector will respond to slowly changing temperatures and has a �fixed temperature� alarm threshold at 58OC. The analogue value in this mode will give the approximate air temperature over the range 15OC to 55�C. In Mode 5 the smoke sensor is still active though it does not contribute to the analogue signal. As a consequence, if the detector is used in a dirty or smoky environment the optical sensor drift flag may be activated in the heat only mode. Key Features: Ideal for a wide range of applications Enhanced false alarm management Recommended, in specific modes, for hotel bedrooms and hospital wards Unaffected by wind or atmospheric pressure Well-suited to sensitive environments Five EN 54 approved response modes Heat only and optical only options Remote test feature

Firesense is a leading independent UK distributor of fire detection, fire safety and security equipment, supporting professional installers and businesses across the country. Established in 1992 and based in Tunbridge Wells, the company has more than 30 years of experience within the fire and security industry.

Originally founded as a specialist manufacturer of conventional fire alarm control panels, Firesense has developed into a comprehensive supplier of fire detection, security, emergency lighting and life safety products. The company works with a wide range of recognised manufacturers, helping customers access reliable equipment for projects of different sizes and requirements.

Firesense supplies conventional, addressable, wireless and two-wire fire alarm systems alongside detectors, control panels, manual call points, sounders, cables, batteries, emergency lighting, fire alarm testing equipment and related accessories. Its expanding security range also includes CCTV, intruder alarm, access control and smart security solutions.

A key strength of Firesense is its experienced technical and account management team. Customers can receive practical product guidance and support when selecting equipment, designing systems or resolving technical enquiries. As an independent distributor, Firesense can recommend suitable products from across its available ranges rather than being restricted to a single manufacturer.

With extensive stock held at its Tunbridge Wells distribution centre, Firesense aims to provide fast and reliable nationwide supply, including rapid dispatch and trade counter collection.

For fire detection, security or life safety equipment, visit the Firesense website or speak with their experienced team for product advice, availability and help with your enquiry.

For more information on Apollo Discovery Multisensor Detector talk to Firesense Limited