Apollo XPander Sounder Visual Indicator (Clear) & Optical Smoke Detector - XPA-CB-14024-APO

Apollo XPander optical detectors are recommended for use as general purpose smoke detectors for early warning of fire in most installations.

XPander optical detectors operate on the well established light scatter principle. The optical design of the XPander optical detector allows it to respond to a wide spectrum of fires.

The detector is calibrated so that XPander is highly reliable in detecting fires but has enhanced immunity to false alarms. The stability of the detector in terms of high reliability and low false alarm rate is further increased by the use of algorithms to decide when the detector should change to the alarm state. This removes the likelihood of a detector producing an alarm as a result of smoke from smoking materials or from another non-fire source.

This detector is combined with a sounder and visual indicator, providing detection and audio / visual alarm functions in a single device.

Operation

Photo-electric detection of light scattered by smoke particles over a wide range of angles. The optical arrangement comprises an infra-red emitter with a prism and a photo-diode at 90° to the light beam with a wide field of view. The detector’s microprocessor uses algorithms to process the sensor readings.

XPander sounders can be wall or ceiling mounted and use a bi-directional monitored radio platform to communicate. They feature 32 selectable tones, including the Apollo tone, and a self test which causes a fault signal to be sent if the sounders fail to operate. The self-test feature is activated by a DIL Switch.

Electrical Description

The sounders and sounder/visual indicators are powered by two packs of batteries, one with three “AA” and one with three “C” size alkaline batteries which provide a working life of typically 3-5 years. The three-year life includes weekly tests and a half-hour sounding in a fire condition.

The Sounder Visual Indicators incorporate audio and visual signalling within one unit.

Sound output: 100dB(A)

Radio Communications

Fire detection systems are life-saving systems and must, therefore, be highly reliable in use. Radio communications have been developed to a point where high reliability can be guaranteed, provided that the rules for the design of radio systems and installation are carefully observed.

Radio communication technology in the detection has matured to the point where a standard has been drawn up as part of the EN54 family of standards for components of a fire detection system. The standard is EN54 Part 25.

Frequency

The frequency used by XPander is 868MHz which is the harmonised European radio frequency.

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