The Context Plus XP95 multisensor detector contains an optical smoke sensor and a thermistor temperature sensor whose outputs are combined to give the final analogue value.
The multisensor construction is similar to that of the optical detector but uses a different lid and optical mouldings to accommodate the thermistor temperature sensor. The sectional view (below) shows the arrangement of the optical chamber and thermistor.
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Specifications are typical and given at 23°C and 50% relative humidity unless stated. Communication protocol: Apollo XP95 pulse 5-9V Detector type/principle: Smoke: Photoelectric detection of light scattered by smoke particles Heat: Temperature sensitive resistance Operating voltage: 17-28V DC Communications protocol: 5-9V peak to peak Quiescent current: 500µA average 750µA peak Power-up surge current: 1mA Maximum power-up time: 10s Alarm LED current: 3.5mA Remote LED current: 4mA at 5V Clean air analogue value: 23 +4/-0 Alarm level analogue value: 55 Alarm indicator: 2 colourless Light Emitting Diodes (LEDs); illuminated red in alarm, optional remote LED Storage: -30°C to +80°C Humidity (No condensation): 0 to 95% relative humidity optical sensor: None Vibration, Impact and Shock: To prEN54-7 IP rating: 43 Dimensions: 100mm diameter; 50mm height; 58mm (in base) Weight: Detector:105g; Detector in base:160g Materials: Housing: White polycarbonate V-0 rated to UL94; Terminals: Nickel plated s/steel Sampling frequency: 1 per sec
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