A1R rate of rise heat detector. Monitors temperature by using a dual thermistor network. Ideal when smoke detectors are unsuitable. Perfect for dirty or smoky areas. Wide operating voltage. Technical Specification: Detection type - point type for fire alarms and detection in buildings. Supply voltage - 9 - 33 v DC. Supply wiring - 2 wires, polarity insensitive. Ripple voltage - 2v peak to peak max. at 0.1Hz to 100KHz. Quiescent current - 45 µa at 24v. Switch-on surge current - 115 µa at 24v. Alarm voltage - 6 - 28 v DC. Alarm current - 52mA at 24; 17mA at 9V. Alarm indicators - red LED. Design alarm load - 420Î in series with 2v drop. Holding voltage - 6v. Holding current - 10mA minimum. Min. voltage to illuminate indicator - 12V. Remote output characteristics - remote is a current sink to the negative line limited to 17mA. Storage temperature range - -30 °C to +120 °C. Operating temperature range - -20 °C to +90 °C (no condensation or icing). Humidity - 0% - 95% relative humidity. IP rating - 23D in accordance with BSEN60529. Detector dimensions (H x W x D) - 42 x 100 x 100mm. Detector weight - 80g. Detector in base dimensions (H x W x D) - 58 x 100 x 100mm. Detector in base weight - 131g. Material - polycarbonate housing with nickel plated stainless steel terminals. Manufacturer's part number - 55000-122
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