Apollo Series 65 Heat Detector, A1R Rate of Rise Heat detector Apollo 55000-122

This is the Apollo series 65 heat detector, with Rate-of-Rise, MAT 50°C, MSRT 65°C A1R - Standard. In normal conditions, the two thermistors register similar temperatures, but, on the development of a fire, the temperature recorded by the exposed thermistor will increase rapidly, resulting in an imbalance of the thermistors and causing the detector to change to the alarm state. Part of the Rate of Rise Apollo detectors, designed to detect a fire as the temperature increases, but they also have a fixed upper limit at which the detector will go into alarm if the rate of temperature increase has been too slow to trigger the detector earlier.

• The heat detector operates by using a matched pair of thermistors to sense heat.
• One thermistor is exposed to the ambient temperature, the other is sealed.
• Class: A1R; Standard model;
• Application Temperature: 25degs typical, 50degrees max;
• Static respose temperature: min 54degs, max. 65degs;
• Heat Class A1R standard;
• Supply Voltage: 9 to 33V;
• Average quiescent current at 24V: 45microA;
• Average quiescent current at 9V: 40microA;
• Alarm Current at 24V: 52mA;
• Alarm current at 9V: 17mA;
• Alarm indication: red LED;
• Normal operating temperature(no condensation or icing): -20 to +90 degs Celsius;
• Max wind continuous: not affected;
• Remote output(R-) characteristics: current sink to -ve line, limited to 17mA.

Note: when using a remote indicator a current-limiting series resistor may be required.