The XP95 heat detector is distinguishable from the smoke detectors by its low airflow resistance case which allows good contact between the sensing thermistor and the surrounding air. The device monitors temperature by using a single thermistor network which provides a voltage output proportional to the external air temperature. The voltage signal is processed and transmitted to the control equipment. The micro-processor in the control equipment then compares the signal with the stored data and initiates a pre-alarm or fire alarm. When the equipment determines that a fire condition exists, it instructs the detector to switch on its indicator LED and the pre-planned alarm routine is initiated.
A heat detector (XP95HDh) for use in ambient safe temperatures of up to 50°C and which reaches the alarm level at 90°C is also available.
Protector Alarms (UK) Ltd.