Description
Apollo XPander A1R Heat Detector (XPA-HT-11170-APO)
There are two heat detectors in the XPander range, designed to suit a wide variety of operating conditions. A Static Heat Detector (CS) which responds only when a fixed temperature has been reached and a Rate-of-Rise Detector (A1R) which has a fixed upper limit, but in addition, measures the rate of increase in temperature.
Operation
Heat detectors have an open-web casing which allows air to flow freely across a thermistor which measures the air temperature every 2 seconds. A microprocessor stores the temperatures and compares them with pre-set values to determine whether a fixed upper limit–the alarm level–has been reached. In the case of rate-of-rise detectors the microprocessor uses algorithms to determine how fast the temperature is increasing. Static heat detectors respond only when a fixed temperature has been reached. Rate-of-rise detectors have a fixed upper limit but they also measure the rate of increase in temperature. A fire might thus be detected at an earlier stage than with a static detector so that a rate-of-rise detector is to be preferred to a static heat detector unless sharp increases in temperature are part of the normal environment in the area protected by the heat detector.
Key Features
Wireless Can be used in applications where smoke detectors are unsuitable
Ideal for environments that are dirty or smoky under normal conditions
CS detectors are ideal for use in environments with rapid temperature fluctuations such as boiler rooms Bi-directional (monitored) radio platform
Five-year battery life using standard AA alkaline batteries
