The Fyreye Class A1R (rate of rise) heat detector operates by utilising a matched pair of thermistors to sense heat. One of these thermistors is exposed to the ambient temperature, while the other is sealed inside the detector housing. Under normal conditions, both thermistors register similar readings. As fire develops, the temperature registered by the exposed thermistor will rise rapidly, resulting in an imbalance, causing the detector to go into its alarm condition.
Rate of rise heat detectors also have an upper temperature limit at which the detector will go into alarm if the rate of temperature increase was too slow to trigger the detector earlier.
Technical Specification
- Model : FEHR2000
- Supply Voltage : 9-33V DC
- Average Quiescent Current At 9V : 40μA
- Average Quiescent Current At 24V : 45μA
- Alarm Indication : Red LED
- Alarm Current At 9V : 17mA
- Alarm Current At 24V : 52mA Max
- Alarm Trigger Condition : Rise or 57°C
- Operating Temperature : -20° to +90°C (non condensing or icing)
- Max. Wind Speed : Not affected
- Remote Ooutpur Characteristics : Current Sink to -ve line (17mA max)
- Compatible Bases : FE-CB Fyreye Common Base, FE-DB Fyreye Diode Base, FE-RB Fyreye Relay Base, FE-SB Sounder Base, FE-SFB Sounder Flasher Base, FE-RB/AR 12V Auto Relay Base
- Detector Size (Without Base) : 100mm diameter x 40mm deep
- Weight (Without Base) : 77g
Datasheet
