Apollo 55000-127 Series 65 BR Conventional Heat Detector 75°c.
The Series 65 Heat Detector monitors temperature by using a dual thermistor network which provides a voltage output proportional to the external air temperature.
The detector has a moulded self-extinguishing white polycarbonate case. Nickel plated stainless steel wiper contacts connect the detector to the base. Inside the case a printed circuit board holds the signal processing electronics.
If air temperature increases slowly, no significant resistance difference develops between the thermistors, but at high temperatures a fixed value resistance connected in series with the insulated thermistor becomes significant.
When the sum of the resistance of the insulated thermistor and the fixed resistor compared to the resistance of the exposed thermistor reaches a preset value, an alarm is initiated. The value of the fixed resistor is selected to set the detector into alarm state at a specified fixed temperature.
- Can be used for applications where smoke detectors are unsuitable
- Ideal for environments that are dirty or smoky under natural conditions
- Wide operating voltage
- Flashing LED and magnet operated test switch option
- Please note bases are supplied seperately