The Notifier NFX-TFIX78-IV is an Opal NFX-series analogue addressable high-temperature fixed heat detector with a 78 °C alarm threshold. This is the ivory version without an isolator.
It uses a low-mass thermistor and microprocessor technology for fast response and linear temperature sensing. Heat detectors like this suit areas such as boiler rooms, cold stores, poorly ventilated enclosed car parks and areas next to kitchens.
Key features
- Fixed 78 °C alarm threshold
- Two integral tri-colour LEDs (red, green and amber) for 360° local status indication
- Rotary decade address switches
- Opal digital protocol, allowing up to 159 devices and modules per loop, with reduced loop power consumption
- 100% mechanical and electrical backwards compatibility with earlier Notifier series
- Low-mass thermistor with microprocessor processing for fast, linear temperature sensing
- Ivory finish; no isolator
- Accessories include the B501AP base, WB-1AP weatherproof cap, SMK400EAP surface kit and RMK400AP recess kit
Technical specifications
- Operating voltage: 15 to 32 V DC
- Standby current: 200 µA at 24 V DC (no communication); 300 µA at 24 V DC (LED blinking)
- LED current at 24 V DC: 3.5 mA red, 7.0 mA green, 10.5 mA amber
- Operating temperature: -30 °C to +70 °C
- Relative humidity: 10% to 93%, non-condensing
- Height: 61 mm installed in a B501AP base
- Diameter: 102 mm
- Weight: 88 g
- IP rating: IP30 (IP33 with WB-1AP)
- Cable size: 2.5 mm²
- Material: PC/ABS
- Standard: EN 54-5
