Notifier NFXI-TFIX58

OPAL Heat detector, fixed 58ºC

Condition: New
Brand: Notifier
Status: Active
SKU: 123068
Manufacturer Part #: NFXI-TFIX58


The Opal NFX-TFIX58 & NFX-TFIX78 are fixed temperature analogue addressable sensors employing low mass thermistors and microprocessor technology for fast response and linear temperature sensing. Their linear response allows these sensors to be used to signal temperatures over the range of 58°C (Class A1S) to 78°C (Class BS). The Opal NFX-TDIFF uses the same thermistor and microprocessor technology to provide an alarm when the rate of rise in temperature exceeds 10°C/minute (typical) or if the temperature exceeds a threshold of 58°C (Response Class A1R). With the implementation of the advanced protocol, any model can be software configured to be either a fixed 58°C, a fixed 78°C unit or a 58°C with rate of rise device. For backwards compatibility and approval continuity, three separate versions continue to be available as separate part numbers.

Additional information

Weight 0.19 lbs
Dimensions 4.02 × 4.02 × 2.40 in





Unit of Measurement

EA (Each)

Production Status



  • Built in short circuit isolation
  • New advanced Opal protocol allows mapping of the loop for precise fault location using isolators
  • Tri color LED offering red, green and amber colors
  • Rotary decade address switches
  • Pure white color to complement modern buildings
  • 100% mechanical and electrical backwards compatibility
  • Base designed to ease installation and wiring

OPALTM Detector range


Notifier - Data Sheet