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Impac 50-LO/GL Series Pyrometers


Fiber optics pyrometer for non-contact temperature measurement of molten glass. Temperature range 600 to 1800 °C.


The Impac® IS 50-LO/GL digital pyrometer, primarily employed for temperature measurement in glass tanks, working-end forehearths, and feeder applications, also finds utility in measuring brickwork temperatures in regenerators and tanks. With the two-wire technique at its core, the instrument merges the high accuracy of digital signal processing with the simplicity of two-wire connection and operation. Notably, the inclusion of a robust fiber optic cable, extending up to 30 meters, ensures its functionality in ambient temperatures up to 250 °C, eliminating the need for cooling and broadening its range of application.


  • Adjustable emissivity directly on the device
  • Adjustable response time and subrange via interface
  • Optional integrated air purge with Inconel or ceramic sighting tubes
  • Standard fiber optic cable of 5 m with optional lengths available: 10, 15, and 30 m


  • Achieve high accuracy due to output digital linearization
  • Select from different sighting tubes (ceramic or Inconel) to optimally adapt to applications
  • Operate the instrument in ambient temperatures up to 250°C without cooling
  • Easily install by separating the optical head and converter from the fiber optic


Operational temperature range (°C): 600 to 1800 °C
Spectral Range (µm): 0.8 to 1.1
Measurement Uncertainty (°C): From 03% oR + 1 °C
Optics (mm): Fixed optics
FOV (minimum spot size) (mmm): Min. 110:1 (9)
Alignment / Sighting: None
Interface / Output (mA): 0/4 to 20 mA
Exposure Time t90 (ms): 250 ms
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