Willliamson Ratio Pyrometer Technology

Ratio pyrometers are different from single-wavelength pyrometers in that they measure infrared energy at two wavelengths instead of one. The ratio of energy between the two measured wavelengths is then converted into a temperature value. This method of measurement allows ratio pyrometers to compensate for emissivity variation, partially filled fields of view and optical obstructions.

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CTH Industrial Controls can provide you with service and start up assistance for Williamson Technologies.



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Popular Ratio Pyrometer Applications

  • Steel Mills
  • Casting, Forming, Joining, and Heat Treating of Metals
  • Induction, Resistance, Friction, Flame, and Laser Heating
  • Forging Plants: Billet, Die, Heat Treat
  • Wire, Rod, and Bar Mills
  • Rotary Kilns, Thermal Reactors, and Solid Fuel Power Boilers
  • Engineered Materials: Silicon Crystals, CVD Diamonds, Carbon Densification, High Temperature Ceramics
Two-Color Pyrometers Dual-Wavelength Pyrometers
  • General purpose wavelength set
  • Compensate for variable emissivity and modest optical obstruction or misalignment
  • Used when there is a clear optical path between the pyrometer and target
  • Measure temperatures above 1100ºF / 600ºC
  • Ideal for scale-free and uniformly heated ferrous material
  • Carefully selected wavelength set
  • Compensate for variable emissivity, temperature gradient, severe optical obstruction, and misalignment
  • Wavelength set may be selected to view through water, steam, flames, plasma, etc.
  • Measure temperatures above 200ºF / 95ºC
  • Better tolerates scale, temperature gradients, and non-grey interference (20x smaller errors) due to greater separation between wavelengths.