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Ratio Pyrometer Technology Ratio Pyrometer Technology

Ratio Pyrometer Technology Ratio Pyrometer Technology

Country/Region china
Company Williamson limited
Categories Carbon Steel Wire Rod
Update 2017-04-25 15:33:18
ICP License Issued by the Chinese Ministry
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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.

There are two types of ratio pyrometer technologies, and Williamson is the only company to offer both. Two-Color technology uses a sandwich detector and a fixed set of wavelengths. Dual-Wavelength technology uses a single detector with two unique and selectable wavelengths which allows for all of the benefits of a Two-Color pyrometer plus some significant added capabilities.

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 1100F / 600C
  • 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 200F / 95C
  • Better tolerates scale, temperature gradients, and non-grey interference (20x smaller errors) due to greater separation between wavelengths.

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