There are three distinct Single-Wavelength pyrometer technologies: Short-Wavelength, Long-Wavelength, and Specialty-Wavelength. Single-Wavelength pyrometers are preferred when appropriate due to simpler, lower-cost technology. For most applications, select the shortest wavelength compatible with the measurement conditions and desired temperature span. Specialty wavelengths may be necessary depending on the optical and emissivity properties of the target. No matter your application, Williamson has the industrial infrared thermometer technology to suit your needs.
- Short-wavelength sensors are often 4-20 times less sensitive to emissivity variation compared to long-wavelength sensors
- By selecting the correct wavelength span, Williamson pyrometers make it possible to view through water, steam, flames, combustion gases, and plasmas.
As a result, Williamson short-wavelength pyrometers provide superior performance over a wide range of real-world operating conditions.
Specialty-wavelength pyrometers are used when the target is least reflective and most opaque at a specific wavelength or when optical obstructions are most transparent at a specific wavelength. For example, at 7.9um polyester film is opaque. So pyrometers filtered at this special wavelength are appropriate for making this measurement.
Pro Series Products
The Pro Series is Williamson’s signature line of pyrometers which has been designed specifically for demanding industrial applications. It includes
Short-Wavelengths Reduce Error from Emissivity Variations
For most applications, selecting the shortest practical wavelength is recommended. As indicated in the chart, shorter wavelengths result in smaller errors and are 4-20 times less sensitive to emissivity variation compared to long-wavelength sensors.
Single-Wavelength Error Due to 10% Optical Obstruction, Misalignment, or Emissivity Variation
Short-Wavelengths Can View Through Optical Obstructions
Wavelength selection is a critical factor in Williamson’s short-wavelength technology. By choosing the correct wavelength span, you can view through water, steam, flames, combustion gases, plasmas and other common industrial interferences.
Popular Single-Wavelength Applications
- Melt Shop & Caster: Ladle-Tundish Preheat & Stationary Shroud
- Primary Steel & Iron: Amalgamation/Pelletization Kiln
Sinter Plant Cooling Bed
- Steel Hot Rolling Mill: Reheat Furnace Entry & Steel Rolling Stands & Steel Coiler
- Rotary Kiln
- Annealing & Finishing: Cold Mill, Down Leg Cooling & Paint-Line Primer
- Forging: Flame Fired Furnace & Static Die Measurement
- Aluminum Extrusion: Quench Confirmation & Die Measurement
- Incinerators & Power Boilers
- Oilfield Tubular: Quench Confirmation
- Building Materials
- General Purpose
- Primary Steel & Iron: Hot Blast Main
- Annealing: Temper Mill Entry & Paint Line
- Steel Hot Rolling Mill: Laminar Quench & Hot Metal Detector
- PCVD: High Density Plasma Cloud
- Molten Metals: Plasma Electron Iron Beam
- Rotary Kiln: Flame Temperature
- Additive Manufacturing
- Flat Glass
- Thin Film Plastics
Options & Accessories
AP – Air Purge
SB – Swivel Bracket
PCJ – Protective Cooling Jacket
IM – Interface Module
Consult with one of Williamson’s Temperature Experts
We would love to discuss your temperature measurement application with you.