Successful temperature measurement of non-greybody materials is difficult because complex emissivity variations occur with changes in surface oxidation, alloy composition, surface texture, temperature, or crystal structure.  Except under highly controlled conditions, traditional single- and dual-wavelength temperature sensors are unable to compensate for these variations.

Williamson’s unique multi-wavelength infrared thermometers use advanced ESP algorithms to solve this complex problem. ESP algorithms are computer-based empirical models that consider infrared energy, emissivity, and the measured wavelengths to properly compensate for the irregularities of non-greybody materials.

The graph below illustrates the accuracy of the multi-wavelength sensor on a typical non-greybody material, stainless steel. By using a stainless steel algorithm to compensate for the changes in emissivity, the multi-wavelength sensor provides superior results with an out-of-the-box ‘aim-and-read’ capability. Several application specific ESPs have been developed to produce comparable results with applications previously considered difficult to measure.

Each multi-wavelength sensor can include up to four menu-selectable, factory-programmed ESP algorithms as well as a dual/ratio mode for dual-wavelength measurement. It is also easy to create advanced ESP models that combine the ESP algorithms with the ESP filters to enable measurement of non-greybody materials under adverse operating conditions.

Other Resources to Download:

PRO SERIES WITH ESP BROCHURE