Liu Research Laboratories, LLC
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Spectropyrometer

Our patented alexandrite effect spectropyrometer measure high to ultrahigh temperature measurement from 1000 K up to 100,000 K. The spectropyrometer measures the relative spectral power distribution of a radiating body in the UV-VIS-IR wavelength range, integrates the relative spectral power distribution in the whole wavelength range, and determines the temperature using the patented method. The spectropyrometer can measure any type of radiating bodies: blackbody, graybody, plasma, electric arc, etc. The probe with a heat resistant window can be installed in the most harsh environments, such as combustion chambers, gas turbine, furnace, electric discharges tubes, and etc. The spectropyrometer is invented to measure and control temperature for research, developments, and industrial applications in the fields of, but not limited to, metallurgy, high energy physics, combustion, plasma, and etc.  The spectropyrometer has the functions of displaying the spectrum of the measured target, on-screen spectral correction, temperature scale exchange, signal control and etc.

Patent No.: US 7,004,624 and 7,052,177.

New Portable Design:

Zoom Telescope Design:

  Measurement window of the spectropyrometer

Specifications:

Temperature ranges:
    LASP1200             1000 - 2,500 K                        
    LASP2200             1,800 - 5,000 K
    LASP3200             3,000 - 10,000 K
    LASP4200             5,000 - 50,000 K
    LASP5200             10,000 - 100,000 K

Wavelength ranges:    380 - 760 nm

Accuracy:
    < 0.5% on blackbody and gray body targets.
    < 1.0% on targets with spectral lines (after spectral correction).

Temperature Resolution:    1 ⁰C
 Wavelength Resolution:     1 nm

Collimator:
    Focal Length:             0.7 - infinite M
    Working Distance:    1.0 -10.0 M
    Objective Lens:        20x
    Minimum Target Size:    1.0 mm at 1 M

Temperature Measurement of the Radiating Bodies with Spectral Lines

The spectropyrometer can measure the temperature of a radiating body with any  type of spectrum, such as the line spectra of plasma and and mixed spectrum of  a laser with a gray body. The following measurement window shows the temperature measurement of a radiating body with a mixed  laser spectrum for demonstration purpose:

The spectral line centers at about 661 nm. Only the new invented spectropyrometer can correctly measure this type of radiating body. In fact, it can measure the temperature of any radiating body with multi-lines of spectrum accurately, since the newly invented method integrated the whole wavelength, therefore, every spectral line is integrated for determining the temperature.

On other hand, if the spectral line is a noise overlap the continuous spectrum, the spectral correction function can eliminate the spectral line. Then  the temperature corresponding to the continuous spectrum can be determined, as the following screen:

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Copyright © 2003 Liu Research Laboratories, LLC, 2202 Seaman Avenue, South El Monte, CA 91733.
Last modified: December 07, 2006