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Leeds & Northrup Pyrometers (IR & Optical)



recorders controllers parts systems test equipment
bench repair overhaul "before & after" transmitters IR & optical

Process Instruments provides complete calibration and repair service to L&N Pyrometers.



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Please supply a complete model number or specifications for a quotation. (For email requests please supply the model number.)

Process Instruments provides the highest quality calibration and repair to L&N Pyrometers and Rayotubes. Our pyrometry standards, acquired from Leeds & Northrup's calibration lab when L&N moved from its North Wales facility, are characterized by NIST, assuring the highest accuracy. Pyrometers can be calibrated up to 3500°C (6400°F)

Infrared thermometer calibration is performed with an Isotech spherical blackbody furnace, a near-ideal source. Higher temperature infrared calibration is performed with a Mikron blackbody source. Near ambient temperatures are checked with an Electro-Optical blackbody, accurate to 0.02°C.

Click on the images below to view a larger version of each.


L&N's Carbon Arc Standard
2000°C - 3538°C

Mikron Infrared
Black Body Furnace
300°C - 1700°C

Ribbon Filament Facility
800°C - 2300°C
1472°F - 4172°F

This Isotech spherical furnace provides a near-ideal emittance source for Infrared calibration.

An Electro-Optical near-ambient blackbody source gives 0.01°C resolution.

Rayotube Calibration, Repairs and Accessories

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615 Carson Street
Pittsburgh, PA 15203-1021
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