Kendall Absolute Radiometers

Product Details

Due to production and obsolescence issues, the Kendall Radiometer Product Line has been discontinued.
We will continue to provide service and repair for existing units, however we will not be able to take new production orders.

Kendall radiometers are self-calibrating cavity radiometers which provide an accurate absolute standard for total irradiance. The radiometer receiver is a blackbody cavity which has an electrical heater installed so that substituted electrical heating is equivalent to the incoming irradiance at the radiometer aperture. By accurate measurement of the electrical power to the calibration heater, together with the thermopile response, the radiometer is calibrated without reference to other standards. These radiometers were originally developed by J.M. Kendall, Sr. and C.M. Berdahl at NASA-JPL as reported in Applied Optics 9(5): 1082-1091 in the 1970’s. They have been manufactured by Raptor Scientific since 1996, to the original Kendall/Berdahl and TMI drawings and specifications. Raptor Scientific is the only  

Applications 

• Kendall Radiometers produced by Raptor Scientific are primarily used for the testing of satellites 
• The products are also used in the green power industry with solar panels and solar concentrating power plants 
• They have the ability to measure up to 20 solar constants (20x the power of the Sun)

There are six Kendall absolute radiometers currently offered, with three different Control Units