Emissiometer K1

This emissiometer is dedicated to quality assurance measurements of coated plane sample surfaces used as solar absorbers in flat-plate collectors for low temperature application. An integrating sphere with diffuse gold coating provides diffuse IR-radiation on a sample area with a diameter of 10mm.

The direct reflectance is measured in the wavelength range from 8µm to 14µm and the direct direct emittance is computed by 1 – reflectance for opaque samples.