Absolute Differential Radiometer

Publisher Website
Google Scholar
Abstract
A radiometer is described which is calibrated on an absolute basis from its geometric and physical parameters. An estimated 3% accuracy is achieved using common handbook values for the physical parameters. Experiment confirms the calibration, including predicted dependence of sensitivity on temperature. The instrument gives integrated response to diffuse thermal radiation exchanged between surfaces at normal room temperature. When used with a commercial microvoltmeter, the present device measures net heat fluxes ranging from 0.1 to 100 Btu/h‐ft2. It responds quickly to changes in incident flux and reaches equilibrium within about 1 min. It is sufficiently rugged and stable for practical field work and is suggested as a tool for research and teaching.

This publication has 7 references indexed in Scilit: