radiometer
Etymology
From radio- + -meter.
radiometer means A device that measures radiant energy. Lexicurio rates it Rare gem — a strength score of 83 out of 100.
noun
- A device that measures radiant energy.“The geometry of the cone θ and the irradiance at the image of the carbon block were used to determine the absolute steradiancy of the energy in the cone θ as a radiometer calibration value.”