photometer
instrument that measures the strength of electromagnetic radiation in the range from ultraviolet to infrared and including the visible spectrum
spectrophotometer
deals with visible light, near-ultraviolet, and near-infrared, but does not cover time-resolved spectroscopic techniques
Kepler photometer
instrument on the Kepler spacecraft
photoelectric flame photometer
laboratory device that carries out a quantitative flame test
light meter
device used to measure the amount of light
High Speed Photometer
former instrument on the Hubble Space Telescope