Phorad® Precision Photometers
For over eight decades, the Spectra name has defined excellence in light
measurement. Continuing this legacy, Phorad® represents the next
generation of precision photometers engineered for radiography, medical
imaging, and NDT display quality assurance. The name Phorad originates
from Photo and Radiation, symbolizing its purpose — the accurate
measurement of light and radiant energy across a broad spectral range.

Built with the same commitment to scientific precision that has guided
Spectra since 1940, Phorad® photometers combine advanced optical design,
NIST-traceable calibration, and rugged engineering for dependable
performance in laboratory and field environments. Each instrument reflects
Spectra’s uncompromising pursuit of accuracy, reliability, and innovation in
light measurement technology.