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.