The PR-524 features a cosine corrected receptor, and measures illuminance. For luminance measurements,the optional PR-522 SpotMate replace the standard cosine receptor.
Handheld Illuminance Photometer System - PR-524 LiteMate
PR-522 SpotMate featuring true Pritchard spot optics can be added to make luminance measurements.
PR-524 features a touch-screen display, USB I/F and a multimedia card slot. Other accessories include a fiber probe and micro-reader probe.

Main features:
• Illuminance / Luminance measurements
• back Lit / Touch screen display
• USB Interface
• Multiple measurement heads

Applications:
• Area illumination
• Projector output
• Screen brightness
• Architectural lighting
• Projector uniformity