Search Unit D for Model 577PC & 577A
( similar to Y search but with a 3″ aperture ) Includes black standard and reflectance standard.
Photovolt offers three different search units for specific applications, allowing the precise measurement of sample color characteristics when used in conjunction with the Photovolt Model 577PC or 577-A.
SEARCH UNITS “Y” OR “D” use tristimulus filters and measure diffuse reflectance, paper opacity or hiding power. The “Y” unit has a 0.81″ aperture. The “D” unit has a 3″ aperture.
The SEARCH UNIT “W” comeswith a preinstalled blue filter designed to measure paper brightness.