Model 922 Retro-Reflectometer
Products / Retro-Reflectometers - Signs / 922
The RoadVista model 922 is a handheld sign retroreflectometer designed for use in the field. It is designed to measure the retroreflection (RA ) of road signs and other materials. Since a significant portion of the vehicles on the road in the USA are now SUVs and pickup trucks, ASTM has drafted a specification to require measurements to be performed at an observation angle of 0.5 degrees. The 922 is the perfect instrument for this change-over. Utilizing the ASTM standard "annular" geometry, the 922 measures observation angles of 0.2 and 0.5 degrees simultaneously, with an entrance angle of -4 degrees. This patent-pending design allows you to know, with the press of a button, exactly how bright your sign will appear to most drivers. Plus, the annular geometry means you will not have to take an average of two measurements with prismatic-type materials, further simplifying the measurement process. A European version is available with a standard 0.33-degree observation angle and +5-degree entrance angle. The sensitive light sensor meets ASTM E1709 requirements with the CIE standard human eye response in conjunction with the CIE illuminant "A" lamp. Our world-class photometric filter fit is unmatched by the competition and allows extremely accurate measurements of other colors using the single white reference standard with no correction factors. |
