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 San
Diego, Calif., April 5, 2005 - Gamma Scientific has announced the Model 922, the industry's first handheld retroreflectometer capable of simultaneous 0.2° and 0.5° retroreflection (RA) measurement of road signs and other materials.
"Because a significant portion of the vehicles on the road in the USA are now SUVs and pickup trucks, ASTM has drafted a specification that requires measurements to be performed at an observation angle of 0.5°, in addition to the traditional 0.2°," said Eric Nelson, senior physicist and sales manager of Gamma Scientific. "The 922 is the perfect instrument for this change-over. Utilizing the ASTM standard annular geometry, the 922 measures both observation angles simultaneously, with an entrance angle of -4°."
Simple, straightforward operation is another
hallmark of the 922's patent-pending design.
At the push of a button, the operator knows exactly
how bright a sign will appear to most drivers;
both 0.2° and 0.5° measurements display simultaneously on the 922's large LCD. To further simplify the measurement process, the unit's annular geometry eliminates the need for averaging two measurements with prismatic-type materials. A European version is available with a standard 0.33° observation angle and +5° entrance angle.
The 922 also features an internal global positioning
system (GPS), a barcode reader, internal memory
that stores approximately 4500 measurements and
a USB interface for downloading stored data.
Remote IrDA control is also included for measuring
hard-to-reach signage.
The 922's sensitive light sensor meets ASTM
E1709 requirements with the CIE standard human-eye
response in conjunction with the CIE illuminant "A" lamp.
Moreover, Gamma Scientific's world-class photometric filter fit is unmatched
by the competition. It enables extremely accurate measurements of other
colors using the single white reference standard with no correction factors.
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