Measures according to international CEN and ASTM standards at many angles
The GRX Online Sensor measures retroreflection and calculates the RA value according to international CEN and ASTM standards. It complies with the requirements stated in EN 12899, EN 20471, ASTM E 1709, ASTM E 2540 and ASTM E 1809 (discontinued).
Seven observation angles
The instrument can simultaneously measure entrance angles 0.2, 0.33, 0.5, 0.7, 1.0, 1.5, and 2.0 degrees, and we deliver it with either an ASTM entrance angle of -4 degrees or a CEN entrance angle of +5 degrees.
All types and colors
The sensor measures all types and colors of retroreflective materials, when calibrated with one single white retroreflective standard with known RA.