RetroSign GRX retroreflectometer for signs

Measurement of the Coefficient of retroreflected luminance RA (nighttime retroreflection) of road traffic signs, high visibility clothing, license plates and reflective tapes. Further entrance angles are offered as easy changeable front adapters for speciel measurement purposes: 10°, 20°, 30°, 40° and 45°. The instrument uses point aperture geometry which enables the user to determine if direction sensitive microprismatic sheeting is correctly positioned on a sign.

The GRX retroreflectometer measures nighttime retroreflection of traffic signs, high visibility clothing, license plates and reflective tapes. It is a handy instrument for use on the roads and in production. GRX is the new instrument in the RetroSign family that over the years has become the most widely used solution worldwide for measurements of traffic sign retroreflectivity and a de facto standard in many regions of the world.

GRX is intuitive in use. Measurements are taken in one second and data is easily transferred to a PC or a tablet. Built-in options for photos of signs, barcode reader, QR code reader, GPS, instrument rotation and tilt, sign facing direction and MUTCD sign library for automatic pass / fail of sign performance extend the instrument versatility significantly.

• Fast and simple calibration by scanning QR code
• Use of templates for uniform measurement series
• Automatic average calculation for 2 – 10 measurements
• Automatic pass/fail on colors and/or color contrast
• Sign background and legend contrast
• User ID
• Sign ID with multiple sign data entry options
• Data processing and mapping in existing software

• Built-in camera for picture of sign
• Built-in barcode and QR code reader
• Built-in GPS
• Built-in wireless communication
• Instrument rotation and tilt
• Sign face direction (compass)
• MUTCD library
• Additional entrance angles of 10°, 20°, 30°, 40° and 45°
• Extension Pole Kit, 1.5-2.7 m / 4.9-8.9 feet
• App for data back-up, processing and mapping on tablet

Standard delivery

• RetroSign GRX instrument
• One angle adapter (-4° ASTM, +5° CEN)
• Carrying case
• Calibration reference with DANAK calibration certificate
• Two batteries
• Battery charger (110 or 230 V)
• Quick guide
• User manual is available on www.roadsensors.com
• USB memory stick for data transfer