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RetroSign GRX retroreflectometer

Model:RetroSign GRX

Use:The GRX retroreflectometer measures nighttime retroreflection of traffic signs, high visibility clothing, license plates and reflective tapes.

Standard:ASTM E1709/E2540/E1809, EN 12899/20471, GB 18833

Related Products
RetroSign GRX retroreflectometer for signs

 



RetroSign family the most frequently used retroreflectometer for signs
 

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.


 

Scalability in retroreflection measurements
 

Scalability of the GRX retroreflectometer – also after purchase – is an extremely powerful feature. Users can through software licensing upgrade their system in the field as their needs change. An upgrade only takes few minutes.

 

 

 

Tablet extention powers Internet of Things, IoT, connectivity
 

A tablet extension allows the user in the field to transfer measured retroreflection data for back-up, perform additional analysis and mapping, compare data to MUTCD sign library,  add visual identification to picture of artefacts in the sign, sending data instantly to the company back office and in general serve as an Internet of Things, IoT, terminal.


 

Point based technology for correct results with modern sheeting
 

From the days of glass-bead based, symmetrical sign sheeting, two methods of measuring retroreflectivity exist, 1) the annual geometry based method and 2) the point geometry based methods. However, with modern microprismatic sheeting, a technology that is nonsymmetrical, only the point based method provides correct measurement results.

GRX employs the point geometry based method for measurment of sign retroreflectivity, thus ensuring correct measurements in addition to allowing the user to detect if direction sensitive microprismatic material has been correctly mounted.

 


 

Highly versatile in applications
 

RetroSign GRX is offered with up to 7 observation angles and a standard entrance (also called illumination) angle allowing for ASTM (-4°) or CEN (+5°) geometry. Standard models include GRX-1, GRX-3 and GRX-7. Entrance angles can be supplemented with 10°, 15°, 20°, 30°, 40°, 45° extensions.

Other features are: automatic color recognition, color contrast (background and legend colors), fast calibration using scan of QR code and data presentation in existing software programs.


 

Large memory simplifies retroflectometer usage
 

The internal memory stores more than 2 mio. readings excl. photo or more than 2.000 measurements with photo allowing for many hours on the road before data transfer is needed.
RetroSign retroreflectometers operate with a reproducibility of better than+/- 5 % and a repeatability of +/- 2 %.


 

DELTA accredited laboratory ensures traceability to PTB & NIST
 

RetroSign instrumets are calibrated using references from DELTA’s DANAK/ ILAC accredited laboratory with traceability to PTB and NIST.

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