The GR3 retroreflectometer is a handheld instrument for measuring retroreflection of traffic signs. The GR3 measures the coefficient of retroreflection, RA, and meets all U.S. and European standards, including the FHWA MUTCD.
The unique triple geometry facilitates simultaneous measurements at various observation angles as proposed by ASTM. The RetroSign GR3 measures simultaneously at observation angles of 0.2 , 0.5 and 1 degrees. The internal memory stores up to 250,000 readings.
The photometric filter in the RetroSign GR3 is the most precise, sensitive and durable filter in the world. In combination with the point aperture geometry, it gives readings with laboratory precision for all colors and types of retroreflective sheeting and will determine if a microprismatic sign sheeting material has been applied correctly.
The RetroSign GR3 has a built-in precision WAAS GPS and an attachable barcode reader. Due to its robustness, barcode has become the optimum choice for field asset ID tagging and has proven itself superior to other technologies.
The RetroSign GR3 is designed to easily interface with current and future ID tagging and asset management systems. |
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Kit includes GR3 Retroreflectometer, carrying case, NiMH battery, 110V charger, USB cable, carry strap, calibrator, lens reducer & cover. |
- Meets FHWA & ASTM specifications
- Measures all types of retroreflective materials and colors directly without correction factors
- Simultaneous triple observation angle measurements
- Dual field aperture: 30mm and 15mm
- Unmatched precise, sensitive and durable optical spectral response
- Built-in precision WAAS GPS
- Attachable barcode tag reader (RFID tag reader optional)
- Internal storage for 250.00 measurements
- Lightweight & easy to use
- Road Sensor Control (RSC) program facilitates quick USB data transfer, processing and report generation
- Environmentally friendly Nickel Metal Hydride Battery
- Optional extension pole with remote control
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| Optical Specifications |
| Geometry |
ASTM-E-1709/WK9050: ÷4° / 0.2°, 0.5°, 1.0° |
| Entrance Angle |
-4° |
| Observation Angle |
0.2°, 0.5°, 1.0° |
| Field of measurement, Ø |
30 mm / 1.2 in. and Ø15mm /0.6 in. |
| Spectral Responsivity |
Illuminant A and V() efficiency according to ASTM E1709 section 6.4.2. for selected filters |
| Range (cd•lx-1•m-2) |
0 – 2000 |
| Instrument dimensions |
| Length |
295 mm / 11.6 inch |
| Width |
83 mm / 3.3 inch |
| Height |
324 mm / 12.8 inch |
| Weight |
2.0 kg / 4.6 lbs. |
| Gross Weight |
6.0 kg / 13.2 lbs. |
| Electrical Characteristics |
| Barcode Tag Reader |
CODE39 (16 Digit Barcode) |
| GPS |
WAAS |
| Power Supply |
Rechargeable & replaceable Nickel Metal Hydride 9.6 V, 2.4 Ah |
| External Charger |
230 V AC / 50 Hz; 110 V / 60 Hz Charge time approx. 15 minutes |
| Data Memory |
250,000 measurements |
| Data Retention |
Typically 5 years |
| Interface |
USB |
| Environmental Specifications |
| Temperature (Operating) |
0°C to + 50°C; 32°F to 113°F |
| Temperature (Storage) |
÷15°C to 55°C; 5°F to 131°F |
| Humidity |
Non Condensing |
| Standard Delivery |
| Carrying Case |
RSC Program |
| Calibration Standard |
Battery Charger |
| Ø15 Aperture Reducer |
Small Supporting Plate |
| Lens Cover |
Communication Cable |
| Quick Guide |
User Manual |
| SignTag™ RFID Disc |
| Function |
Provides born on date, locations & necessary inventory data for each sign |
| SignTag Diameter |
30 mm / 1.2 inches |
| Thickness |
3.2 mm / 0.13 inches |
| Diameter of Hole |
5 mm / 0.2 inches |
| Options |
| Extension Pole Kit |
| Extra Battery |
| Ø10 Aperture Reducer |
| Calibration Service |
| RFID reader & tags |
| Lens attachemtn for additional entrance angle of 30° & 40° |
| *All specifications subject to change without notice. |
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