Absolute Method Retro-Reflective Coefficient Tester
The Absolute Method Retro-Reflective Coefficient Tester is a precision instrument designed to evaluate the retro-reflective performance of high-visibility safety materials under both dry and simulated rain conditions. It accurately measures the retro-reflection coefficient of sample surfaces, making it suitable for occupational high-visibility warning garments and other visibility safety apparel to ensure personnel safety and compliance with national standards.
Application
The tester is suitable for a wide range of applications:
Traffic Safety Materials: Assessing retro-reflective performance of road and railway signs, traffic safety uniforms, and school uniforms for visibility compliance.
Occupational Safety Garments: Evaluating high-visibility protective clothing worn by various professionals for safe warning and visibility.
Vehicle Inspection: Measuring reflective markings on trucks and commercial vehicles.
Quality Control: Testing reflective vests, license plates, and other materials for retro-reflective compliance.
Standards
The system supports compliance with the following standards:
GB 20653-2020 – Occupational High-Visibility Warning Clothing, Appendices C.4.1 (Absolute Method) and D
GB/T 28468-2012 – School Traffic Safety Reflective Uniforms
ASTM E808 – Standard Guide for Description of Retro-Reflective Materials (Reference)
ASTM E810 – Standard Test Method for Retro-Reflective Coefficient of Sheeting Materials (Reference)
DIN 67520 – Minimum Luminance Requirements for Traffic Safety Reflective Materials (Reference)
Parameters
| Parameter | Specification |
|---|---|
| Retro-Reflective Coefficient Range | 0.01–500 cd/(lx·m²) |
| Observation Angle | 12′–120′ (2°) adjustable, precision 3′, minimum division 1′ |
| Incidence Angle | 0.1°–40.0° adjustable, precision 0.5°, minimum division 0.1° |
| Sample Size | 150 × 150 mm |
| Light Source | Standard illuminant A as per GB/T 3978 |
| Sample Reference Center to Light Aperture | ≤12′, vertical illuminance uniformity ≤5% |
| Sample Reference Center to Detector Aperture | ≤12′, vertically adjustable for 12′–120′ observation |
| Detector Distance to Sample | ≥15 m |
| Wet Test Parameters | Spray nozzle 1000 mm from sample, 10°±1° vertical angle, uniform water flow, enclosed spray chamber, water flow equivalent to 284 mm/h |
| Spray Chamber | Rigid transparent material with movable panel, 150 × 150 mm light channel, black-painted edges to reduce scatter |
| Spray Nozzle | Diameter 1.19 mm, connected to supply tube for stable conical water column |
| Power Supply | AC 220 V, 50 Hz, 1 kW |
| Main Console Dimensions | 900 × 780 × 1700 mm |
| Sample Table Dimensions | 630 × 430 × 1900 mm |
| Sample Table Weight | 80 kg |
| Main Console Weight | 115 kg |
| Test Environment | Dark room, temperature 20°C ±2°C, humidity 65% ±5% |
Features
High-resolution microphotometric acquisition system for precise measurements
Infrared distance measurement for accurate positioning between main console and sample table
Wireless communication module for cable-free control and data transfer
Two measurement modes: fixed-point and scan, for flexible data acquisition
Precision motor-driven positioning with low noise
Automatic adjustment of incidence and observation angles for simplified testing
Stable light source with uniform vertical illuminance
Steady water spray system with collection trays and overflow control for wet testing
Quick-change sample fixture for efficient sample mounting
Core 32-bit multifunction mainboard for reliable control
Color touchscreen with menu-driven interface and metal keys
Automatic data output and report generation
Compatible with connected software for real-time data analysis
Enclosed dark test channel to minimize ambient light interference
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