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)

Applications:

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.

Product Information:

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.

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

Accessories

Main unit

Product certificate

User manual

Delivery note

Acceptance form

Product brochure

Test Procedures

Sample Preparation

Randomly cut four samples of 150 × 150 mm.

Pre-treat samples according to standard or customer requirements.

Parameter Setup

Configure general test parameters, file names, and number of test repetitions.

Testing

Install sensors on the sample table and secure connections.

Turn on the light source and select dry condition test to start measurement.

For wet testing, adjust spray nozzle and water flow to cover the sample, maintain stable spray for at least 2 minutes before measurement.

Data Recording

Acquire data in real-time via the software interface.

Generate reports comparing dry and wet retro-reflective performance.

Maintenance Information

Regularly clean light source, sensors, and spray nozzle to maintain accuracy

Inspect sample fixtures and motor-driven mechanisms for smooth operation

Calibrate system periodically in both dry and wet conditions

Verify touchscreen and software data acquisition function before each test

Store system in a dark, dust-free environment to prevent light or sensor degradation

Conclusion

The Absolute Method Retro-Reflective Coefficient Tester provides a highly accurate and reliable solution for evaluating the visibility performance of retro-reflective safety materials under both dry and simulated rain conditions. With precise angle control, stable light and spray systems, and automated data acquisition, it ensures compliance with key national and international standards. Suitable for traffic safety, occupational protective clothing, and quality control applications, the system supports objective performance assessment and consistent results. Overall, it is an essential tool for ensuring the safety, durability, and regulatory conformity of high-visibility materials.

FAQs

1. What is the purpose of the Absolute Method Retro-Reflective Coefficient Tester?

The Absolute Method Retro-Reflective Coefficient Tester is designed to accurately evaluate the retro-reflective performance of high-visibility safety materials, including occupational warning garments, school uniforms, reflective vests, and vehicle markings. By measuring the retro-reflection coefficient under both dry and simulated rain conditions, it provides objective, reproducible data. This ensures that reflective materials comply with national safety standards, enhancing visibility for workers, students, and road users, and reducing the risk of accidents in low-light or adverse weather conditions.

2. How does the system perform dry and wet measurements?

For dry testing, the sample is mounted on the sample table, illuminated by a stable standard light source (illuminant A), and measured using a high-resolution microphotometric acquisition system. Observation and incidence angles are automatically adjusted, and the detector records retro-reflective data. For wet testing, a water spray nozzle directs a controlled, uniform water flow onto the sample surface within an enclosed transparent spray chamber. The system maintains a steady spray for at least two minutes before measurement. Data is acquired in real time via the software interface, allowing comparison of dry and wet retro-reflective performance.

3. Which materials and applications are suitable for testing?

The tester is suitable for evaluating traffic safety materials, occupational high-visibility garments, reflective school uniforms, vehicle markings, license plates, and reflective vests. It is ideal for R&D, quality control, and compliance verification in textiles, transportation, construction, and industrial safety industries. By measuring both dry and wet retro-reflection coefficients, manufacturers can ensure consistent visibility performance under varied conditions, and meet standards such as GB 20653-2020. GB/T 28468-2012. ASTM E808. and DIN 67520. ensuring personnel safety and regulatory compliance.

4. What are the main features of this tester?

The system features a high-resolution microphotometric acquisition system, infrared distance measurement for precise positioning, wireless control and data transfer, and two measurement modes (fixed-point and scan). Motor-driven precision positioning ensures low-noise operation. The system includes automatic adjustment of incidence and observation angles, a stable light source, a steady water spray system for wet tests, and a quick-change sample fixture. A 32-bit multifunction mainboard controls operations, while the color touchscreen provides menu-driven interface. Real-time data analysis and automatic report generation are supported, and an enclosed dark channel minimizes ambient light interference.