Light Transmittance Tester

A Light Transmittance Tester is an instrument used to measure the optical properties of transparent and translucent materials with parallel surfaces, as well as plastic films. When a parallel beam of light strikes a medium (such as transparent plastic), the beam changes direction (scattering and deflection) due to irregularities in the material’s optical properties, surface defects, internal structural irregularities, and the presence of air bubbles and impurities. The resulting disordered light is referred to as scattered light. Internationally, the ratio of the scattered light flux—which passes through the sample and deviates from the direction of the incident light—to the transmitted light flux is expressed as a percentage; this is known as haze. Samples with high haze appear more blurry to the human eye.

Light Transmittance Tester play a vital role across various industries and are one of the key tools for ensuring product quality and the stability of production processes. They are used to measure the light transmittance and haze of colorless, transparent materials.

1. Plastics Industry: Used to evaluate the quality of plastic films and sheets—such as polyethylene (PE) and polypropylene (PP)—by measuring their haze to ensure their transparency and optical properties meet production requirements. It is also used to assess the visual appearance of plastic packaging materials, such as food and pharmaceutical packaging.

2. Glass Manufacturing: Measures the haze of architectural and automotive glass to evaluate visual clarity and optical uniformity. This helps optimize glass production processes and improve product quality.

3. Paints and Coatings: Determines the haze of coatings formed on different substrates to evaluate their gloss and appearance. Used to compare the optical properties of different formulations during the development of new coatings.

4. Display Industry: Measures the haze of liquid crystal displays (LCDs), organic light-emitting diodes (OLEDs), and similar devices to ensure optimal display performance and visual experience.

5. Optical Materials: Evaluate the haze of optical components such as lenses and prisms to accurately analyze their optical performance.

6. Lighting Industry: Measure the haze of lampshades, diffuser panels, and other components to achieve optimal light distribution and softness.

7. Medical Industry: Test the haze of transparent materials used in medical devices, such as IV tubing and protective face shields. Also used for transparency testing of pharmaceuticals.

8. Chemical Industry: Used to determine the transparency of liquid solutions to help control production processes.

9. Food Industry: Used to inspect the quality of products such as fruit juices and beverages.

10. Environmental Protection: Used to monitor water quality, among other applications.

• Effective, Accurate, and Rapid Measurement: Based on standardized operating procedures and precisely controlled test conditions, testing is fast and effective, ensuring the consistency and accuracy of results. The system uses a human-eye-response detector, whose spectral response curve almost perfectly matches the visual function Y/V(λ), enabling it to simulate and quantify the human eye’s perception.

• Simple operation and high automation: An LED light source simulates the CIE standard light source, offering a longer service life and immediate use without the need for warm-up.

• Excellent safety performance: Equipped with a 12V safety voltage adapter, the entire unit operates at low power, generates minimal heat, and is safe and reliable to use.

• Convenient measurement with broad sample compatibility: The open measurement area supports both vertical and horizontal testing orientations, easily accommodating a wide variety of sample shapes. The standard 0/d optical configuration ensures more accurate test data and minimizes interference from surface reflections. It complies with the three major haze standards—GB/T 2410, ASTM D 1003/1004, and ISO 13468/14782—offering strong compatibility.

• Extended Lifespan and Accurate Measurement: The LED light source has a lifespan of up to 5 years or 5 million measurements, ensuring long-lasting durability. With a resolution as high as 0.01 and repeatability accuracy of 0.05, it ensures accurate and reliable measurement data.

• Massive Storage and Convenient Operation: The device can store up to 20,000 sets of test data, meeting the demands of high-volume testing. Equipped with a capacitive touchscreen for smooth and responsive operation, and a 7-inch IPS wide-view display for clear and crisp visuals. An external measurement start button makes operation even simpler and more intuitive.

• Smart Connectivity and System Upgrades: Supports Wi-Fi connectivity, enabling automatic calibration of the instrument’s timing, as well as remote system upgrades to easily optimize device performance.

• Permission Levels and Data Security: Supports multi-level user permission management, allowing the creation of multiple users and the assignment of different operational permissions to each, facilitating experimental traceability and data security control.

• Data Display and Export: The data display interface allows for the simultaneous comparison of multiple samples, making differences between samples immediately apparent. Equipped with a USB port, it supports comprehensive data export for convenient subsequent analysis and management.