Transmission Meter

How to select a suitable Window Tint Meter?

I. Select tint tester according to tested material

1. Window film measurement: LS160, LS160A, LS161, LS161A, and LS161H window tint meters

2. Side windshield measurement : LS162, LS162A, LS163, LS163A window tint meters

3. Front windshield: LS110A and LS110H window tint meters

4. Desktop window tint meter: LS101

II. Selecte window tint meter according to testing wavelength

1. 940nm window tint meter is recommended to measure absorbing window film (glass).

2. 1400nm window tint meter is recommended to measure metallic film or ceramic window film (glass).

3. LS161H portable window tint meter can be used to test absorbing film, metallic film and ceramic window film, for more comprehensive insulation performance evaluation.

What is a Window Tint Meter?

A window tint transmission meter is a device used to measure the light transmission rate of glass, window films, and other flim materials. It helps determine how much visible light, ultraviolet (UV), or infrared (IR) radiation passes through a surface, making it an essential tool for industries such as automotive, construction, and energy efficiency.

Key Parameters Measured by a Window Tint Tester

1. Visible Light Transmission (VLT): Measures the amount of visible light passing through.

   Applications:

• Automotive Window Tinting Compliance: Ensures that car window tint meet legal visibility requirements, improving safety.

• Architectural Glass Selection: Helps in balancing natural light, reducing glare, and improving indoor lighting conditions.

• Eyewear and Display Panels: Determines the clarity and brightness of sunglasses, safety glasses, and digital screens.

    2. UV Transmission: Determines how much harmful ultraviolet radiation is blocked.

        Applications:

• Skin and Interior Protection: High UV rejection films (e.g., 99% UV rejection) prevent skin damage and premature aging while protecting car interiors from fading and cracking.

• Home and Office Window Films: Reduces UV-induced fading of furniture, carpets, and artwork, extending their lifespan.

• Medical & Laboratory Use: UV-blocking glass is essential in hospitals, laboratories, and clean rooms to prevent exposure to harmful UV radiation.

     3. Infrared Transmission: Assesses heat-blocking properties, useful for energy-efficient windows and automotive tint films.

     Applications:

• Energy-Saving Automotive Films: High IR rejection window films (e.g., 90% IR rejection) reduce heat buildup inside vehicles, enhancing driving comfort and lowering air conditioning costs.

• Architectural Solar Control Films: Buildings in hot climates use low-emissivity (Low-E) glass or IR-blocking films to reduce cooling expenses and improve indoor comfort.

• Greenhouses & Thermal Insulation: Greenhouses use IR-selective coatings to regulate temperature, ensuring optimal plant growth without excessive heat buildup.

Application Case: Ensuring Legal Compliance for a Car Window Tint Supplier

A car window film supplier in California has integrated Linshang LS101 window tint transmission meter into their quality control process to ensure compliance with state tinting laws (e.g. Front side windows must have a Visible Light Transmission (VLT%) of at least 70%. ) By testing the VLT% of each batch before distribution, they guaranteed that their films met legal standards, reducing product returns and preventing non-compliance issues for their customers. This enhanced trust with auto shops and dealerships, improved brand reputation, and ensured smooth sales by providing accurately labeled, law-compliant window films. The window tint meter became an essential tool for maintaining quality control, legal compliance, and customer satisfaction.

FAQs About Window Tint Meter 

1. Which test result is more accurate between window tint meters with 940nm and 1400nm light source?

• No matter which window tint meter is used, the test data is objective and accurate.The wavelengths of 940nm and 1400nm are relatively representative wavelengths of sun spectrum. 

• Most of the absorbing films (heat-absorbing films) have better infrared blocking effect at 940nm, while the magnetron sputtering reflection film has better blocking effect at 1400nm such as metallic film and ceramic nano window film. 

• Please choose the right window tint meter based on your own window film category.

2. The differences between a metalic film and a heat-absorbing film?

• The metalic film is produced by a magnetron sputtering process. A large amount of metal elements are added for a good reflection ability to the infrared film. It is insulated by the principle of reflecting infrared rays.

• The heat-absorbing film is added with an infrared absorber during production and the infrared is absorbed by the film. It is insulated by the absorption principle and secondary heat radiation will be generated after the heat absorption is saturated.

3.  In what fields are desktop and split window film transmission testers used respectively?

• Desktop window film transmission testers are primarily used in laboratories, manufacturing facilities, and quality control departments, where precision and stability are essential. These testers are widely applied in window film production, automotive glass manufacturing, and architectural glass testing, ensuring that materials meet industry standards for UV rejection, infrared rejection, and visible light transmission.

• Split window film transmission testers are designed for on-site inspections and mobile testing, making them ideal for law enforcement, automotive tint shops, and field applications. These devices are popular among car dealerships, window film installers, and building inspectors, allowing professionals to test the UV and infrared rejection properties of installed films. Their compact and portable design makes them convenient for quick, real-time measurements in various locations.

4.  How to check car front windshield tint?

• It is recommended to use Linshang LS101A or LS101H split window tint transmission meter. When testing, just attach the main unit and auxiliary unit to the inside and outside of the front windshield respectively, align the position with the laser, and then read the value. The lower the VLT percentage, the darker the tint.