How do I Check My Window Tint VLT?

Time:2020/05/25 12:00:00 Browse:540

Tint tester is a light transmittance measuring device used to detect the visible light transmittance, which can be used to detect the percentage of visible light transmitted through car windows. This is a compact and split-type device that is suitable for use in any occasion. For example, it can test the automotive windshield transmittance on the road. How to check window tint VLT?

There are more and more types of automobile window films. In addition to the windows that can be insulated from most ultraviolet rays and heat, some more professional car films can even play a role of anti-peeping and explosion-proof. However, the light transmittance of the window is closely related to the driver's viewing distance. Considering the safety issues of the driver and the passenger, different countries and regions have requirements for the light transmittance of the car front windshield. The instrument is also widely used in vehicle management stations and traffic police brigades and other units.

I. Why do we use tint tester to measure the car window VLT?

1. VLT value of window tint affect the driver's viewing distance

The automotive window film not only has decorative function, it can also block most ultraviolet rays and heat. It can also reduce the temperature in the car in high temperature weather. There are some more professional anti-peep films to prevent the outside from seeing the car through the window valuables. Although automotive window film has many advantages, if the light transmittance does not reach the standard, it will seriously affect the driver's viewing distance, which will seriously threaten the life safety of the passenger. 

2. Need legal guidance on window tinting laws

In China, there is a national standard for automotive window film. According to the current film standard mentioned in the "Technical Conditions for the Safety of Motor Vehicle Operation": the visible light transmittance of the front windshield window film and the glass outside the windshield used for the driver ’s visual area should be greater than or equal 70%; while in the UK, the law requires that the visible light transmittance of the automotive window film must be greater than 75%. And the visible light transmittance of the automotive window film at the driver ’s location must be greater than 70%. The specific percentage requirements depend on the country and region. The visible light transmittance measured by the tint tester (window tint meter) can provide data intuitively, so the tint meter is also a necessary light  transmittance measuring device to detect whether the VLT of the automotive window film is in compliance.

II. How do I check the VLT of automotive window tint using a tint tester?

  1. Step 1: Use professional tint tester to test the VLT of automotive window film, or directly measure the visible light transmittance of the front and rear glass of the car.

  2. Step 2: Make sure that both the main unit and auxiliary unit of the split-type window tint meter are turned on. After the main unit displays 100% visible light transmittance, attach the main unit and auxiliary unit to the sides of the glass. Align the red laser point in the main unit and auxiliary unit.

  3. Step 3: Press the "HOLD" button on the tint tester, the measured VLT value will remain on the tint tester after taking away the sample.

  4. Step 4: Determine whether the VLT of your automotive window tint meets the standard according to the local standard.

Note: When the LS110 tint tester is turned on, it is necessary to ensure that the main and auxiliary machines are stuck together. And the red laser point is aligned with the center of the cross, so as to ensure the accuracy of subsequent test data.

III. Split window tint meter

1. LS110 tint tester for vehicle administration

Light source: 380-760nm, in line with CIE photopic luminosity function
Adopt wireless split design, built-in strong suction magnet
It can measure front and rear glass, side glass, etc.
Suitable for vehicle transmittance inspection of vehicle management stations, traffic police brigades, etc.

2. LS110 tint tester working principle

  • The LS110 tint tester adopts wireless split design. And the main unit and auxiliary unit have built-in light source and receiver respectively.

  • The main unit and auxiliary unit have built-in strong suction magnets, which can be adsorbed on both sides of the glass. This tint tester can be used for light transmittance measurement in various occasions.

  • Three light sources of 380-760nm, which meets the CIE photopic luminosity function.

  • How does a tint meter work: when no test material is placed, the light intensity received by the receiver is the original light intensity; after placing the measured material between the main unit and the auxiliary unit, only part of the light intensity will pass through the material.

  • How to calculate the VLT of window tint: the light intensity through the measured material divided by the original light intensity.

  • The LS110 tint tester measures the visible light transmittance at three positions simultaneously. And the visible light transmittance finally displayed is the average of the three data.