How to Measure Window Tint Tinted vehicle glass has both practical and aesthetic purposes,but it can also create safety issues. Reducing glare and protecting people with light-sensitive illnesses are permitted uses of tinting,but law officers still need to be able to see through the glass to know who is in a vehicle and what they are doing. States sets limits on the amount of tinting permitted,and tint meters are used to check for compliance. A digital meter is used to measure the degree of tint. Things You'll Need: Soft cleaning cloth,Tint meter Instructions 1. Roll the window down halfway if the door frame totally surrounds it,to create sufficient space for the meter to be held above the top edge of the glass. Windows in open-topped frames can be left fully closed. 2. Inspect the window for dirt,dust and scratches. Locate a spot on the top edge of the window where the glass is free from scratch marks. If the glass is dirty,clean it carefully with a soft cloth. Avoid taking readings on scratched glass; scratches may influence the readings autel mx-sensor 315MHz. 3. Hold the tint meter above the window and align the slot in the meter base with the edge of the glass. Gently lower the meter onto the window so the glass slides into the slot in the base of the meter. Press the meter fully down to activate the switch hidden inside the slot. 4. Observe the reading displayed on the liquid crystal display screen of the meter. This shows the amount of visible light penetrating the glass. Record the reading. For example,a reading of 45 indicates that 45 percent of the visible light penetrated the glass. 5. Remove the tint meter by lifting it off the glass. The meter will switch off as soon as the glass no longer presses on the internal switch. Tips & Warnings If a reading seems wrong,try testing a different part of the glass. Dirt,grease and fine scratches may affect the light beam and give false readings. Test each window in two spots to check that the tint is uniform TPMS. Permitted tint levels vary from state to state. A tinting level that is lawful in one state may be unlawful elsewhere. For example,in Tennessee tinting a windshield is permitted if at least 70 percent of visible light still passes through it,but in neighboring North Carolina all windshields tinting,other than a visor strip along the top edge,is prohibited.
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