Tinted glass must meet GOST requirements. To establish this fact, the inspector must use a special (please note, certified) instrument. Today such instruments may be several: “Blick”, “Tonic”, “Raster” most common. Externally, they look like a trauma gun. In addition to certification, instruments must be validated and have a compliance mark.
Instruments, it should be noted, are quite accurate, but provided that they are properly used. If the inspector tries to measure the transparency of the glass on a day when 10°C is colder outside, the readings of the device can almost certainly be appealed, because it in this case gives a noticeable error.
You can’t check tinting and in fog, smog or heavy rain. But day or night on the yard device is not important, the percentage of light transparency can be measured and in total darkness. To do this, the device must be folded “muzzle” against the glass and press the start button.
“Blick” and “Raster” send a directional beam that reflects, shows a percentage of light transparency. The higher the percentage shown on the monitor, the better the driver, because it means that the glass absorbs a minimum of light, which means that the safety of the movement does not threaten anything. The device is not portable, it depends on the energy source, and it needs a well-charged battery for accuracy.
It is often the case that inspectors stop a deafly sunken machine, but the devices for measuring the degree of transparency of the glass do not have. In this case, they may invite the driver to proceed to the technical inspection station for examination. To agree or not is the driver’s right. After all, to withdraw the car or to transport it against the will of the owner or owner the inspector has no right (unless, of course, the driver has not committed on auto crime).