Most frequently chosen

see all models of our paint thickness gauges,
divided by type.


Car trade in our country, especially recently, has become very popular, and automotive ads can be found at almost every step. Most of us cannot imagine functioning in everyday life without a car. It can not be hidden that the purchase of a new car from the salon for many of us, due to the high cost, is unreachable, which is why automotive secondary trade is growing more rapidly. However, it should be noted that when buying a car "second-hand" you can never be sure about the actual condition of the vehicle and the integrity of the people who sell the vehicle. Remember to get as much reliable information about it and its history as possible before buying a used car. This will help you to avoid disappointment, unnecessary nerves and additional costs later.

Everyone knows perfectly well that the price should depend on the technical condition of the car, but sellers often deliberately hide unfavorable information about the vehicle (for example, accidents) so that its price does not have to be reduced. Here we meet the varnish meter / tester, whose manufacturer is, among others, Prodig-Tech. Prodig-Tech is one of the largest Polish manufacturers of varnish thickness gauges, which are characterized by precision in making measurements. Many manufacturers or business partners use similar technologies, but a good gauge of GL varnish thickness will be known by its quality and accuracy when measuring it.

Series of varnish thickness gauges Prodig-Tech

GL varnish thickness gauge series available

Thinking about different types of customers, the following series are available, which are characterized by the use of similar technologies, guaranteeing the highest product quality and measurement accuracy:


The GL-PRO series meters are solutions based on modern 32-bit processors. As a result, fast and accurate measurement was obtained using a 12-bit converter. The meters use an innovative design of the measuring probe, which enables spot measurements on ferromagnetic and non-magnetic materials (depending on the version), automatically recognizing the tested material and informing on the display about the type of material. The probe is completed with so-called ball. The distinguishing feature of the FAZ series meters is the automatic recognition whether the steel sheet is covered with a zinc layer or whether it is galvanized. The most popular meter / sensor of varnish thickness in this series is the Varnish Meter GL-PRO-2-F, GL-PRO-6-Fis equally popular.


The premium series is intended for more demanding users, it is characterized by a number of additional functions and technical solutions that improve the comfort of measurement and its accuracy. The available gauges have a measuring head suspended elastically, which is constructed in such a way that when pressing the probe against the test surface, it "slides" into the probe housing. Thanks to this, the measurement becomes more accurate due to a more even pressure to the tested surface. Hand shake is also leveled. The GL 8s and GL 8 paint thickness meter is the most popular in this series.

Super Plus

Basic varnish meters in modern housings and with the MEASUREMENT ASSISTANT® function. The MEASUREMENT ASSISTANT®function with a LED tells the car assessor whether he has had bodywork and paint repairs. When the function is enabled, the meter / tester indicates this by means of an LED diode on the state of the metal plate:
- diode is off - correct varnish,
- diode pulsates - second coat of varnish,
- the diode is constantly lit - putty or more layers of varnish.
It should be noted that the MEASUREMENT ASSISTANT® function is only to help in the interpretation of measurements, it cannot be the basis for an unambiguous answer to the question whether the car has had bodywork and paint repairs. A perfect example is the GL-6 + or GL 6s varnish meter.


Lacquer thickness gauges GL series standard are the basic devices having the most important functions necessary for measuring the paint coating on cars. They are equipped with an LCD display (except GL-mini, which has a 7-segment LED display), on which the measurement result and function selection menu are presented. All GL varnish gauges have a built-in calibration (zeroing) function. An example is the GL-3s-UV, GL-6s or GL-3s-UV varnish meter / tester.


The SMART GL varnish thickness gauges allow connection to a telephone via bluetooth. Thanks to the GL-SMART application, we receive a number of additional functions that are not available for standard paint thickness gauges. The GL-SMART application developed for Android allows connection to the meter. Depending on the model of the meter, we get a number of new functions that are not available for standard meters. Three models are available, but the most popular meter / tester in this series is the GL-SMART-8 and GL-SMART-XL varnish meter..


Magnetic varnish thickness gauges, in which a double measuring scale was used - one on the retractable element and the other on the meter housing with a movable yellow pointer placed in the gap. Two scales are in colors with a tone depending on the thickness of the measured varnish layer. In addition, the measurement assistant was used in the form of marked measuring intervals on the scale, which inform about the original, double or putty varnish - these are, of course, only suggestive hints, but facilitate the measurement of this type of device. In this series we recommend the GL-MAG paint meter..

Which varnish thickness gauge should I choose?

When choosing a varnish thickness gauge, the main task will be to answer the question, what are our needs and for what purpose does the device serve us. Is it about checking a few cars, or maybe we care about intensive, professional use of the meter for a long time. If our priority is to buy an old used car, then the GL-2 + model, which guarantees high quality and low price, will be perfect. If we are looking for a newer car and we want additional functions of the device, such as: detection of galvanized sheet metal, efficient measurements also on aluminum, measurement memory, choosing a meter from a professional line will be a much better solution, for example GL-PRO-2 or GL-PRO- 6. Their measuring range is very wide, as it ranges from 0 to as much as 2000 µm. Manufacturers use similar technologies, but this does not necessarily match the same quality of products. Prodig-Tech meters guarantee accurate and precise measurement in all conditions.

Varnish thickness gauge with built-in probe and meter on the cable - differences

Meters that have a built-in probe are more convenient during transport and make measurements faster. Their disadvantage, however, is that by opting for this type of gauges, it will be much harder for us to measure hard-to-reach car components. Much more room for maneuver is provided by meters with a probe on the cable, in which the probe is not permanently mounted in the meter housing, but is connected with a cable. Thanks to this, we are able to reach even the most difficult places available. In the case of meters with a probe on the cable, in order to make a measurement, one should hold the meter in one hand and the probe in the other. This arrangement allows us to hold the device steadily and reduces vibration, and thus, the measurement of the element is more accurate.

What is a varnish thickness gauge and what it is used for

The GL varnish meter / tester is a small and handy device that is used in the automotive industry, and is most often used when buying a used vehicle to check its actual condition. This device allows us to verify the available ads, and above all to know the past of the car that interests us. Most importantly, if you want to take a measurement, you don't have to ask anyone for permission. In fact, the person selling the car should not mind - if it is against the measurement, it is a sign that something is wrong. The sensor easily and quickly allows you to measure the paint layer anywhere in the car. If there is a leveling compound underneath or if the checked element has been painted again, the meter will show a deviation from the default values. Due to the location of the probe, we distinguish two types of meters. The probe in the meter can be built-in or on a cable. Probes on the cable allow us to perform the test even in the most difficult place available.

Remember! Finalizing the transaction means accepting the condition of the vehicle, so it is important to carefully read the technical condition of the car before buying. Devices available on the market will help us, i.e. paint sensors or paint meters. In fact, a good paint meter / tester can save you a lot of money.

How to use the varnish thickness gauge

The device should be calibrated first. The good news is that calibration is free, and what's more, you can do it yourself without leaving your home, because each meter comes with a calibration or zeroing plate. The plate, in addition to performing calibration, can also be used to check the correct operation of the meter.

It should be remembered that the measurement is best done on a washed and dry surface - then we will avoid erroneous measurements, so before starting it is best to wash or wipe the places where we will measure.

The meters we offer are very easy to use and require only switching on the device and placing the probe in selected places. To make the measurement as reliable as possible, it is best if we take it in as many places as possible (preferably at intervals of about 10-15 cm), and we pay the most attention to the elements that are most exposed during a collision and which are difficult to replace, i.e. rear fenders or sills. Different manufacturers apply varnish layers of different thickness, which is why many people recommend a symmetrical comparison, for example left to right in the same place. The paint thickness should be similar in both places. If the difference between the measurements is large, it may mean that the vehicle was involved in a collision. On the other hand, in the case of a door or mask, it is best to measure from both the outside and the inside.The thickness of the varnish coating will vary on different elements, however this difference should not exceed 10µm.

What are the correct factory values ​​for car paint thickness? The thickness of the varnish coating is given in micrometers (one millionth of a meter - the symbol μm).

60 µm-200 µm - the most desirable result means that the varnish is factory made,

200 µm-300 µm - this result means that the varnish was re-painted,

above 300 µm - at this moment we should see a red light, because the result suggests bodywork repair and filling the car.

Please note that the thickness of the factory paint layer is not the same for all cars. The biggest difference can be seen between cars produced in Europe and Asia. Brands produced in Europe have a thicker layer of varnish. Here the counter will show between 120 and 150 μm. In turn, the paint layer on cars made in Asia is thinner, and its value oscillates at the border of about 80 μm - 100 μm.

Do you agree to be lied to?

By buying a car from a dishonest seller, you run the risk of additional costs that may even be close to the value of the car you purchased. Remember that buying a vehicle without checking it thoroughly means acceptance of its technical condition. Everyone likes to know what they are buying. Do not let the sellers fool you and buy the right meter / tester or varnish sensor, and nothing will surprise you.
You can also buy our meters stationary. Available distribution points can be found at, in the "Distributors" tab.

How and where to buy the varnish thickness gauge?

By entering your email address, sign up to our website. Go through the registration process, which is simple and intuitive. Now go to the "search" section and choose the meter that will suit you. If you do not know what to choose, the main page of the website also has a list that contains the most popular and most frequently bought models. Finally, add the product to the cart and proceed to pay for the purchase. By purchasing the meter in our service, you will receive a guarantee of quality and accuracy of operation. Check and see for yourself!