Spotlight on New Coating Thickness Gages: QNIX 4200 and QNIX 4500

With many new products available in our catalog, we would like to take a moment and showcase some of the implications oftwo of our coating thickness gauges: the QNix 4200 (Paint Meter W/ Integrated Fe 120 Mil Ext. Cable Probe) and the QNix 4500 (W. Fe & NFe 120/120 Mil Integrated Cable Probe). With these options available, you can determine which of these devices will best suit your needs. For your consideration, here is spotlight on each coating thickness gauge and their special characteristics.


QNIX 4200

Our QNix 4200 Coating Thickness Gage - Paint Meter W/ Integrated Fe 120 Mil Ext. Cable Probe is one of the best devices for measuring the thickness of cars. The measurements of this coating thickness gauge creates incredibly specific measurements of laquer and corrosion protection thickness. It does not need any calibration, so that will save you a lot of time while measuring. All that the QNix 4200 requires is a push of a button. It also comes with a super sensitive measuring probe. The probe does not require any cables or plugs, therefore increasing the convenience you will experience with this device. It also comes with a LCD display for your readings, serial number, operating mode, and battery status.


QNIX 4500

The QNix 4500 Coating Thickness Gage W. Fe & NFe 120/120 Mil Integrated Cable Probe is an extremely powerful device. It holds many similarities to the 4200, but also distinguishes itself from that gauge by being specially made for powder coating. Not only does it work for steel, but also non-metallic substrates. This device comes complete without the need of calibration. It also comes with a handy sensitive measuring probe. You just can’t go wrong with that one. Like the probe for the 4200, this one is lightweight and does not need plugs or cables.


Further Possibilities

So which coating thickness gauge will you need? Although these devices are pretty handy for the automobile and powder coating industries, there are many more options available for coating thickness gauges. Not only that, but there are many other accessory devices meant for keeping your coating thickness measuring efficient. For more options, please feel free to check out the rest of our catalog. For any questions feel free to see our FAQ page, or contact Test Coat Inc. for more information.

2 New Paint Meters Showcase

The need for good quality and varying coating thickness gages won’t be going away for a while. Since we all require different measurement needs for our paint meters, it is about time that you got a nice, quick presentation on some of our new products. These descriptions are meant to give you a fast summary of our 2 recent paint meters, in order to give you an easier way of picking which appeals most to your requirements.



This meter features incredibly high measuring accuracy. It is well respected for being able to permit super precise measurements of lacquer and corrosion protection thickness. Primarily designed for measuring in the powder-coating world, this little guy can bring a whole new level of efficiency to your paint measuring capabilities. Whether it is making measurements on iron or steel, the Paint Thickness Meter / Gauge -QNix® 4200 is definitely not one to ignore.



This thickness gauge meter is a wonderful addition to the automobile industry. It allows for extremely well precise measurements on steel and iron surfaces as well. Not only that, but it also contains a dual probe for measurements on steel as well as non-ferrous metals. It contains a lightweight measuring probe that is built into the gage. You can even use a simple button in order to change the measuring procedures. It also comes with Proven Hall sensor and Eddy Current technology. What is so special about that? Well, that means this device comes with an integrated measuring probe that does not include cables or plugs. That is right, freedom literally at your fingertips.


 Although these items are quite special in their own right, there are far more interesting paint meter possibilities available. If you continue to look through our catalog, you will find a whole new realm of possibilities for your paint meter devices. The only hard part will be deciding which one you want more. For more information on our products and services, be sure to contact us here.

How to Measure Paint Thickness on Steel

On steel, paint thickness is gauged by using a coating thickness meter. There are many brand names of coating thickness meters on sale in the market today. The accuracy and ease of use of the latest and greatest meters make them an indispensable gadget for quality checking. The ergonomical shape and combined sensors make it easy for the meter to make a quick and exact reading of the coating thickness of paint. Paint thickness gauges have the capability to measure paint thickness on steel or coatings that are non-magnetic like lacquer, coppere, plastic, zinc, chrome and enamel on iron and steel.

Paint Thickness Gauges have the following capabilities:


  • Quick measurement without calibration
  • Measurement range is 0-5.0 mm wide
  • Very accurate and exact in measure
  • Vibrations free measurements
  • Wear resistant
  • Curved surfaces easy measurement like axles through “V” slot feature
  • Unidentified prime material optic alarm
  • Comfortable to hold
  • Selection of measurement units
  • Automatic/manual power on or shut off
  • Pack with batery, case standard calibration manual


The measuring process is simple. Position the gadget on the area you plan to measure and the meter reading will give the exact thickness. To make sure the reading is done correctly, a calibration gadget is included, which will essentially boost reliability of the results. The correct measurement of paint thickness is important for locating any weaknesses in materials. A car that is repainted to hide any evidence of damage cannot hide from the accuracy of the meter to calibrate thickness. The meter can distinguish between a uniformly painted body and a spotty paint job.

What is A Cross-Cut Test?

A cross hatch cutter is utilized to test the stickiness of dry paint coats through a series of slashes through the surface coating. A series of slashes are done in parallel and cross angled to one another to draw a 25/100 even square pattern.

The drawn area will undergo scrutiny by the use of a chart table after treatment with a hard brush or tape adhesive on a hard surface. The cross hatch cutter is a self-positioning bracket knife that ensures correct and even pressure and does not require the use of other tools.

 When using the cross-cut knife, follow these preparations:


1.    Ensure that the surface is firm and rigid where you will perform the cutting.

2.    Select the right blade for the cutter.

3.    Ensure the blades are always sharp and have no damage. ISO regulations require cutters to be replaced if the teeth of the cutter level 0.1 mm.


The purpose of measuring a lattice pattern in right-angles is to penetrate through the substrate by cutting. The coating resistance to the substrate separation must follow regulations. Refer to schedule manual attached with the product for accuracy.

Depending on the substrate and thickness of the coating, make two slashes/cuts drawing the shaft with the corresponding cutter through the substrate thus forming it into a lattice pattern.Then peel off the flakes of paint. For thick substrates, apply adhesive tapes to a group of cuts parallel on top of the lattice pattern and slowly pull it out in 0.5-1 sec. at a sixty degree angle within five minutes after applying.

Though the cross-hatch cutter is durable in its shape and size, it requires proper maintenance to last longer. Here are some tips to maintain the equipment.


  • Clean the equipment after every use.
  • Use a dry, soft cloth to clean the equipment. Never use any hard materials to clean the instrument such as abrasive paper or wire brush because it will damage the instrument permanently.
  • Never use a compressor to clean the cutter.
  • Keep it intact in its case when you’re not using the instrument.

How Metal Hardness Testers Improve Quality

Hardness is defined as the material resistance to penetration of surfaces. Three primary types of testing metal hardness are as follows:


  1. The scratch test is the easiest way of testing metal hardness. In this type of testing, several materials are graded on their capacity to scratch with each other. This kind of test is utilized mostly in mineralogy.
  2. In a metal hardness dynamic test, an object with set dimensions and mass is dropped on a surface and let to bounce back. Height of the rebound is the indication of its hardness.


The Briner Metal Hardness Test

This test is done through the application of a constant mass, normally between 500 to 3000 kg for a duration of 10-30 seconds using a 5 to 10 mm diameter of hard metal on a workpiece flat area. Hardness is identified by finding the mean of the diameter of indentation and calculating the result by dividing the application load by surface location of indentation.

The Vickers Metal  Hardness Tester

In this metal hardness test, a pyramid diamond with a square base is used as indenter in testing metal hardness. The Vickers Test operates the same as the Brinell’s principle, meaning the numbers are expressed on the impression’s terms of area and load.

The Rockwell Metal Hardness Tester

This test utilizes a reading mechanism directly based on the differential measurement depth principle. Initially, a lighter load is applied and then established as a zero position datum. Applied next is a heavy load for a specific time duration and then taken out leaving the lighter load behind.

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