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of, for example, plastics, paints and other coatings on ferrous and non-ferrous metals. With a measuring range of up to 5000 µm on ferrous metals, the material tester covers a wide range of measuring tasks.
of, for example, plastics, paints and other coatings on ferrous and non-ferrous metals. With a measuring range of up to 5000 µm on ferrous metals, the material tester covers a wide range of measuring tasks.
of, for example, plastics, paints and other coatings on ferrous and non-ferrous metals. With a measuring range of up to 5000 µm on ferrous metals, the material thickness meter covers a wide range of measuring tasks.
of, for example, plastics, paints and other coatings on ferrous and non-ferrous metals. With a measuring range of up to 5000 µm on ferrous metals, the material thickness meter covers a wide range of measuring tasks.
of, for example, plastics, paints and other coatings on ferrous and non-ferrous metals. With a measuring range of up to 5000 µm on ferrous metals, the paint gauge covers a wide range of measuring tasks.
of, for example, plastics, paints and other coatings on ferrous and non-ferrous metals. With a measuring range of up to 5000 µm on ferrous metals, the paint gauge covers a wide range of measuring tasks.
PCE-CT 5000H is a coating thickness measuring instrument used for the rapid determination of coating thicknesses on ferrous (Type F) and non-ferrous (Type N) metals. The coating thickness gauge automatically detects the type of metal to be measured.
Coating thickness measurement is the determination of the layer depth of a coating or film on a particular substrate. Coating thickness can be measured when the film is wet or dry. However, non-destructive coating thickness measurement must be performed when the film or coating is dry.
The substrate is typically a ferrous metal (e.g., steel or iron) or a non-ferrous metal (e.g., aluminum or copper). In some cases, coating thickness must be measured on non-metal substrates such as wood, glass or plastic. In these instances, an ultrasonic coating thickness gauge is recommended, as a traditional dry film coating thickness gauge uses a magnetic or eddy current measuring technique.
Most eddy current or magnetic coating thickness gauge products are dual purpose, meaning the gauges are suitable for measuring coating thickness on both ferrous metals and non-ferrous metals. These versatile coating thickness meter devices usually offer a wide measuring range.
Coating thickness measurement is performed frequently in the automotive industry. 
During automobile manufacturing and production, a coating thickness gauge is used to determine whether enough paint or gloss has been applied to various parts and surfaces. Car dealerships, auto body repair shops and car insurance claims investigators also use coating thickness meter devices to identify variations in vehicle paint jobs signaling prior accidents.
In addition, a coating thickness measuring instrument can be used to inspect the application and wear of corrosion-resistant protective coatings on metals (e.g., hot-dipped galvanized zinc on steel beams). Thus, a handheld coating or layer thickness meter is a valuable tool used by building, bridge, oil tanker, gas pipeline and petrochemical plant inspectors for corrosion monitoring.
If you have questions regarding a specific application, the friendly and knowledgeable technical support staff at PCE Instruments will assist you in finding the right coating thickness gauge for the task at hand. Simply contact at or +44 ( 0 ) 161 464902 0.
The sensor of a coating thickness measuring device either can be found inside the unit or within a separate probe. A coating thickness gauge with a built-in or internal sensor is ideal for quick, on-the-spot measurements in the field or on the production floor. This style of coating thickness gauge often comes pocket-sized or designed to be conveniently portable. A coating thickness gauge with an external sensor probe is better for taking measurements in small spaces with limited access.
Some coating thickness gauge devices come with memory for saving measurement data. When the memory is internal or built into device, the saved measurement data usually can be transferred to a computer via a USB port or RS-232 interface. In addition to a connection cable, software may be required for data transfer. Please review the specifications of each coating thickness meter carefully before buying to ensure all necessary components are purchased.
This is another important point to keep in mind. Find out how long the supplier has been in business. The longer the company's tenure, the more likely it is that you will be able to order spare parts a few years down the road after buying your coating thickness gauge. PCE Instruments has been in business since 1999. (For more details, please visit the About Us / Corporate History section of our website.) Also find out what kind of technical support will be available to you. Call PCE Instruments, talk to the technical support team prior to purchasing and see for yourself the level of service provided.
Often more is involved in the budget than just the cost of the coating thickness meter. Calibration costs are common expenses that can occur when using a coating thickness measuring device. For instance, if you need to meet the requirements of an ISO quality standard, a regular calibration interval needs to be adhered to. ISO calibration costs can occur at the time of purchase and reoccur on an annual or even semi-annual basis, depending on your accuracy needs and usage of the coating thickness gauge.
It is also possible that recalibration becomes necessary later on, due to the drift sensors can experience over time. Consumables like (rechargeable) batteries should be included in your calculations as well.
The majority of products and devices used in everyday life all possess a type of coating 
on the surface, for a number of reasons: it may be an optical improvement of the looks, it may be an improvement of the smoothness (or vice versa) or other qualities, or a protective function. Coatings are not the same and they differ not only in the type of material / paint / varnish, but also in the thickness which can be measured by a coating thickness gauge.
Nowadays, the coatings may be only a few nanometers thick, as well as on the contrary, very thick, that is why the necessity to be able to measure the thickness of the film on the surface has become so acute and this is where a coating thickness gauge comes into play.
Thin coatings have found a wide application in many industrial sectors (textile, medical pharmaceutical, chemical, marine, oil, gas, production and packaging and many others).
In spite of the thickness, such Nano-coatings are capable of significantly improving the quality, durability and resistance of the basic material, and thus, of the whole product. The producers opt for thin nanocoating, since it provides additional protection against corrosive and similar negative influences, bad weather and changeable ambient conditions, heat / water / ice, reduces friction and thus, wear-out, possesses anti-bacterial function, protects against EMF.
Thin coatings are applied in the mirrors production, so that the glass could reflect instead of being transparent. Thermal spray thin coatings are often applied with a protective purpose even on the surface of constructions, buildings, planes.
Depending on the substrate the coatings may be absolutely different: metallic, oxide, inorganic, non-conductive, applied by thermal spraying etc. Type of coating is selected based on the properties of the substrate material. For example, in medical sphere, experiments with Chrome-Nitride have been carried out. One of the coatings applied in the past was electroplated chromium (VI), but nowadays its application is reduced with the possibility of being stopped.
Surfaces requiring protection, smoothness and robustness get metal oxidic film, as well as alloys; besides, rhodium, copper and even base on gold or silver. Glass substrate often gets a variety of optical reflective and non-reflective coatings, depending on the application task. Some coatings provide a high-level infrared protection with an absolute transparency. Innovative technologies introduce silicon coatings, which are suitable for application on objects of different shapes. Besides metal, plastics / polymers, ceramics, textile fabrics can be taken as substrate.
While thin coatings are gaining more and more popularity among the producers, there is a demand for thick coatings, which sometimes reach the thickness of 50 and even 60 mm, measurable with a PCE coating thickness gauge. Such coatings are required for a protection of metal (iron) and non-ferrous metal surfaces from extreme external influence, like fire, water, shocks etc.
It’s most suited for ships, pipelines and for those environments where an object / device is exposed to extreme temperatures. The main task of a thick coating is to reduce the interaction of the main substance with the outer factors and diminish the risk of friction, wear-out or damage. A coating thickness gauge can help assess if this requirement has been fulfilled or not. For the pipelines protection against corrosion is very important and thus thick coatings are recommended (polypropylene).
Thick coating often consists of a few layers, applied by depositing certain paste / solution / 
mixture and then drying, while thin coating is applied by other methods (for example, sputtering).
The right coating thickness gauge must be carefully chosen here. Galvanized zinc coating is another example of thick coating applied on steel, though there are a few problems connected with firmness and optical look then. To achieve better results, galvanizing is supported by painting.
Coating type and methods of application requirements are defined in ISO standards and the measurements should be carried out in compliance with the existing regulations. Modern technology, besides destructive methods, allows NDT method application for thickness measurement with a variety of thickness gauges available (ultrasonic gauge, electronic magnetic coating thickness gauge, eddy current gauge etc.).
A coating thickness gauge is used to measure the thickness of coatings the material of which differs from that of the substrate. To ensure that the values measured with a coating thickness gauge are correct, the devices are calibrated. Calibration means checking the measuring accuracy of a device. This check can be carried out, for example, with the help of so-called calibration standards. For calibrating scales, weights of a certain accuracy are used.
For calibrating a coating thickness gauge, calibration foils are used. The respective coating thickness is usually noted on these foils so that it can be compared very easily to the measured value of the device. Often, a set of calibration foils and a base plate for metallic and non-metallic substrates is already included with the coating thickness gauge. For special measurements, it may be useful to have additional calibration foils and the respective base plates for the materials to be tested. Regarding the coating substrate, it is important to note that different surface structures and roughnesses can also have an effect on the measurement result.
The reason for and frequency of calibrations can vary considerably depending on the 
coating thickness gauge and its area of application. In general, it is recommended to recalibrate a coating thickness gauge before the first measurement and to recalibrate it on a substrate as similar as possible each time the coating substrate is changed . Some models should also be calibrated whenever the coating thickness range is changed, for example when first testing parts with a required 0.07 millimetre coating thickness and then testing parts with a coating thickness of, e. g., 0.28 millimetres.
This type of coating thickness gauge is then tested with the most suitable film for the area to be tested on the corresponding substrate before the measurement series is started. This procedure is called single-point calibration as the coating thickness gauge is only tested for one specific value and, if necessary, adjusted for this value. Other models with multi-point calibration can be checked by calibrating with different foils in one calibration procedure at different coating thicknesses and, if necessary, corrected via the device menu. These devices can then be used to measure a wide variety of film thicknesses without recalibration.
If it is necessary as part of operational quality assurance, a coating thickness gauge can of course also be calibrated at an external laboratory. There are two different standards for the procedure of these calibrations: one according to DIN EN ISO 9001 and the more complex one according to DIN EN ISO 17025, which is also called DAkkS calibration.
With both procedures, a calibration certificate is issued in which the procedure of the check, the measurement results and the deviations are documented. These certificates can be used to prove the accuracy of the coating thickness gauge at the time of testing. In addition, it can be assumed that the device also measured correctly in the period between two calibrations in which the device-specific requirements for accuracy were met.
Various non-destructive methods have been established for the measurement of the coating thicknesses. These measuring methods can be subdivided according to various aspects. Among the decisive criteria for the selection of equipment are the suitability of the method for the material and the measurement conditions.
After the contact with the component to be tested:
Contact methods according to the substrate of the coating:
In this type of the coating thickness gauge, a magnetic flux is generated to the ferromagnetic base material by low frequency current. The device probe detects the magnetic resistance, which is increased by non-magnetic coatings. Since there is a direct relationship between this resistance and the thickness of the coating, the coating thickness gauge can determine the coating thickness from the measured value. The magnetic inductive coating thickness gauge can therefore determine the thickness of all non-magnetic coatings on iron and steel. The thickness of protective coatings made of zinc, chromium, enamel or paint can be checked easily and non-destructively at any time with the compact devices. Corrosion and fire protection coatings on steel components at risk can therefore be checked regularly without great effort.
The coating thickness gauge that uses the eddy current method induces eddy currents in electrically 
conductive material by means of high-frequency current. If there is a non-conductive coating between the probe and the conductive base material, the magnetic field of the sensor is weakened by the magnetic field of the generated eddy currents. From the strength of the change in the sensor magnetic field, the coating thickness gauge can determine the thickness of the insulating coating. The coating thickness gauge can use the eddy current method to measure the thickness of electrically non-conductive paints or coatings on non-magnetic but electrically conductive substrates.
The ultrasonic coating thickness gauge can measure coatings on metals and non-metals. Transmitter and receiver are usually arranged in the same probe for this purpose. The emitted ultrasound penetrates the coating and is partially or completely reflected by the surface of the base material. In order for the coating thickness gauge to calculate the coating thickness from the time it takes for the reflected sound waves to arrive, the sound velocity of the coating material must be known and selected in the gauge. Some models of the ultrasonic coating thickness gauges offer the possibility to determine the sound velocities on material samples with known thickness and to store them as material value.
In thermographic methods, the surface of the coated elements is heated and the cooling behaviour over time is made visible on thermal images. The smaller the coating thickness is, the faster the temperature drops. There are no special requirements regarding conductivity, light transmission or colour for the materials of the substrate and coating. A photothermal coating thickness gauge allows the coating thickness to be determined with micrometre accuracy. With a single measurement, a large area can be inspected with little time required. Irregularities of the coating are immediately visible in the thermal image. Direct conclusions for adjustments to the coating process can be drawn from the distribution and position of the too high or too low coating thickness.