The difference between a coating thickness gauge and an ultrasonic coating thickness gauge
Common points:
Both coating thickness gauges and ultrasonic thickness gauges are non-destructive testing instruments, that is, instruments that measure the thickness of materials without destroying the material. Both coating thickness gauges and ultrasonic thickness gauges can detect the thickness of the material through the probe. Contact thickness measurement on one side of the material. This avoids the disadvantages of calipers, micrometers, gauges, etc. that need to be jammed from both sides to measure thickness, and gives full play to the advantages of non-destructive testing, which is widely used in plate manufacturing, pipeline anti-corrosion, electroplating and coating, mechanical parts manufacturing, aerospace and other important field. Coating thickness gauges and ultrasonic thickness gauges are used in material thickness measurement in different fields. In fact, coating thickness gauges focus on the measurement of surface coatings, while ultrasonic thickness gauges focus on base material measurements of wall thickness and plate thickness.
Difference: coating thickness gauge
Coating thickness gauge is also called coating thickness gauge, coating thickness gauge, coating thickness gauge, film thickness gauge and other various names. It is mainly used to measure coatings, anti-corrosion layers, electroplating layers on metal, The thickness of the covering layer of plastic, paint, plastic, ceramics, enamel, etc., so the national standard is officially named the covering thickness gauge. It can also be extended to indirect measurement of the thickness of paper, film, plate, etc. (For indirect measurement methods, please call Times Peak Company at 13366901010). The coating thickness gauge has relatively high accuracy, generally in um, and the display resolution can reach 0.01, 0.1, 1um and other precisions. The measuring range of coating thickness gauge: generally 0-1250um; special ones are 0-400um and 0-50mm.
There are currently two most mainstream coating thickness gauges: magnetic method and eddy current method, also known as: magnetic and non-magnetic method, iron-based and non-ferrous-based method.
Magnetic method: The iron-based coating thickness gauge uses a magnetic sensor to measure non-ferromagnetic coatings and coatings on ferromagnetic metal substrates such as steel and iron, such as: paint, powder, plastic, rubber, synthetic materials, phosphated layers, Chromium, zinc, lead, aluminum, tin, cadmium, porcelain, enamel, oxide layer, etc.
Eddy current method: The non-ferrous coating thickness gauge uses an eddy current sensor to measure enamel, rubber, paint, plastic layers, coatings, etc. on non-ferrous metal substrates such as copper, aluminum, zinc, tin, etc. Coating thickness gauges are widely used in manufacturing, metal processing industry, chemical industry, commodity inspection and other testing fields.
Difference: Ultrasonic thickness gauge
Ultrasonic thickness gauges are mainly used to measure the thickness of steel plates, steel pipes and other base materials rather than measuring the thickness of coatings and coatings. Other names for ultrasonic thickness gauges: ultrasonic thickness gauge (UT for short), ultrasonic measuring instrument, wall thickness measuring instrument, steel plate thickness gauge, etc. The national standard is professionally named ultrasonic thickness gauge. The accuracy of ultrasonic thickness gauge is in mm, and the display resolution is generally: 0.1, 0.01, 0.001mm and other precisions. The measuring range of ultrasonic thickness gauge is generally 0.75-300mm, especially 0.15-20mm; 3-500mm.
The principle of ultrasonic thickness gauge: the ultrasonic pulse emitted by the probe reaches the object to be measured and propagates in the object. When it reaches the material interface, it is reflected back to the probe. The thickness of the material to be measured is determined by measuring the time for the ultrasonic wave to propagate in the material. Suitable for measuring all sound-conducting materials, such as steel, iron, metal, plastic, ceramics, organic glass and other good conductors of ultrasonic waves.
