The difference between ultrasonic thickness gauge and coating thickness gauge
Coating thickness gauges and ultrasonic thickness gauges are both non-destructive testing instruments, that is, instruments that measure the thickness of materials without destroying materials. Both coating thickness gauges and ultrasonic thickness gauges can measure the thickness of materials through probes One-sided contact measurement of material thickness. This avoids the disadvantages of calipers, micrometers, gauges, etc. that need to be stuck from both sides to measure thickness, and takes advantage of non-destructive testing, so it is widely used in plate manufacturing, pipeline anticorrosion, electroplating coating, mechanical parts manufacturing, aerospace and other important field. Coating thickness gauges and ultrasonic thickness gauges are used in the measurement of material thickness in different fields. In fact, the coating thickness gauge focuses on the measurement of the surface coating, while the ultrasonic thickness gauge focuses on the measurement of the base material of the wall thickness and plate thickness.
The Difference: Coating Thickness Gauge
Coating thickness gauge is also called coating thickness gauge, coating thickness gauge, coating thickness gauge, film thickness gauge and other flexible names. It is mainly used to measure coatings, anti-corrosion layers, electroplating layers on metals, The thickness of covering layers such as plastics, paints, plastics, ceramics, enamel, etc., so the official name of the national standard is the cladding thickness gauge. It can also be extended to indirect measurement of the thickness of paper, film, board, etc. The accuracy of the coating thickness gauge is relatively high, generally in the unit of um, and the display resolution can reach 0.01, 0.1, 1um and other accuracy. The measuring range of the 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 called: 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, phosphating, Chromium, zinc, lead, aluminum, tin, cadmium, porcelain, enamel, oxide layer, etc.
Eddy current method: Non-ferrous base coating thickness gauge uses eddy current sensors to measure enamel, rubber, paint, plastic layers, coatings, etc. on copper, aluminum, zinc, tin and other non-ferrous metal substrates. Coating thickness gauges are widely used in manufacturing, metal processing, 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 substrates instead of measuring the thickness of coatings and coatings. Other names of ultrasonic thickness gauge: ultrasonic thickness gauge (abbreviated as UT), ultrasonic measuring instrument, wall thickness measuring instrument, steel plate thickness measuring instrument, etc., the national standard professionally named ultrasonic thickness measuring instrument. The precision of the ultrasonic thickness gauge is in mm, and the display resolution is generally: 0.1, 0.01, 0.001mm, etc. The range of the ultrasonic thickness gauge is generally 0.75-300mm, and the special one is 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, and is reflected back to the probe when it reaches the material interface, and the thickness of the material to be measured is determined by measuring the time that the ultrasonic wave propagates in the material. It is suitable for measuring all sound-conducting materials, such as steel, iron, metal, plastic, ceramics, plexiglass and other good ultrasonic conductors.
