What common sense do you need to know when purchasing a high-precision coating thickness gauge?
The high-precision coating thickness gauge adopts the principle of ultrasonic measurement, which can make the ultrasonic wave propagate inside it at a constant speed, and can measure the thickness of various materials reflected from its back. This instrument can accurately measure various plates and various processed parts. Another important aspect is that it can monitor various pipelines and pressure vessels in production equipment, and monitor their thinning degree after being corroded during use. Can be widely used in petroleum, chemical industry, metallurgy, shipbuilding, aviation, aerospace and other fields.
Measuring principle and selection method of high-precision coating thickness gauge:
To put it simply, the use of high-frequency AC signals will generate an electromagnetic field in the probe coil, and an eddy current will form when the probe is close to a conductor (usually a metal). The size of the eddy current has a certain relationship with the distance between the probe and the conductive substrate. When the probe is closer to the conductive substrate, the eddy current will be larger and the reflection impedance will be larger. When the probe is farther away from the conductive substrate, the eddy current will be smaller and the reflection impedance will be smaller. This value directly indicates the distance between the probe and the conductive substrate, that is, the thickness of the coating. It can be used to measure the thickness of paint, enamel, plastic, anti-corrosion coating, fire-proof coating, etc. on the surface of magnetic metal substrates such as steel. As well as measuring coating thickness on non-conductive substrates. For example, home appliances, aluminum alloy doors and windows, plastic coatings on the surface of non-magnetic metal substrates, and anodized films.
High precision coating thickness gauge
The selection method of high-precision Cangzhou Oupe coating thickness gauge is as follows:
1. Select according to the size of the material to be tested
To measure the coating thickness of materials such as conventional planes and grooves, one-piece or split-type coating thickness gauges can be used. If the measured object is relatively small, such as screws, nuts and special-shaped materials, a probe-type surface coating thickness gauge can be used. In order to measure the accuracy, it can also be tested with the hand pressure test rack.
2. Select according to the measurement occasion
If the surface of the object to be measured is flat and the space is large, you can use a coating thickness gauge with an integrated host and measuring head. If the measurement space is relatively narrow, you can use a split-type coating thickness gauge.
3. Choose according to the measurement range
According to the coating thickness on the surface of the measured object, choose a coating thickness gauge with a suitable measurement range. For thinner paint coatings, choose a coating thickness gauge with a small range. For other fire-resistant and anti-corrosion coatings, a coating thickness gauge with a large range can be selected.
