Update Technology of Coating Thickness Gauge
At present, both well-known brands and general manufacturers both domestically and internationally require the following steps for the operation of their thickness gauges:
1. Zero adjustment, that is, zero adjustment on a specific zero plate or zero adjustment on the raw substrate that needs to be measured;
According to the different measurement ranges of the measuring products, adjust the values with appropriate test pieces to reduce measurement errors.
In general, this method is not a problem when purchasing and using new instruments, but it is a bit cumbersome.
But after using the probe for a period of time, the problem arises. Our instrument measurement accuracy has been greatly reduced during operation.
It's difficult to grasp. The reason lies in the principle of the product, which is a fatal flaw, that is, the probe uses a magnet to wrap around the coil.
After applying current, a magnetic field is generated, which is irregular.
Fortunately, there is now a new type of coating thickness gauge, FT200 coating thickness gauge, which uses the latest magnetic sensing technology.
The Hall effect, as we know it, was discovered by Hall in 1879. By studying the relationship between Hall voltage and working current, measuring the magnetic field and permeability of electromagnets, and studying the relationship between Hall voltage and magnetic field, Hall found that the potential difference U H is directly proportional to the current intensity I H, directly proportional to the magnetic induction intensity B, and inversely proportional to the thickness d of the thin film.
This magnetic field becomes regular. When this principle is applied to a coating thickness gauge, there is no need to adjust the test piece again. Especially when measuring products with circular or concave surfaces, it is simpler and more convenient to use.
