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What is the difference between contact and non-contact coating thickness gauges

What is the difference between contact and non-contact coating thickness gauges


Many friends who are new to thickness measuring instruments may not be confused. The contact coating thickness gauge and the non-contact coating thickness gauge are also for coating thickness. What is the difference between them, then Guoou instrument will be introduced to everyone:

Non-contact coating thickness gauge

What is a non-contact coating thickness gauge

The non-contact type can be well understood from the literal meaning. The thickness of the coating can be measured without touching the coating. Generally, the non-contact coating thickness gauge is divided into two types: laser and eddy current, which are applied to steel plate, steel strip, Surface treatment technologies such as paper, coating, board, film, sheet, paint, electrophoresis layer, etc.

What is a contact coating thickness gauge

The contact type is divided into one-piece and split-type structures. No matter which type of structure, it is necessary to rely on the probe to touch or press on the coating to indicate. Then, according to the principle of different sound speeds of different materials, it can measure multi-layer structures and various differences. The film thickness of the material can also detect material damage. For surface treatment, the limitation is still the timing of inspection, and the final film thickness inspection can only be performed after the curing is completed. It is applied to the surface of galvanized layer, aluminum-plated layer, zinc-aluminum alloy, aluminum-zinc alloy, etc., non-metallic coating, plastic coating, electroplating layer, composite coating, etc.

What is the difference between non-contact and contact coating thickness gauges

Non-contact coating thickness gauges From the production point of view, non-contact coating thickness gauges are more commonly used. During the production process, most surface treatment plants, whether automatic or manual coating, will encounter one The common problem is how to reasonably control the thickness of the coating. The purpose of the non-contact film thickness meter is to detect film thickness deviations early, improve process quality, and provide customers with high-standard coating products, with evidence-based testing data, improve testing quality, save materials, and reduce rework costs. In terms of volume, even the portable non-contact coating thickness gauge is larger than the contact type.

Contact coating thickness gauges are mostly used on objects that have already been produced. Whether it is company internal quality inspection, procurement quality inspection, commercial inspection, automotive paint inspection, structural part acceptance and other scenes, the application area is relatively wider. widely. Therefore, the contact-type figure-side thickness gauge will be smaller in shape and structure, easy to carry, and flexible, and has a wide range of characteristics.