Accurate material thickness testing plays a vital role across modern industrial production. Multiple thickness-measuring instruments / thickness gauges are available on the market, built on different working principles to complete precise thickness detection for diverse workpieces. Common categories include paper thickness gauge, film thickness gauge, coating thickness gauge, X-ray thickness gauge, in-line thickness measuring equipment, ultrasonic thickness gauge, pressure-type thickness tester, white-light interferometry thickness meter, electrolytic thickness gauge, mechanical contact thickness gauge, and more.
Among these diverse thickness testing devices, five types are widely adopted for daily industrial quality-control work: coating thickness gauge, film thickness gauge, paper thickness gauge, ultrasonic thickness gauge, and X-ray thickness gauge. Below we break down their core principles and typical application scenarios.
1. X-ray Thickness Gauge
The X-ray thickness gauge is a non-contact dynamic measuring instrument. It works based on the principle that X-ray intensity decreases correspondingly when X-rays penetrate materials of different thickness. Centered on PLC and industrial computers, it collects and calculates measurement data, and outputs deviation values to rolling mill control systems to maintain target rolling thickness. This equipment is widely deployed in non-ferrous metal strip and foil processing, as well as metallurgical plate-and-strip manufacturing workshops.
2. Ultrasonic Thickness Gauge
The ultrasonic thickness gauge is a popular non-destructive thickness-testing tool. It adopts the ultrasonic pulse-echo principle: the transducer probe emits ultrasonic pulses travelling through the test object, and pulses bounce back once they hit material interfaces. The instrument calculates material thickness precisely by recording the round-trip propagation time of ultrasonic waves. This instrument fits any homogeneous material where ultrasonic waves can travel at stable velocity, making it a go-to choice for wall-thickness inspection for pipes, vessels and solid workpieces.
3. Coating Thickness Gauge
The coating thickness gauge is designed for measuring coating layer thickness on ferrous and non-ferrous metal substrates. It supports quick non-destructive readings for paint, plating and surface claddings, and is heavily used for surface-finish quality checks in metal-processing industries.
4. Film Thickness Gauge
A film thickness gauge is developed for measuring thin-film and sheet-material thickness. It delivers broad measuring range and high testing precision, and comes with practical functions including data output, arbitrary zero-point reset, metric-imperial unit conversion, and auto power-off. Manufacturers rely on it for routine dimensional verification of flexible thin materials.
5. Paper Thickness Gauge
The paper thickness gauge is applicable for thickness measurement of films, paper, paperboard and other sheet-form materials within 4 mm thickness, covering most common paper-product and thin-sheet quality-inspection demands.
Conclusion
For factories struggling to select proper thickness-measuring instruments, choosing suitable hardware matching your test objects and working conditions is critical for stable quality control. Mikrosize is dedicated to delivering one-stop industrial measurement solutions. We supply high-quality thickness-testing instruments and other precision metrology equipment, to help enterprises complete reliable material thickness inspection and optimize overall production quality. Whether you need standard-model gauges or application-oriented customized measurement support, Mikrosize can provide professional technical consultation and dependable product supply for your projects.
