Ultrasonic Thickness Gauge
Yushi Instruments is a high-tech R&D-centered enterprise dedicated to providing high-quality ultrasonic testing (UT) equipment to the world. The company was founded in 1985 (formerly known as Shenyang Flaw Detection Machine Factory) and officially established in 2011. After more than a decade of dedicated innovation, we have grown to become a leader in China's non-destructive testing (NDT) industry. Our award-winning, multi-patented products such as the 2024 PM5 Gen2 and 2025 PM5 Gen3 Ultrasonic Thickness Gauge have received national patents and international certifications, fully reflecting our commitment to excellence.
YUSHI now has developed 8 categories of NDT products:
| Ultrasonic Thickness Gauge | Ultrasonic Flaw Detector |
| Ultrasonic Pulse Generator and Receiver | Coating Thickness Gauge |
| LEEB Hardness Tester | Industrial LED Film Viewer |
| Black and White Densitometer | UV NDT Lamp |
Why Choose YUSHI?
We offer a variety of precise testing instruments.
Keep Technical Innovation
Rich experience of R&D and strong abilities drive the development of ultrasonic thickness solutions like the PM5 Gen2 and PM5 Gen3.
Customer's Requirement Oriented
We listen the real requirements from our all customers, from end users to distributors,treating every need with equal importance.
Customized Solution
We offer customized instruments and accessories based on our clients' specific needs.
Throughtful Service
Our commitment extends far beyond delivery, encompassing vital after-sales services including maintenance, calibration, and software updates.
The Advantages of Ultrasonic Testing
- High Accuracy and Precision
UT possesses unique characteristics that make it provide with ultra high accuracy in various material thickness measurement, and locating internal flaws in thick or complex-construction materials.
- High Reliability For Diverse Applications
Ultrasonic examniations can be used on metals, non metals like plastic,composites, rubbers and more. It has very wide applications, such as pressure vessel and pipe inspection,aerospace parts and automobile stamping parts inspection, etc.
- Safety & Non-Hazardous Operation
Ultrasonic testing measures the thickness or inspects the detection by launching the harmless high-frequency sound waves, eliminating radiation riskes. That means ultrasonic inspection is more safe for operators and tested workpieces.
- Real-time Measurement and Display
Delivers thickness measurement immediately. Portable ultrasonic thickness gauge can display the accurate, real-time thickness measurement.

What is Ultrasonic Thickness Gauge?
Industrial ultrasonic thickness gauge is a kind of portable NDT instruments that utilizes ultrasonic technology to measure the thickness of material. It is widely used in industry to monitor the wall thickness of metal, piping etc. It is a key tool for preventive maintenance, quality control and safety inspections.
Core working principle
Ultrasonic thickness gauges use Ultrasonic Pulse Transmission principle. The thickness is calculated by the formula:
T= (V x △t)/2
Industrial Applications of YUSHI Thickness Gauges
Oil&Gas Petrochemical Industry
1.Pipeline and Pressure Vessels Inspection:YUSHI ultrasonic thickness meters measure wall thickness of pipelines, tanks and other pressure vessels to inspect the corrosion degrees of internal construction.The innovative Thru-coating Technology supports measurements of substrate metal thickness without removing the coating or painting,(Up to 20mm thick coatings)
2.Boiler and Heat Exchanger Inspection: YUSHI PM5 GEN2 and PM5 GEN3 ultrasonic thickness gauges can be equipped with Oxide Layer Measurement Mode, which can accurately measure the thickness of oxide layers on the inner tube wall. This powerful option can not only measure the thickness of oxide layers, but also can display the thickness of the tube.
Energy Industry
1.Fuel Power Plant Pipeline Inspection: The boilers and pressure vessels need more precise thickness measurement by the high-precision ultrasonic thickenss gauges. YUSHI PM5 GEN2 and PM5 GEN3 support efffective and high-accuracy boiler tube inspection(as above).
2.Wind Energy Devices and Thick Sections Inspection: YUSHI ultrasonic thickness testers can measure the thickness of blade laminate and structural components,such as glass fiber, composited materials, steel towers,etc. A special option-Large Range Measurement Mode can measure the thick sections even up to 38m.
Precision Manufacturing Industry
1.General Quality Control: Verify thickness of raw materials (sheet metal, sheet metal, bar stock), machined parts, castings, and forgings per specification. The high resolution option (0.0001mm) ensures the accuracy of critical components.
2.Coating/plating Thickness Inspection: YUSHI Ultrasonic Thickness Gauges withA/B scan functions can measure the thickness of paint, anodized, galvanized, or other coatings on a metal substrate (double measurement, coating pattern). This applies to automotive parts, electrical appliances and prefabricated structures.
3.Dual-metal Composites Inspection: Use the double or multiple measurement options to accurately measure the thickness of a single layer in a cladding material (e.g., stainless steel on carbon steel).
4.Aerospace and Automotive Parts Inspection: PM5 GEN2 has great capability for measuring thin plates, complex geometries (e.g., turbine blades with pen probes, automotive stamped R angles), engine components, and special coatings.
Aerospace Industry
1.Multilayer Composite Inspection: Use the MULTIPLE LAYER MEASUREMENT option to accurately measure individual layers in multiple layers of aircraft transparencies (windshields).
2.Composite Structures: Measure the thickness of fiberglass, carbon fiber composite, and other composite materials used in airframe and components. Low frequency probes and wide range options are beneficial.
3.Inspection of engine components: YUSHI provides UM-5 Dual-element ultrasoni thickness gauges and PM5 Series to help users solve the problems in high temperature measurement of turbine blades and casings.
Special Material and Innovative Material Technology
1.Plastics and Composites Inspection: measure the thickness of vessels, pipes, tanks and molded parts (e.g. fuel tanks, consumer goods). High resolution and wide range options for a variety of requirements.
2.Rubber and High-attenuation Materials Inspection: Measure thick rubber linings, tires, and seals using low-frequency probes designed for highly attenuating materials.
3.Absorbing Materials: Measure coatings designed for electromagnetic wave absorption (as highlighted in the document).
4.Cast Iron Analysis: Indirect assessment of Nodularity/Nodularity by sonic velocity relationship (specific calibration/reference required).UM-5 Series and PM5 Series ultrasonic thickness meters can transmitt the ultrasonic wave to the bottom of the workpieces despite of the coarse grain.
The Models Of YUSHI Ultrasonic Thickness Gauges

UM-1/1D Ultrasonic Thickness gauge
Display Type:LCD Screen
Measurement Principle:P-E(Pulse-echo),E-E(Echo-echo)
Measuring Range:0.8mm-300mm(Standard measurement);3mm-20mm(Through Coating)
Repeatability:0.1mm
Data Storage:5 arrays are divided to store 500 thickness values
UM-2/2D Ultrasonic Thickness Gauge
Model:UM-2/UM-2D
Measuring Range:0.8-300mm
Through Paint Mode:3-20mm(only for UM-2D)
Resolution:0.01mm
Data Storage:5 arrays are divided to store 500 thickness values


UM-3 Ultrasonic Thickness Gauge
Model:UM-3
Measuring Range:0.3-20mm
Resolution:0.001mm
Probe:Single-element D15A probe
Data Storage:5 arrays are divided to store 500 thickness values
UM-4D/4DL Ultrasonic Thickness Gauge
Model:UM-4DL
Measuring Range:0.6-508mm
Resolution:0.01mm
Display Mode: A-scan snapshot, Big Digital, Difference/Reduction Rate
Probe: Dual-element probes


UM-5D/5DL Ultrasonic Thickness Gauge
Model:UM-5D/UM-5DL
Measuring Range:0.6-508mm
Resolution:0.001mm
Display Mode:A-scan, B-scan, Big Digital, Difference/Reduction Rate
Probe: Dual-element probes,including PT08,TC510,TC550,ZT12,PT06,PT04 and GT12
Data Storage:100,000readings,1000 waveforms, 400 files
PM5 GEN2 Ultrasonic Thickness Gauge
Model:PM5 Gen2
Measuring Range:0.01mm-38mm,depending of the probe and material conditions
Measuring Mode:I-E,E-E,I-ME,AUTO,P-E,E-EV
Display Mode: Time-based A/B scan mode, Big Digital, Difference/Reduction Rate
Resolution:0.001mm,0.0001mm only for specified version
Probe:Single-element D15A probe
Store 100,000 thickness values and 400 parameter configuration files


Dual-element ultrasonic thickness probe
Dual element ultrasonic thickness probes are composited with two piezoelectric crystals. One of them is used for generating the ultrasound wave and another one is used for receiving the bottom signals.
single-element ultrasonic thickness Gauge
Single element ultrasonic thickness gauges are essential accessories for ultrasonic testing in NDT industry. This kind of probes utilize a single piezoelectric crystal both generate and receive high-frequency sound waves.These probes are special for their reliable accuracy and high sensitivity.

The Teating Cases of YUSHI Ultrasonic Thickness Gauges
UM-1




UM-2




UM-4 Series




UM-5 Series




PM5 GEN2

U-Shaped Tube

3-layer Windshield

Fiberglass

Organic Fluorine Material

Silicon Cable Sheeth

Automobile Stamping Parts

Egg Shell

Absorbing Coating
Why Choose YUSHI?
Professional Team
70% of our colleagues are professional talents in ultrasonic testing.
Laboratory-standard production workshop
YUSHI has 1200㎡ laboratory-standard workshop.Strict management based on international standards to prevent dust and static electricity.

Rich experience
YUSHI has more than 30 years of experience for manufacturing NDT instruments and 14 years of experience for exporting advanced products.
Worldwide Market
With 15 years of exportation, YUSHI has won the great reputation from cuatomers from 66 coutries and regions.
YUSHI Services For Thickness Gauges
Before the products leave the factory, the factory inspects the products strictly according to the standard, and the products can be shipped only after passing the inspection. All YUSHI products are of high quality in accordance with national and world standards.
Once the products are shipped out, if it is clear that it belongs to the quality problem of factory design and manufacture. YUSHI will provide repair and parts replacement service free of charge during the 12-month free warranty period.
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We're well-known as one of the leading ultrasonic thickness gauge manufacturers and suppliers in China. Please feel free to buy high quality ultrasonic thickness gauge for sale here from our factory. Contact us for more details.
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