YUSHI UM4 Gen3 ultrasonic thickness gauge supports through-coating measurement up to 30mm, MEVERT verification, real-time A/B-scan, IP67 protection and data logging. Ideal for metal corrosion, pipeline, pressure vessel industrial inspection.
--Industrial Through-Coating & Corrosion Thickness Tester with A/B-Scan & MEVERT Technology
YUSHI UM4 Gen3 Series ultrasonic thickness gauge is a high-precision industrial thickness testing instrument, designed for fast and reliable field measurement. It supports through-coating thickness measurement up to 30mm, adopts MEVERT multiple-echo verification technology, and is equipped with real-time A-scan and B-scan display functions. With IP67 waterproof and dustproof protection, it is widely used in metal corrosion detection, pressure vessel, pipeline and boiler thickness inspection.
Penetrates coatings up to 30mm (single-element probe) / 5mm (dual-element probe) and displays accurate substrate thickness without manual parameter adjustment.
Analyzes intervals of 3+ consecutive back-wall echoes to distinguish coating echoes from substrate echoes, ensuring stable and verified readings.
A-scan supports RF, inverted RF, half-wave, and full-wave modes; B-scan provides cross-sectional imaging to visualize corrosion distribution and capture minimum thickness automatically.
0.01mm resolution; steel measurement range: 0.7mm–480mm; built-in sound velocity table for 52 common materials.
Auto probe matching (excitation, damping, sampling frequency); guided calibration with live waveform; one-touch zoom/freeze; min/max & alarm functions.
Stores up to 100,800 readings, 400 setups, and 400 A/B-scan images; equipped with DataView PC software; Mini-USB for data transfer & charging (Bluetooth/RS232 optional).
IP67 protection (1m underwater for 30 minutes); rubber protective sheath, hands-free stand, and 4-point neck strap; 22-hour continuous operation on 2 AA batteries.
| Specification | UM4D Gen3 | UM4M Gen3 | UM4 Gen3 |
|---|---|---|---|
| Supported Probes | Single-element | Dual-element | Single/Dual-element |
| Measurement Modes | P-E, E-E | E-E, MEV | P-E, E-E, MEV |
| Coating Penetration | Up to 5mm | Up to 30mm | Up to 30mm |
| Real-Time A/B-Scan | ✔ | ||
| IP67 Protection | ✔ | ✔ | ✔ |
| Standard Probe | TC510 | M5M10 | M5M10 |
Eliminates coating interference for accurate substrate thickness readings
Works with single-element protective membrane probes
Supports through-coating measurement up to 30mm
Delivers highly reliable, verified measurement values
Dual-element probes: Small dead zone, strong echo energy, ideal for single-echo (P-E) measurement
Single-element protective membrane probes: High energy, strong penetration, optimized for multiple-echo (MEV) measurement
Measurement Mode Application
| Application | MEV | E-E | P-E |
| Uncoated corroded metal | ✔ | ||
| Through coatings (≤5mm) | ✔ | ✔ | ✔ |
| Through coatings (≤30mm) | ✔ | ||
| Severely corroded coated metal | ✔ | ✔ | |
| High-temperature measurement | ✔ | ||
| Plastics, cast iron & attenuating materials | ✔ |
UM4 Gen3 ultrasonic thickness gauge
Standard probe (with test report)
Probe cable
Rubber protective sheath with stand
4-point neck strap
2 AA alkaline batteries
Couplant
Mini-USB cable & USB flash drive
User manual & calibration certificate
Bluetooth communication module
High-temperature probes & dedicated cables
High precision, easy operation, IP67 rugged design, professional through-coating measurement function, complete data management, perfect for long-term industrial thickness testing.
| Parameter | UM4D Gen3 | UM4M Gen3 | UM4 Gen3 |
|---|---|---|---|
| Probe Type | Dual-element probe | Single-element protective membrane probe | Dual-element probe / Single-element protective membrane probe |
| Measurement Mode | P-E (Pulse-Echo) E-E (Echo-Echo) | E-E (Echo-Echo) MEV (Multiple Echo Verification) | P-E (Pulse-Echo) E-E (Echo-Echo) MEV (Multiple Echo Verification) |
| Measurement Range in Steel | 0.7mm ~ 480mm | 0.8mm ~ 230mm | 0.7mm ~ 480mm |
| Sound Velocity Range | 310m/s ~ 18699m/s | ||
| Resolution | 0.1mm/0.01in; 0.01mm/0.001in | ||
| Measuring Unit | mm, inch | ||
| Display Update Rate | 4Hz, 8Hz, 16Hz optional | ||
| Measuring Functions | Upper/Lower limit alarm, Min/Max value, Difference/Reduction Rate, B-Scan | ||
| Parameter | Specification |
|---|---|
| Capacity | 400 grid files, each file 252 cells Total 100,800 measurement values, 400 sets of configuration parameters and A/B-Scan images |
| Software | Supplied with PC software, data cable and USB drive |
| Parameter | Specification |
|---|---|
| Display Screen | 2.4 in (320 × 240 dot matrix) IPS wide-angle color display |
| Rectification Modes | RF, Inverted RF, Full-wave, HALF+, HALF- (supported on UM4 Gen3) |
| View Mode | Large Digits, B-Scan, A-Scan, A-Scan+storage grid (UM4 Gen3) |
| Parameter | Specification |
|---|---|
| Probe Connector | Lemo 00 × 2 |
| Communication Interface | Mini USB (optional RS232, Bluetooth) |
| Parameter | Specification |
|---|---|
| Operating Temperature Range | -10°C ~ 50°C |
| Housing | Impact-resistant, waterproof, with sealed gasket, designed to IP67 standard |
| Dimensions | 153mm × 76mm × 37mm (H × W × D) |
| Weight | 280g including battery |
| Power Supply | Two AA batteries Optional power supply via USB port |
| Battery Working Time | Up to 22 hours with two AA alkaline batteries Up to 22 hours with two AA lithium batteries |
| Instrument Shut-Off | Selectable automatic shut-off after 5, 10, or 20 minutes of inactivity, or manual shut-off only |
The YUSHI UM4 Gen3 ultrasonic thickness gauge is widely used in:
Metal corrosion and thickness inspection
Pressure vessel, pipeline & boiler testing
Petrochemical & power industrial maintenance
Automotive, aerospace & marine manufacturing
Field portable industrial thickness measurement
Add：U39, No. 81-43, Puhe Road, Hushitai Street, Shenbei New District, Shenyang, Liaoning, China 110136
E-mail：athena.w@yushindt.com
WeChat ID：965317198
Mobile / Whatsapp： +86 18602468800
❤Contact us for Best available pricing and Custom solutions.
