Description

The TUM-4DL Ultrasonic Thickness Gauge is a high-precision non-destructive testing instrument designed for accurate material thickness measurement across metals and non-metals. Equipped with A-Scan waveform capability, it allows users to verify readings and detect internal corrosion, scaling, and defects that standard thickness gauges cannot identify.

Using dual measurement modes (Pulse-Echo and Echo-Echo), the UM-4DL can measure material thickness directly through coatings up to 2mm without surface preparation. This makes it ideal for inspections where removing paint or coatings is not practical.

With a wide measurement range of 0.6–508mm, high resolution of 0.01mm, and built-in data storage with USB connectivity, the UM-4DL is a reliable and efficient tool for maintenance teams, inspectors, and industrial applications.

Why A-Scan Matters

Unlike standard thickness gauges that only display a numeric reading, the UM-4DL provides an A-Scan waveform snapshot, allowing users to visually verify measurements.

This is essential for:

• Detecting internal corrosion and scaling inside pipes
• Identifying pitting vs uniform wall loss
• Confirming measurement accuracy on rough or coated surfaces
• Distinguishing between multiple echo signals

Standard gauges give you a number. A-Scan shows you what’s happening inside the material.

Features

• A-Scan waveform snapshot for measurement verification
• Through-coating measurement (up to 2mm coating)
• Dual modes: Pulse-Echo (P-E) and Echo-Echo (E-E)
• High resolution: 0.01mm
• Wide measuring range: 0.6–508mm
• Built-in data storage (up to 100,000 readings)
• USB connectivity for data export
• Adjustable update rate (4Hz / 8Hz / 16Hz)
• 2.4” color LCD display
• Multi-language interface
• Automatic V-path correction
• Max/Min capture and differential measurement modes
• Stable performance in harsh environments (-10°C to 50°C)
• Simple operation with intuitive interface

Specifications

Model: UM-4DL
Measuring Modes: P-E / E-E
Measurement Range: 0.6 – 508 mm
Resolution: 0.01 mm
Through Coating: Up to 2 mm
Display: 2.4” Color LCD (320 × 240)
Sound Velocity Range: 500 – 9999 m/s
Update Rate: 4 / 8 / 16 Hz
Operating Temperature: -10°C to +50°C
Power Supply: 2 × AA batteries (approx. 24 hours)
Dimensions: 153 × 76 × 37 mm
Weight: 280 g

Model Comparison

• UM-4DL: A-Scan snapshot, data logging, through coating
• UM-5DL: Real-time A-Scan + B-Scan, advanced signal control

Variants

Probe Type

• Standard Probe (General Use)
• Small Tube Probe
• High Temperature Probe (Up to 480°C)
• Cast Iron Probe

Delivery Scope

• UM-4DL Thickness Gauge
• Standard Probe
• Couplant Gel
• Carry Case
• Batteries
• User Manual

Industries Used In

• Oil and gas inspection
• Pipeline maintenance
• Manufacturing and fabrication
• Power generation
• Marine and shipbuilding
• Automotive inspection
• Infrastructure and construction
• Non-destructive testing (NDT)

Downloads

Datasheet