Ultrasonic Thickness Gauge Leeb 330 – Doryang

This device adopts the ultrasonic measurement principle and is suitable for measuring the thickness of various materials that allow ultrasonic waves to propagate at a constant speed within them and reflect from their back surfaces.

Application Range:

This instrument can measure various plates and processed parts. Another important application is monitoring pipelines and pressure vessels in production equipment to detect the extent of thinning due to corrosion during use. It is widely applicable in petroleum, chemical, metallurgy, shipbuilding, aviation, aerospace, and other fields.

Basic Principle:

The principle of ultrasonic thickness measurement is similar to that of optical wave measurement. The probe emits ultrasonic pulses that reach the back surface of the measured object and propagate through it. When these pulses reach the material’s boundary, they reflect back to the probe. By measuring the time the ultrasonic waves take to travel through the material, the thickness of the material is determined.

Features and Functions:

1. For composite and unknown materials with known thickness, it can reverse-measure the sound velocity.
2. It allows setting upper and lower tolerance limits with an automatic alarm if exceeded.
3. Bilingual operation menu (Chinese and English).
4. Status indication function.
5. Suitable for measuring the thickness of good ultrasonic conductors with a sound velocity of 5920 m/s.
6. Instrument calibration function.
7. Coupling status indication function.
8. High-brightness LED backlight display for use in dim environments.
9. Remaining battery power indication function.
10. Power-saving features, including auto-sleep and auto-shutdown.
11. Compact, portable, and highly reliable, suitable for harsh operating environments, resistant to vibration, impact, and electromagnetic interference.
12. Metric and imperial unit options.

Technical Parameters:

• Model: Dor Yang 330
• Measurement Range: 0.75–350mm (steel, specific range depends on the probe)
  • Standard probe range: 1–250mm
• Storage: None
• Display Resolution: 0.1mm
• Sound Velocity Range: 5920m/s
• Surface Temperature: -10 to 60℃
• Measurement Error: ±(1%H+0.1)mm (H = actual measured thickness)
• Low Voltage Indication: Yes
• Auto Power-Off: Yes
• Power Supply: Two AA alkaline batteries
• Operating Time: Approximately 200 hours
• Dimensions: 130×70×25mm
• Housing: Metal casing
• Weight: Approx. 0.2kg (main unit)