1. Capable of storing 999 sets of measurement results and saving 18 sets of sound velocities. The maximum, minimum, and average values can be retrieved and analyzed.
2. Characterized by low power consumption, eliminating the need for frequent battery replacement.
3. Features a coating - penetration measurement mode. This enables accurate measurement of the thickness of the substrate beneath the coating without the necessity of removing the coating on the workpiece surface.
4. The device features built-in sonic velocities for 19 common materials, thus enhancing the efficiency of testing procedures.
5. Adopts the QC (Quality Control) measurement mode, which allows for a rapid determination of whether the material thickness meets the specified standards.
6. Utilizes a high - sensitivity dual - crystal probe. This probe effectively reduces clutter signals. The probe housing is fabricated from stainless steel, ensuring robustness and long - lasting performance.
7. Integrates a professional timing chip with a precision of 0.000001 milliseconds. This chip accurately calculates the propagation time of ultrasonic pulses within the measured material, resulting in highly precise data.
8. Can automatically select an appropriate multiple of the ultrasonic signal based on the material type and thickness.

Precautions
1. The sound velocity is a crucial parameter in ultrasonic thickness measurement. Only by setting the accurate sound velocity can valid thickness values be acquired. It is advisable to utilize a material with a known thickness and of the same type as the specimen to be measured for setting the sound velocity.
2. The probe should be positioned precisely at the center of the measurement point. Ensure that the outer periphery of the probe does not protrude beyond measured surface. 
3. The opposite surface of the measured material must be parallel or coaxial to the measured surface. 
4. During the measurement of curved surfaces, align the probe's split surface perpendicular to the curvature axis during measurement.
5. For coarse - grained materials such as cast iron that cause significant ultrasonic scattering . Thus, a coarse - grained probe is required for measurement. Since the probe is vulnerable to scratching on rough surfaces, minimize the sliding of the probe on such surfaces. If the probe is severely worn, it should be replaced promptly. 
6. When the instrument operates for an extended period, it is recommended to conduct a reference calibration to mitigate the influence of the external environment on the instrument. 
7. When the instrument displays "Low battery", the battery should be replaced with a new one. 
8. After using the instrument, clean the probe and the standard test block to prevent corrosion of both the probe and the standard test block.