Feature: 1. Ultrasound Probe: Using ultrasonic dual element probe, with high sensitivity, can effectively reduce clutter, the probe shell is made of stainless steel, sturdy and durable. 2. Timing Chip: Equipped with a professional timing chip, it can accurately calculate the propagation time of the ultrasonic pulse in the tested material. 3. Automatic Operation: Automatically switch the gain and adjust the signal amplification, and can automatically select the appropriate gain according to the material type and thickness. 4. 9 Sets Data Records: Can automatically record 9 sets of test data, and you can view the maximum value, minimum value and average value, which is efficient and reliable. 5. 2 Measurement Modes: In the QC mode, the instrument can automatically judge the thickness of the material to be tested. In the statistics mode, the instrument automatically counts the latest 9 sets of data. 6. Wide Application: Widely used for thickness measurement of ship hulls, piping, pressure vessels and structural steel to help determine if they need repair or replacement. Specification: Item Type: Ultrasonic Thickness Gauge Material: ABS, stainless steel, aluminum Measuring Range: Approx. 0.8-350mm / 0.03-13.8in Measured Value: 10-100mm: 0.01mm, 100-350mm: 0.1mm Accuracy: 0.8-10mm: ±0.05mm, 10-350mm: ±0.5% reading Sound Speed Range: 1000-9999m/s Probe: 5MHz dual element probe Display: 240 x 160 dot array LCD Unit: Mm and inch Power Supply: 2 x 1.5V AAA alkaline battery (battery not included) Host Size: Approx. 142 x 72 x 28mm / 5.6 x 2.8 x 1.1in Operating Temperature Range: -10-60℃, 0-85%RH (non condensing) Storage Temperature Range: -10-60℃, 0-85%RH (non condensing) . Package List: 1 x Thickness Gauge1 x Couplant1 x Test Head1 x User Manual Note: Avoid irreversible damage caused by strong bumps and affect the measurement accuracy.