Product Description WT100A Digital Ultrasonic Thickness Gauge Sound Velocity Meter Metal Depth Tester Smart Sensor With LCD Display Note: This product needs to be used with a coupling agent, which requires additional purchase,not include. Features: 1. Auto calibration to assure the accuracy. 2. Make a quick adjustment for the sound velocity 3. Coupling status indication: Observing the coupling icon to learn if the coupling is accomplished or not. 4. Thickness measurement storage 5. Sound velocity measurement. 6. 12 sound velocity for different material which is also adjustable . 7. Thickness alarm setup. 8. LCD backlight display. 9. Low battery indication and auto power off. 10. Limit value function Description: 1. Adopts ultrasonic measuring principle, and is controlled by micro processor. 2. High precision portable,with compact size and light weight is easy to carry and operate. 3. Widely used in measuring materials that are good ultrasonic conductor such as metal, plastic, ceramic, glass etc. Technical parameters:(This lising is 100A) 100A Measuring range 1.00225.0mm Data storage 500 Probe selection Operation frequency 5MHz Measurement error ( 0.5%H+ 0.05) mm Lower limit of pipe measurement 20x3mm (steel) Adjustment range of sound speed 10009999m/s Temperature range of operation 040 Battery 3 Ni-MH rechargeable batteries of 1.2V USB charging 5V 1A Dimensions 65x146x30mm Weight 130G 100A Probe Measurement parameters 5Md10 1.0225.0mm 5Md6 2. 5M High temperature Package Included: 1x WT100A Digital Ultrasonic Thickness Gauge 1x Probe 1x Retail Case 1x Charger 1x Use's Manual "