Ultrasonic Thickness Gauge is an intelligent handheld product, which adopts ultrasonic measuring principle, and is controlled by micro processor, provides quick and precise measurement of thickness for most of industrial material. This instrument is suitable for measuring materials that are good ultrasonic conductor such as metal, plastic, ceramic, glass etc.Features:1. Auto calibration to assure the accuracy2. Sound velocity measurement: with a given thickness to measure the sound velocity to improve accuracy3.12 sound velocities for different material4. Coupling status indication5. 12 thickness measurement data store and recall6. Thickness alarm setup7. Back light function8. Low battery indication9. Auto power offSpecification:Brand: SMART SENSORModel: AR860 Transducer: dia 6 mm 5MHZ / dia 10mm 5MHZMeasurement Range: 1.0-300.0mm (Steel)Accuracy: (1%H0.1mm)Sound velocity:1000~9999m/sMinimum limit for tube measuring: dia 15*2mm(steel)(dia 6) / dia 20*3mm(steel)(dia 10)Thickness data storage: 12 groupsSound Velocity Measuring & Storage: 12 groupsPower supply: 3 x 1.5V AAA battery (NOT included)Size: Approx. 270 x 180 x 80mm / 10.63 x 7.09 x 3.15inPackage Weight: 1004g (approx.)Package List:1 x Ultrasonic Thickness Gauge1 x User Manual1 x Storage Box1 x Calibration Block2 x ProbesNote:Please note that the product does not come with couplant..