GAOTek surface leeb pocket hardness tester is an advanced lipstick-sized metal hardness tester which incorporates the impact device and controller into one unit. It easily fits in a pocket or your palm. It used the latest dual-coil technology which makes the tester have extraordinary accuracy ±6 HL and good repeatability 6HL. It adopts orientation sensors that will compensate for the measurement errors in different impact directions automatically to ensure theaccurateta, with OLED display screen. Equipped with impact device DC, the Leeb hardness tester is suitable for very confined spaces such as holes, cylinders or for internal measurements on assembled machines. The battery can be charged simply from USB port, also it has a customer re-calibration function.