High precision probe, long service life, more stable data. The operation panel is simple, and the panel knob operation is simple, convenient and fast. High performance bracket, stable and firm, can be assembled and disassembled, easy to use. The large LCD screen displays double-row digital display, which can display 2 kinds of values at the same time. Automatic temperature compensation (0°-50°), the temperature compensation is not affected by the environment, and the measurement error is automatically eliminated according to the environmental temperature change