Measurement accuracy: ± 0.5%;

　　It has strong anti-interference performance and different excitation current frequency is selected for different caliber;

　　Power off protection system, password lock function, small signal removal function and self-protection function;

　　It adopts 32-bit embedded microprocessor, which has high speed, high precision and low power consumption;

　　It has automatic calculation function of average flow and is easy to calibrate.