The ultrasonic flowmeter using the transit-time principle. Measurement accuracy, easy to use, widely used in water supply, sewage treatment, petrochemical, power plants, refrigeration and other industries. When the propagation of the ultrasonic wave velocity in the liquid, the liquid flow will enable the propagation time of the small changes in proportional to the liquid flow rate. 
 Fixed clamp-on ultrasonic flowmeter 
 Low-voltage, multi-pulse ultrasonic transmitter circuit, the measurement accuracy, service life and reliability of a substantial increase; 
 The double-balanced signal differential transmitter and receiver circuits, effectively resist the inverter tower, power lines and other strong sources of interference; 
 5 Road 12 accuracy 4-20mA input; 1 programmable 4-20mA input; two programmable switching outputs; 
 Built-in Quantitative / batch controller; built-in accumulator of the flow of the sun and the moon; built-in electric power on the recorder; built-in data logging.