Compared with other flow meters, the maintenance of ultrasonic flowmeters is relatively small. For the externally attached transducer ultrasonic flowmeter, there is no water pressure loss and no potential water leakage after installation. Just check whether the transducer is loose and whether the adhesive between the pipe is good. Insert ultrasonic flowmeter, to regularly clean up the impurities deposited on the probe, scale and other water leakage phenomenon; In the case of an integrated ultrasonic flowmeter, check that the flange connection between the flowmeter and the pipe is good, and consider the effect of field temperature and humidity on its electronic components. Regular maintenance can ensure the long-term stable operation of ultrasonic flowmeter.