Cavitation occurs, where the liquid flow narrows and the water pressure drops below vapour pressure. As a result, bubbles full of vapour start to appear. Their later collapse are the cause for making noises and may damage the surface near cavitation. In chosen method we measured the cavitation threshold on the control valve with various piezoelectric sensors and examined the ability to detect the cavitation threshold of an individual sensor. From the results we concluded that cavitation threshold was best measured using the DT1-052K/L sensor. With this sensor we measured the cavitation noise on multiple places in the front and back of control valve.