Patent ID: 9671263
Date: 2017-06-06
CPC Classifications: G01F

Claim:
1. An ultrasonic flow switch to output an ON/OFF signal based on a flow rate of a fluid in a pipe, the ultrasonic flow switch comprising: a first ultrasonic wave element configured to transmit an ultrasonic wave to a fluid in a pipe; a second ultrasonic wave element configured to receive the ultrasonic wave from the fluid in the pipe; a calculator configured to calculate a flow rate of the fluid in the pipe based on an output signal from the second ultrasonic wave element; an output part configured to output the ON/OFF signal based on the flow rate calculated by the calculator and a preset flow rate threshold value; an element holder integrally or independently holding the first ultrasonic wave element and the second ultrasonic wave element; a mounting member detachably mounted on an outer surface of the pipe, configured to support the element holder; and a fixing member fixing the element holder to the mounting member, wherein, in a state where the element holder is not fixed by the fixing member, the mounting member is configured to restrict displacement of the element holder in an axial direction of the pipe and in a circumferential direction of the pipe and to allow displacement of the element holder in a radial direction of the pipe.