Patent ID: 8544344

Claim:
An ultrasonic type flow sensor comprising: a tubular main body through which a fluid whose velocity is to be measured is flown, and first and second ultrasonic signal transmission and reception elements arranged at an upstream position and a downstream position, respectively of the tubular main body viewed in a flowing direction of the fluid such that first and second ultrasonic beams emitted from said first and second ultrasonic signal transmission and reception elements toward an inside of the tubular main body are received by said second and first ultrasonic signal transmission and reception elements, respectively and a difference in a propagation time period between the first and second ultrasonic beams propagating between the first and second ultrasonic signal transmission and reception elements is a measure of a velocity of the fluid flowing through the tubular main body, wherein each of said first and second ultrasonic signal transmission and reception elements comprises first and second electrodes provided at such positions that when said tubular main body is secured to an electrical circuit device for processing signals to be supplied to and from said first and second ultrasonic signal transmission and reception elements, said first and second electrodes are coupled with corresponding first and second contact members provided on the electrical circuit device.