PF220A/220B Transit Portable Type
To start flow measurement, just install the sensor on current pipe.
Simple flow meter without extra function.
Applicable pipe diameter φ13mm～φ1000mm.
Operating Principles
Transit Time Type
Ultrasonic waves are transmitted into a liquid alternately from the 2 sensors attached to the outside of the pipe, and difference between the propagation time of the ultrasonic wave in the upstream direction and the propagation time in the downstream direction is detected to obtain the flow velocity. Then, the flow rate is calculated by multiplying the cross section area of the pipe diameter.
Doppler Type
The sensor transmits ultrasonic into the liquid through the pipe wall. Ultrasonic reflects the granules or air bubbles in the liquid. When the liquid flows, echos come back to the sensor with a different frequency besed on the flow velocity. We can calculate the flow velocity based on the frequency change.