Being able to measure ducted airflow cheaply and non-intrusively, like with this ultrasonic flow meter, could be a big deal for DIY projects and the trades in general. The principle behind the ...

Pinwheels are pretty optimized from a design standpoint, and are so cheap and easy to build that putting a pinwheel to work as an ... delved into ultrasonic flow measurement, led him to try ...

The Gasboard-8500FS-X200 has a flow rate in the range of 240 L/minute. The system has been designed to have ultrasonic technology as well as TOF (time of flight) measurement. The system delivers ...