Measuring air flow in an HVAC duct can be a tricky ... like with this ultrasonic flow meter, could be a big deal for DIY projects and the trades in general. The principle behind the sensor ...

A compact, low cost solution, the ST75 Flow Meter Series offers the advantages of direct mass flow measurement of air and gases ... Standards for test lab quality systems). FCI solves flow ...

This was the case for [Rob] and his Porsche 944, which had relied on an old-fashioned mechanical air flow meter (AFM). He decided to replace this with a modern mass air flow (MAF) sensor instead ...

In our lab tests ... This is based on the difference in air flow between high and low fan speeds. Noise (high speed): How noisy the fan is, based on a sound meter measurement of air, blade ...