# Flow measurement

## Quantification of bulk fluid movement / From Wikipedia, the free encyclopedia

#### Dear Wikiwand AI, let's keep it short by simply answering these key questions:

Can you list the top facts and stats about Standard cubic meters per second?

Summarize this article for a 10 year old

SHOW ALL QUESTIONS

**Flow measurement** is the quantification of bulk fluid movement. Flow can be measured using devices called **flowmeters** in various ways. The common types of flowmeters with industrial applications are listed below:

- Obstruction type (differential pressure or variable area)
- Inferential (turbine type)
- Electromagnetic
- Positive-displacement flowmeters, which accumulate a fixed volume of fluid and then count the number of times the volume is filled to measure flow.
- Fluid dynamic (vortex shedding)
- Anemometer
- Ultrasonic flow meter
- Mass flow meter (Coriolis force).

Flow measurement methods other than positive-displacement flowmeters rely on forces produced by the flowing stream as it overcomes a known constriction, to indirectly calculate flow. Flow may be measured by measuring the velocity of fluid over a known area. For very large flows, tracer methods may be used to deduce the flow rate from the change in concentration of a dye or radioisotope.