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CHAPTER 6 FLOW MEASUREMENT & MEASUREMENT OF LIQUID LEVEL - Coggle…
CHAPTER 6
FLOW MEASUREMENT & MEASUREMENT OF LIQUID LEVEL
Flow measurement
A technique used in any process requiring the transport of a material from one point to another.
Flow measuring devices categories.
a. Primary devices (quantity meter)
Measure the amount of fluid in terms of mass or volume that flows past a given point in a definite period of time.
The time required to collect a particular amount of fluid is determined accurately and the average flow rate can be evaluated
Commonly used device
Nutating Disc Meter
application: domestic water
system.
Sliding-Vane-Type Meter
application: dispensing
petrol/diesel in the fuel filling station.
Lobed-impeller Meter.
application: metering of gas and refined petroleum products
b. Secondary devices (rate meter
This type of measurement instrument, they not measure the flow directly but instead measure another physical quantity which related to flow.
Variable head meter.
Pitot Tube
Commonly used variable head velocity measuring device.
Better know as the air-speed indicator used in aircrafts.
