Which is the cheapest device for measuring flow rate?
2019-06-14
Orificemeter is the cheapest available device for measuring flow rate.
When a flow nozzle is placed in a pipe carrying whose rate of flow is to be measured, the flow nozzle causes a pressure drop which varies with the flow rate. This pressure drop is measured using a differential pressure sensor and when calibrated this pressure becomes a measure of flow rate.
Applications of Flow Nozzle
It is used to measure flow rates of the liquid discharged into the atmosphere.
It is usually used in situation where suspended solids have the property of settling.
Is widely used for high pressure and temperature steam flows.
Advantages of flow Nozzle
Installation is easy and is cheaper when compared to venturi meter
It is very compact
Has high coefficient of discharge.
Limitations
Pressure recovery is low
Maintenance is high
Installation is difficult when compared to orifice flow meter.