Flow Meters Comparison

A comparison table of commonly used flow meters based on the viscosity of fluids that they can handle and for which type of fluid they are suitable, working conditions , accuracy , range are given below 

Sr no	Type	Viscous liquid	Slurry	Gas	Output	Pressure loss	Accuracy% full scale	Full range
1	Orifice	Limited	Poor	Good	Square root characteristic	High	±0.5to ±2%	10-3to 5.5×103m3/hr
2	Venturi	Limited	Limited	Good	--do--	Minimal	±0.5to ±3%	1to 5.5×103m3/hr
3	Flow nozzle	Limited	Limited	Good	--do--	Minimal	±0.5to ±3%	1to 5.5×103m3/hr
4	Pitot tube	Poor	Poor	Good	--do--	Poor	±5to ±10%	10 to 104m3/hr
5	Electromagnetic	Good	Good	Good	Linear	Minimal	±2to ±5%	5.5×104 to 4.95×103m3/hr
6	Variable area meter	Limited	Limited	Good	Linear	Average	±0.5%	10-7to 5.5×103m3/hr
7	Positive displacement	Good	Good	Good	Linear	Minimal	±0.5to ±1%	10-5to 5×102 m3/hr
8	Turbine	Limited	poor	Poor	Linear	Minimal	±2to ±5%	05 to 4.95×102m3/hr