Name and discuss three different kinds of instruments that are used for measuring the mass flow rate of substances (mass flowing in unit time). Instruments to measure the volume flow rate of fluids...

Name and discuss three different kinds of instruments that are used for measuring

the mass flow rate of substances (mass flowing in unit time).

Instruments to measure the volume flow rate of fluids (volume flowing in unit time)

can be divided into a number of different types. Explain what these different types

are and briefly discuss how instruments in each class work, using sketches of

instruments as appropriate.