Process variable measurement indicator
Flow: Defined as volume per unit of time at specified temperature and pressure Conditions, is generally measured by positive-displacement or rate meters.
Units: kg / hr, litter / min, gallon / min, m3 / hr, Nm3 / hr. (gases)
Pressure: Force acting per unit Area. P = F/A
Units : bar, Pascal, kg / cm2,
lb / in2.
Level: Different between two
heights.
Units: Meters, mm, cm, inches ,
percentage.
Temperature: It is the degree of hotness
or coldness of a body.
Units : Degree Centigrade, Degree Fahrenheit, Degree
Kelvin, Degree Rankin.
Quality: It deals with analysis.
(PH, % CO2, % 02, Conductivity, Viscosity)