Wednesday, May 23, 2018

IAM Search

What are the Process Variables?

The Process Variables used in instrumentation are:

•    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.

•    Temperature - It is the degree of hotness or coldness of a body. Units: Degree Centigrade, Degree Fahrenheit, Degree Kelvin, Degree Rankine.

•    Level - Different between two heights. Units: Meters, mm, cm, percentage.

•    Quality i. e. % O2, CO2, pH etc. - It deals with analysis.( pH, % CO2, % 02, Conductivity, Viscosity )

Comments (0)Add Comment

Write comment

security code
Write the displayed characters


Related Articles


  • ...more


Important: All images are copyrighted to their respective owners. All content cited is derived from their respective sources.

Contact us for information and your inquiries. IAMechatronics is open to link exchanges.

IAMechatronics Login