What is Instrumentation & instrument ?

INSTRUMENTATION: It is the branch of engineering which deals with the measurement, monitoring, display etc. of the various of energy exchanges which take place during process operations. "In short Instrumentation is the study of Instrument."

INSTRUMENT:

Instrument is a device, which is used to measure, monitor, display etc. of a process variable.

 process Variable

The process Variable is:

·         Flow.

·         Pressure.

·         Temperature.

·         Level.

·         Quality i.e. % O₂, CO₂, pH etc.

process Variable and  their unit of measurement. 

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, percentage.

Temperature: It is the degree of hotness or coldness of a body.

Units              : Degree Centigrade, Degree Fahrenheit, Degree Kelvin, Degree Rankine.

Quality: It deals with analysis. (pH, % CO₂, % 0₂, Conductivity, Viscosity)