What is instrument ?

Instrumentation     

Instrument as a device to measure the value of a process variable. It can also indicate and transmits a signal to a remote device,

Instrumentation is the technology of using the instrument to measure and control the physical and chemical properties of a material,

 Transmitter

An indicator is a device with a defined/calibrated scale. Used for local display of a process. A transmitter transmits a signal. It used an external power or air supply and produce a signal proportional to the process value,

Signal

A signal is the generated output of a transmitter indicating the value of process variable. Pneumatic, Electronic signal are commonly used. Also, there is a digital and analog type of signal.

   Calibration

     Calibration is the process of verification of response of an instrument device against the known standards.

5.     

     process variable

 The process variables are

(1) FLOW

(2) PRESSURE

(3) TEMPERATURE

(4) LEVEL

(5) QUALITY

                   %O₂ (Percentage), CO₂, PH.