Instrumentation : Selection of level instrument


How to select level instrument for measurements .

Type of the content : Liquid / Solid / Slurry / Powder
Continuous Level measurement / Discrete Level Measurement
Operating temperature and pressure
Accuracy of level measurement
Whether the measured medium is electrically conductive or not ?
Can the sensor be in direct contact with the process fluid (Contact Type / Non Contact Type )
Is it possible to penetrate the level sensor to the vessel wall or inside it ?
Condition of process fluid : Turbulence / Foam or Vapor at the surface
Type of Output required : Digital Output - Eg :Level switch
Analog Output - Eg: Radar transmitter
Type of display Remote / Integral