Level measurement

84 Continuous level measurement in liquids

4. Instrument selection within the measuring principle

Servo (tank gauging)

Servo – Tank Gauging

Required application data • Pressure and temperature • Medium density • Required material compatibility

• Nozzle diameter • Measuring range • Required accuracy • For stilling well: Internal pipe diameter

Technical data • Process pressure • Process temperature • Accuracy • Process connection • Wetted parts • Measuring ranges

Application limits for servo level measurement

• • • • • Viscosity from 5000mPS s

• Gastight feedthrough • Technical Information Applications Horizontal storage tank cyl. Vertical storage tank Buffer tank Recipient tank Process tank Stilling well Bypass Pump shaft Channel measurement Application limits

C

Advantages • Unaffected by dielectric constant • Unaffected by conductivity • Multiparameter measurement: Level, density, interface

For reliable measurement

Use a stilling well whenever possible.