Instart Instrumentation Course Ch 5 Leve Link -

These methods physically measure the distance from a datum line and are often used for local indication.

Utilize a buoyant object that moves with the liquid surface. Modern versions often use magnets to translate this movement into a signal. Indirect (Inferential) Methods instart instrumentation course ch 5 leve link

Chapter 5 categorizes instruments based on their operating principles, generally dividing them into direct and indirect methods. Direct (Mechanical) Methods These methods physically measure the distance from a