The important questions to be asked while selecting a level instrument

1. THE Art of Level Instrument Selection
PRESENTED BY:
ANISH DAS

2. General Review:
 1. Common reasons for measuring level
 Inventory, Custody transfer, Efficiency, Safety, Consistent Supply
 2. Units of measurement
 3. Important terminologies
 Interface, Density, Specific gravity, Mass, Volume, Transmitter Datum
 4. Device Characteristics
 Continuous vs Single point, Bottom up vs Top down, Direct vs Indirect, Indication vs
Control, Contacting vs Non contacting
 5. Level Technologies
 Manual/Mechanical, Electromechanical, Electronic Contacting, Electronic Non-
Contacting
 6. Device Selection

3. Level Technologies:

4. Determination of the right technology:
 1. How does each type of level technology actually
work?
 2. In what conditions must the instrument perform?
 3. What is the required accuracy and repeatability of
the level reading?
 4. Can the vessel be taken out of service for
maintenance, and is there any way to independently
verify the level for calibration?
 5. What are the details of the vessel itself?

5. Table: Level Measurement Classification

6. Important points to be considered:
 1. For what purpose is the level measurement
needed?
 2. What are the product characteristics?
 3. What are the instrument requirements?
 4. What is the total cost of the device?

7. Thank you