Tanks definitions

Question 1

Level

Answer 1

The height of a liquid surface in reference to a zero point (zero reference point could be anywhere in the tank)

Question 2

Ullage (outage)

Answer 2

Measurement from the surface of the product to the top of the tank,

Question 3

Inage

Answer 3

the measurement from the bottom of the tank to the surface of the product

Question 4

Direct measurement

Answer 4

Measures the process variable directly in terms of itself (the level)

Question 5

Interface level

Answer 5

A plane where two materials meet: can be between two substances, a liquid and a slurry, or a liquid and foam.

Question 6

Indirect Measurement

Answer 6

Measures another process variable (such as head pressure or weight) in order to infer level. Converts the weight into level

Question 7

Meniscus

Answer 7

The curved upper surface of a column of substance. It can have a convex shape or a concave shape

Question 8

Hydrostatic head pressure

Answer 8

The pressure exerted by a column height of liquid

Question 9

Depth

Answer 9

A distance from the surface of a liquid that extends downward

Question 10

Height

Answer 10

A distance from a zero reference point to the surface