Level Tables Advantages

Question 1

used when it is important to control or monitor the material at all points in a tank – 0% to 100%

Answer 1

Continuous level devices

Question 2

Point level devices

Answer 2

usually used when it is important to know the lowest point or highest point

Question 3

No calibration with medium required

Answer 3

Ultrasonic

Question 4

Non-contact (lowest cost)

Answer 4

Ultrasonic

Question 5

Installation at top

Answer 5

Ultrasonic, Radar (non-contact), Guided Wave Radar

Question 6

Very accurate ±0.5 mm (0.02 “)

Answer 6

Radar

Question 7

Very accurate ±0.2mm (0.04”)

Answer 7

Guided Wave Radar

Question 8

No re-setup required

Answer 8

Radar & Guided Wave Radar

Question 9

High temperatures and pressures possible

Answer 9

Capacitance Level Measurement

Question 10

Fast speed of response

Answer 10

Capacitance Level Measurement

Question 11

Established principle

Answer 11

Capacitance Level Measurement

Question 12

Very cost effective

Answer 12

Capacitance Level Measurement

Question 13

Accuracy independent of dielectric constant, density and conductivity

Answer 13

Ultrasonic, Radar, Guided Wave Radar

Question 14

Interface measurement possible

Answer 14

Capacitance Level Measurement

Question 15

When all else fails

Answer 15

Radiometric (gamma) Level Measurement

Question 16

Non-invasive, non-contact measurement

Answer 16

Radiometric (gamma) Level Measurement

Question 17

No moving parts

Answer 17

Radiometric (gamma) Level Measurement & Conductivity Point Switches

Question 18

Very versatile (measure continuous level, point level, density of the media or interface)

Answer 18

Radiometric (gamma) Level Measurement

Question 19

Simple, no power required

Answer 19

Floats

Question 20

Low cost and no field calibration

Answer 20

Floats

Question 21

High temperatures (840°-850°F)

Answer 21

Floats

Question 22

Low specific gravities

Answer 22

Floats

Question 23

Interface point level

Answer 23

Floats

Question 24

No field calibration or moving parts

Answer 24

Ultrasonic Gap Switches

Question 25

Verify/test features (safety purposes – crystal, wiring, and electronics)

Answer 25

Ultrasonic Gap Switches

Question 26

Not effected – electrical or physical properties of liquid

Answer 26

Ultrasonic Gap Switches

Question 27

High pressure (1500 psig)

Answer 27

Ultrasonic Gap Switches

Question 28

Simple to use and well known

Answer 28

Thermal Dispersion Switches

Question 29

Can be used in high temperatures (850°F) and high pressures

Answer 29

Thermal Dispersion Switches

Question 30

Well known and proven

Answer 30

Conductivity Point Switches

Question 31

Low cost

Answer 31

Conductivity Point Switches

Question 32

Multiple level points (5)

Answer 32

Conductivity Point Switches

Question 33

Active measurement with feedback loop (corrosion, abrasion)

Answer 33

Vibrating Fork Point Switches

Question 34

Any position for installation

Answer 34

Vibrating Fork Point Switches

Question 35

No calibration

Answer 35

Vibrating Fork Point Switches

Question 36

Independent of physical and electrical properties (pressure, temperature density, viscosity, conductivity, and dielectric constant)

Answer 36

Vibrating Fork Point Switches

Question 37

Independent of foam, bubbles, and solids (buildup)

Answer 37

Vibrating Fork Point Switches