EET 6 FINAL

Material level in a tank or vessel is a common process variable in plants.

• TRUE

• FALSE

The selection of the right level measurement solution is based on not only the choice of measurement technology but also the application and installation requirements.

• TRUE

• FALSE

(a)   are typically used for high-high or low-low level sensing to prevent plant personnel and/or process equipment from being in harmful conditions.

(a)   sense the tank level as a percent of span of the probes capabilities.

(a)   , as the name implies, requires that the sensing element be in contact with material being measured.

The use of non-contact level sensors eliminates agitator interference.

• TRUE

• FALSE

(a)   is often simple because measuring the level is just a matter of measuring the height of the substance in a vessel.

(a)   of level measurement involves converting readouts and data of a known quantity, such as pressure ratio to the volume.

APPLICATIONS OF ULTRASONIC SENSOR (3)

Answer explanation

Measure the Level of Hot Corrosive

Measuring Level of Boiling Liquids

Measuring Level of Other Solid Objects.

LIMITATIONS OF AN ULTRASONIC SENSOR (4)

Answer explanation

DEPENDS ON THE QUALITY OF THE ECHO

NOT CONVENIENT IF THE TANK DEPTH IS HIGH OR THE ECHO IS ABSORBED OR DISPERSED

UNSUITABLE FOR TANKS WITH TOO MUCH SMOKE OR HIGH-DENSITY MOISTURE TEMPERATURE COMPENSATION IS ESSENTIAL