Level Tables Advantages Flashcards

1
Q

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

A

Continuous level devices

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2
Q

Point level devices

A

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

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3
Q

No calibration with medium required

A

Ultrasonic

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4
Q

Non-contact (lowest cost)

A

Ultrasonic

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5
Q

Installation at top

A

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

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6
Q

Very accurate ±0.5 mm (0.02 “)

A

Radar

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7
Q

Very accurate ±0.2mm (0.04”)

A

Guided Wave Radar

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8
Q

No re-setup required

A

Radar & Guided Wave Radar

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9
Q

High temperatures and pressures possible

A

Capacitance Level Measurement

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10
Q

Fast speed of response

A

Capacitance Level Measurement

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11
Q

Established principle

A

Capacitance Level Measurement

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12
Q

Very cost effective

A

Capacitance Level Measurement

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13
Q

Accuracy independent of dielectric constant, density and conductivity

A

Ultrasonic, Radar, Guided Wave Radar

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14
Q

Interface measurement possible

A

Capacitance Level Measurement

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15
Q

When all else fails

A

Radiometric (gamma) Level Measurement

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16
Q

Non-invasive, non-contact measurement

A

Radiometric (gamma) Level Measurement

17
Q

No moving parts

A

Radiometric (gamma) Level Measurement & Conductivity Point Switches

18
Q

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

A

Radiometric (gamma) Level Measurement

19
Q

Simple, no power required

A

Floats

20
Q

Low cost and no field calibration

A

Floats

21
Q

High temperatures (840°-850°F)

A

Floats

22
Q

Low specific gravities

A

Floats

23
Q

Interface point level

A

Floats

24
Q

No field calibration or moving parts

A

Ultrasonic Gap Switches

25
Q

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

A

Ultrasonic Gap Switches

26
Q

Not effected – electrical or physical properties of liquid

A

Ultrasonic Gap Switches

27
Q

High pressure (1500 psig)

A

Ultrasonic Gap Switches

28
Q

Simple to use and well known

A

Thermal Dispersion Switches

29
Q

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

A

Thermal Dispersion Switches

30
Q

Well known and proven

A

Conductivity Point Switches

31
Q

Low cost

A

Conductivity Point Switches

32
Q

Multiple level points (5)

A

Conductivity Point Switches

33
Q

Active measurement with feedback loop (corrosion, abrasion)

A

Vibrating Fork Point Switches

34
Q

Any position for installation

A

Vibrating Fork Point Switches

35
Q

No calibration

A

Vibrating Fork Point Switches

36
Q

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

A

Vibrating Fork Point Switches

37
Q

Independent of foam, bubbles, and solids (buildup)

A

Vibrating Fork Point Switches