Liquid Level Measurement, Part 1

3.5 2 Reviews SKU: ICLL100CENDuration: 60 Minutes

Many industrial liquids are important to plant operations. Accurate level measurements are an essential part of process control for efficient plant operation. Devices for making liquid level measurements are common throughout industry. You need a basic understanding of liquid level instruments design, how the instruments operate, and how they're maintained. In this course, you will explore a number of different devices used to measure and control liquid levels.

Course Details


Training Time: 60 minutes

Compatibility: Desktop Only

Based on: Industry Standards and Best Practices

Languages: English

Learning Objectives

  • Topic I: Principles of Level Measurement
  • Determine whether the system measures innage or outage (ullage)
  • Determine whether the liquid containers have uniform or nonuniform cross-sections
  • Determine whether the container is open or closed
  • Determine whether the system is a continuous level measurement system or a single-point level detection system
  • Topic II: Simple Level Measuring Instruments
  • Read or compute the indicated level for the following simple level measuring instruments:
  • Dipstick
  • Gauge stick
  • Plumb bob (for innage and outage measurements)
  • Gauge glass
  • Topic III: Floats and Displacers
  • Read the indicated level, determine whether the reading is a true indication of level, and, if it is not, troubleshoot and repair the instrument for the following float-actuated instruments:
  • Float and calibrated rod (or mechanical linkage)
  • Float, tape (or chain), and counterweight
  • Float, cable, and pulley (with/without winder window)
  • Given a level control diagram and a gauge stick, troubleshoot a problem with a sump pump when the pump is controlled by a ball float and a mechanical float switch.
  • List the major parts of a typical torque-tube displacer and explain the function of each part.
  • Topic IV: Magnetic Float Devices
  • Read the indicated level on a magnetic float-actuated device that uses a floating magnet and a follower magnet.
  • Troubleshoot the system, if controls are not actuated at specific levels in the tank, for the following magnetic float-actuated devices:
  • A system that uses reed switches
  • A system that uses a ball float and mercury switches
  • Topic V: Conductance and Capacitance Probes
  • Describe what happens in the control circuit of a conductance probe system when level increases and when level decreases.
  • Be able to safely perform maintenance on the probes for a level measurement system that uses conductance probes.
  • Describe the relationship between capacitance and changes in level in a level measurement system that uses capacitance probes.
  • Topic VI: Sonic and Nuclear Radiation Instruments
  • Describe the use of sound waves in a continuous level measurement system and in a single-point level detection system
  • Describe how radiation is used in a continuous level measurement system and in a single-point level detection system.

Customer Reviews



“It was good, thanks.”

DERRON H. Verified Customer


Great information. Course could use an update.

“Great information. Course could use an update.”

Eric F. Verified Customer

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