Flow & Level Control

Flow & Level Control
Flow & Level Control

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The experiments are set up with experiment plates in profile frames. The controlled system or control circuit are activated with the Profi-CASSY and the relevant measurement values recorded.


  • Get familiar with the basic principles of controllers
  • Setpoint and disturbance control
  • Handle analysis and simulation software

The liquid control system is comprised mainly of a pump as well as holding and measuring tanks. The inflow and outflow of liquids can be manipulated using two valves. The device contains an impeller wheel flowmeter with subordinate flow controller. An immersion pipe with pressure sensor records the fill level in the measuring tank and converts it into an electric signal for the fill level. The measured variables for flow rate and fill level are displayed on 7-segment displays. The digital liquid control system is characterized by a very compact build. It is delivered complete with all sensors and operation equipment and needs very few accessories.

The equipment is ideal for demonstration and students' experiments. The tests were carried out with an electronic manual and the data files for CASSY Lab 2 and WinFACT. It is true Plug & Play: The measurement starts automatically after loading the data file.

Target groups
Students completing vocational training in electrical engineering the industry and students of automation engineering and mechatronics are the target group. The course offers introductory experiments that are very simple and also addresses difficult topics for bachelor-level studies.


  • Control design through pole-zero compensation
  • Determination of the controller gain Kp from a batch run
  • Control unit design through numerical optimization
  • Rule of thumb method
  • Digital liquid controlled system
  • Flow measurement
  • Step jump response of the flow system
  • Flow controlling
  • Flow regulation at the stability limit
  • Follow-up control for flow with ZN-optimised controller
  • Disturbance behaviour of flow controlling
  • Flow controlling with block-oriented PC simulation
  • Characteristics of the fill level system
  • Fill level measurement
  • Integral and PT1 behaviour of the fill level system
  • Static identification of the fill level system
  • Software-assisted controller selection
  • Setpoint controlling of the fill level
  • Disturbance control of the fill level
  • Fill level controlling with a two-point controller
  • Fill level controlling with PC simulation

Similar figure

Components of equipment sets

1 734011  4  Two position controller LD
1 73402  8  Reference variable generator LD
1 734064N  8  PID digital controller net LD
1 734265  8  Digital Liquid Controlled System LD
1 524016S2  8  Profi-CASSY Starter 2 LD
1 72609  4  Panel frame T130, two-level LD
1 72686  4  Stabilised power supply unit ±15 V / 3 A LD
2 50059  8  Safety bridging plugs, black, set of 10 LD
1 500592  8  Safety bridging plugs with tap, black, set of 10 LD
3 500641  8  Safety experiment cable, 100 cm, red LD
3 500642  4  Safety experiment cable, 100 cm, blue LD
3 500644  8  Safety experiment cable, 100 cm, black LD
1 775681DE  4  LIT-print: Flow and Level Control, German LD
1 775681EN  4  LIT-print: Flow and Level Control LD
1 775681FR  4  LIT-print: Flow and Level Control, french LD
1 734501  4  WINFACT LD Starter (one computer) LD
1 72610  4  * Panel frame T150, two-level LD
1 734502  4  * WINFACT LD Starter (site license) LD
1 additionally required: 1 PC with Windows 7 / 8.1 / 10 (x86 or x64)
Experiments are operated and evaluated with CASSY Lab 2 and WinFACT.

Articles marked with * are not essential, we do however recommend them to carry out the experiment.

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