DESCRIPTION: The ”Metlor” Trainer provides a comprehensive experimental introduction to the fundamentals of control engineering using an example of level control.

A pump delivers water from a storage tank to the transparent level-controlled tank. The liquid level is measured by a pressure transducer installed at the base of the level-controlled tank. The controller used is a state-of-the-art digital industrial controller. The actuator in the control loop is a pneumatically operated control valve with an electro-pneumatic positioner. A ball valve in the outlet line enables defined disturbance variables to be generated. The controlled variable X and the manipulating variable Y are plotted directly on an integrated 2-channel line recorder. Alternatively, the variables can be tapped as analogue signals at lab jacks on the switch cabinet. This enables external recording equipment, such as an oscilloscope or a flatbed plotter, to be connected.

Process control software is optionally available.


  • Experimental introduction to control engineering using an example of level control
  • Construction of the system with components commonly used in industry
  • Digital controller with freely selectable parameters: P, I, D and all combinations
  • Level measurement by pressure sensor


Storage tank: 30L
Centrifugal pump

  • Power consumption: 250W
  • Flow rate: 150L/min
  • Head: 7m
  • Speed: 2800min-1

Level-controlled tank

  • 7L
  • Level: 0…0,6m
    Pressure sensor: 0…100mbar
    Pneumatically operated control valve DN 20
  • Kvs: 4,0m3/h
  • Reference variable: 4…20mA
  • Nominal stroke: 15mm
  • Characteristic curve equal-percentage

Line recorder

  • 2x 4…20mA
  • Feed rate 0…7200mm/h, stepped


  • Process variables X, Y as analogue signals: 4…20mA
  • Power required for operation

230V, 50Hz, 1 phase
230V, 60Hz, 1 phase


  • LxWxH: 1000x700x1750mm

Weight: approx. 120kg

Scroll to Top