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

A pump delivers water from a storage tank through a piping system. The flow rate is measured by an electromagnetic sensor, which permits further processing of the measured value by outputting a standardized current signal. A Rota meter indicates the flow rate. The controller used is a state-of-the-art digital industrial controller. The actuator in the control loop is a control valve with electric motor operation. 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.


  • Fundamentals of control engineering
  • Real industrial control engineering components: controllers, transducers, actuators
  • Experimental introduction to control engineering using an example of flow control
  • Construction of the system with components commonly used in industry
  • Digital controller with freely selectable parameters: P, I, D and all combinations


Storage tank: 30L
Centrifugal pump

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

Rota meter: 0…1960L/h
Electromagnetic flow rate sensor: 0…6000L/h
Control valve with electric motor

  • Kvs: 5,7m3/h
  • Stroke: 5mm
  • Characteristic curve equal-percentage
  • Valve-opening position sensor: 0…1000Ω

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. 110kg
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