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Instrumentation Design Question For You

Float-type Level Switch to Control a pump

Sketch the necessary wiring to make this float-type level switch control a pump and a lamp in the following manner:

  • High liquid level: pump on and lamp off
  • Low liquid level: pump off and lamp on

float-type level switch control a pump

Hint: remember that the “normal” status of a switch is defined as the status of minimum stimulus: when the switch is exposed to the lowest possible degree of process stimulation (in this particular case, to the lowest possible level).

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float-type level switch control a pump wiring

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Credits : by Tony R. Kuphaldt – under CC BY 1.0

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