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Recent content by ncsJim

  1. N

    VFD for Vacuum

    Old question, but a 4-20mA pressure transducer with 0-14.7 psiv is typical. You might be able to find one with a better range. A loop powered 4-20mA sensor is preferred as it is more resistant interference and can be done with just two wires. Most VFDs will accept a 4-20mA current signal.
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