The SMD is a sensitive air differentiator that is compact, easy to install, accurate and reliable. Made of sheet metal, this switch monitors positive, vacuum or differential air pressure.

  • Sensitive diaphragm
  • Snap-action electrical switch, S.P.D.T. rated at 10 amps
  • Cost-effective pricing
  • Custom design per OEM specifications available

This item is available in the following models:

SwitchModelRangeAdjustableCompression FittingsIndividually Boxed
SMD80212021030.17" to 1" W.C.YesYesNo
SMD80212030900.17" to 6" W.C.YesNoYes
SMD80212060210.17" to 12" W.C.YesYesYes

View Owner’s Manual for all SMD Models | View Spec Sheet for all SMD Models