Presair Vacuum Switch

A vacuum switch is a switch that closes when it detects negative pressure on the diaphragm. It is the opposite of a pressure switch.

This is a SPDT switch (a normally open output, normally closed output) and can handle a maximum current of 25A.

Dimensions
Connection: 1/8 inch male thread type MPT (10 mm OD)

Part numbers
Presair: VS12540E-300I