Proflow's vacuum adjustable safety switches have been designed to, for example, sense when vacuum drops below a specific minimum set point and activates vacuum pump, or wired to activate a water/methanol injection when vacuum drops below the set point. This heavy-duty vacuum switch is made of premium materials to serve as a quality replacement.

Note: Choice of Normally Open or Normally Closed wiring

Factory pre-set to 20"hg. Will switch on OR off at set point

Set point is adjustable from 18-22hg ±3hg

Clockwise raises the set point / Anti-clockwise lowers the set point - Do not touch the rubber cap as this set screw does not apply