proflow vacuum triggered safety switch, hobbs switch, 3 terminal, norm open or norm closed option, adjustable set point 4-8"hg, 1/8 in. npt, each

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  6"hg Will switch on OR off at set point

Set point is adjustable from 4-8hg +-1hg

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