The switch is activated when pressure, vacuum, or differential pressure acts on the diaphragm, which in turn activates a snap switch that is totally isolated from the pressure or vacuum media. The differential pressure switch is capable of acting without delay and displacing little air as there is minimal air volume inside the unit.
The activation point can be adjusted and increased by adjustment nut that should be turned clockwise.
These differential pressure switches feature a rugged flat plate construction that has a unique square diaphragm, and they can also be supplied with gold contacts for use with low DC voltage and minimum current.
DIETZ Model D1 differential pressure switches are suitable for use in numerous applications including forced air cooled electronic equipment, radar domes, filters, blowers, exhaust fans, granular material level indication and control.
D1 differential pressure switches are also available with moisture and fungus resistant treatment.