Vacuum switch, electro-mechanical, adjustable with screw and knob
Water Pump Automatical Mechanical Pressure Control Switch - China Pressure Controller Switch, Electronic Adjustable Pressure Control | Made-in-China.com
Mechanical vacuum switch - 0150 - SUCO Robert Scheuffele GmbH & Co. KG - IP65 / for harsh environments
Mechanical pressure and vacuum switch - 9016 series - Telemecanique Sensors
Vacuum switch, inductive universal, adjustable with knob Ø6