Mechanical Pressure Switch Controller Adjusts Piston Type Stainless Steel Diaphragm Water Pump Fire Fluid Vacuum Pressure Oil and Gas 30-400bar - China Pressure Controller Switch, Electronic Adjustable Pressure Control | Made-in-China.com
Type 0119 SUCO-Piston pressure switch, 24 A/F, with integrated plug
HAWE DG 1 R SPRING LOADED PISTON TYPE PRESSURE SWITCH - Platinum International