OEM Mechanical Pressure Switch with Relay or Alarm | Omega
Source MD-S650 12V 24V intelligent digital display adjustable hydraulic pressure switch control for water, air compressor on m.alibaba.com
Dreyoo 40-80 PSI Water Pressure Pump Pressure Switch Assembly for 12V 24V 110V 115V Water Pump, Adjustable Pressure Switch Replacement Kit Compatible with Most Brands of Water Pumps - Amazon.com
20-120 PSI Adjustable Boost Pressure Switch, Hard Line – ProMeth
Amazon.com: Stainless Steel 1/8 Inches Pneumatic Adjustable Pump Pressure Switch QPM11-NO Normally Open : Tools & Home Improvement
1.5-20 PSI Adjustable Boost Pressure Switch, Soft Line – ProMeth