P70, P72, and P170 controls for dual pressure commercial refrigeration and air conditioning applications are designed for use as combination high and low pressure controls. They respond directly to system pressure changes on both high and low sides, and can provide single-device control of the compressor. P70S and P170S models offer independent high and low pressure switches.
P78 Series Pressure Controls are precision-engineered for dual pressure applications. The single-pole, double-throw switch lets you install alarms or other control circuits. Use with common refrigerants as well as air, water, and other non-corrosive fluids. Customize to your application with automatic and manual reset and numerous connection options.