The Johnson Controls P70AA-400 is a single-pole, single-throw (SPST) pressure control specifically designed for use in commercial refrigeration and air conditioning systems utilizing R410A refrigerant. This electromechanical device acts as a safety switch, monitoring the pressure within the system. It has an adjustable set point range of 100 to 470 psi. https://www.partshnc.com/100470-36-openlospst-r410a