The 836-C5SX221 pressure controller is an Allen-Bradley electromechanical pressure control system from the 836 series. It is used to control and monitor the operating condition for different hydraulic and pneumatic applications. The assembly is housed inside a Type 4X non-metallic enclosure. The unit comes with default factory settings and it comes with adjustable operating and minimum differential setting. It is a Style C device with external copper alloy bellows. It uses a quarter-inch NPTF female pipe connection. This type of bellows can be used with air, water, and other liquids. The 836-C5SX221 pressure controller has a contact rating of 240 Volts with 5 Amps of current and a contact rating of 600 Volts with 3 Amps of current. 

The operating range of the 836-C5SX221 pressure controller is 2 to 80 PSI. The line pressure rating of the unit is 190 PSI maximum, and it supports an occasional surge of up to 210 PSI maximum. The operating temperature should be set between -30 and 66 degrees Celsius for regular operation. The installation environment should be clean and harmful and corrosive gases should be avoided. The 836-C5SX221 pressure controller comprises a rugged steel cylinder and a stainless steel piston assembly that is able to handle different application demands. The pressure control unit comes with a snap action feature that offers a friction free operating mechanism and that supports consistent operation regardless of the mounting position. The front side of the 836-C5SX221 pressure controller has an adjustable operating range screw for the total span within which the contacts can be adjusted to trip and reset.