The 836T-T252JX40 controller is a pressure controller and measurement device that has been designed and manufactured by Allen-Bradley/Rockwell Automation. This specific controller has been designed to operate in different applications in different industries. These applications include the measurement of high and low pressure, the use of the controller in air compressors, and its use in vacuum transfer systems. The Allen-Bradley/Rockwell Automation 836T-T252JX40 pressure control device comes with 4 circuit channels that enable it to perform a quick detection of pressure abnormalities and to remedy them quickly. This device detects all pressure levels and it reacts when these levels are below or above the range of safe pressure levels. This reaction consists of a trip action that stops operations to protect the equipment installed in the system.

More than one component is involved in the functioning of the Allen-Bradley/Rockwell Automation 836T-T252JX40 pressure control and measurement device. For example, there is a pressure connection part which is the sensitive part of the controller that is in contact with the fluid in a pressure system that uses fluids. Then there is the bellows actuator which is made of copper alloy. Two other important parts of the device are the main spring and the differential blade spring, and these 2 springs are meant to adjust the operational pressure rating and the differential pressure rating, which directly affects the operations of the whole Allen-Bradley/Rockwell Automation 836T-T252JX40 pressure control and measurement device. On top of the controller, there are the contact blocks that perform the trip or interrupting action.