The 836T-T251JX40 controller is a pressure controller and sensing device whose main objective is to detect and control pressure levels in equipment or circuits. This specific controller device has been designed and manufactured by Allen-Bradley/Rockwell Automation and included in the 836 Pressure Controls series, specifically in the Style T section. This pressure controller and sensing device comes with 4 circuits on its contact block, which provide a faster performance when detecting pressure levels. Besides detecting pressure levels, this device can perform a tripping action that will interrupt any operations if the pressure level increases or decreases beyond the minimum or maximum limits. The Allen-Bradley/Rockwell Automation 836T-T251JX40 pressure controller and sensing device comes with an operating pressure range of 30 inches of mercury in a vacuum to 35 PSI and a differential pressure range from 2.2 to 7 PSI. These ranges are manually and independently adjustable with screws.

The Allen-Bradley/Rockwell Automation 836 series 836T-T251JX40 pressure controller and sensing device comes with internal copper alloy bellows, which enable it to operate with different fluids in hydraulic systems as long as the fluids are not corrosive. The controller itself and  the enclosure that covers it are not resistant to corrosive liquids, vapors, or gases, and this is why corrosive substances must be avoided. The Allen-Bradley/Rockwell Automation 836T-T251JX40 pressure controller and sensing device does not include a pilot light, but one can be added if required by the application. The controller’s contacts have make and break ratings of 3600 VA and 360 VA respectively for AC operations and make and break ratings of 28 VA and 28 VA respectively for DC operations.