Allen-Bradley 836T-T251E Pressure Control Switch

Allen-Bradley 836T-T251E Pressure Control Switch is a Style T electro-mechanical pressure switch from Rockwell Automation that uses a copper alloy bellows sensing element to monitor process pressure and actuate electrical circuits via a DPDT (double-pole, double-throw) contact arrangement. Designed for industrial control, it provides reliable on/off switching of two separate circuits as pressure crosses the setpoint, making it suitable for traditional machine tools and other equipment that require automatic pressure control. The 251E variant is documented with a 35 psi nominal setpoint on the associated 836T cut sheet, with other Style T variants available for different pressure ranges. Electrical compatibility supports connection to control circuits in industrial panels, enabling direct interface with relays or contactors, while the rugged 836T construction supports typical manufacturing environments. In service, this switch offers straightforward field adjustment and precise pressure-based control, delivering predictable operation for pneumatic or hydraulic systems that rely on defined cut-in and cut-out pressures.