The Type 550X is an electronic pressure regulator that converts a variable signal (current or voltage) to a proportional pneumatic output. Its compact housing, accessible ports and easy adjustments provide an ideal answer to applications that are space-constrained. This economical instrument provides precision air pressure regulation to actuators,valves, positioners and other final control elements. An integral volume booster provides high flow capacity,increasing control speed in critical applications. Compact Size Great for high density mounting Easy Wiring Conduit, terminal block or DIN 43650 connections Multiple Mounting Options Wall, panel, DIN rail, pipe or manifold mounted Input/Output Ports on Front and Back Provides flexible pneumatic connections External Zero and Span Adjustments Convenient field calibration RoHS All versions of the T550X comply with the RoHS directive Intrinsic Safety Approvals Factory Mutual (FM) (4-20mA units only) Canadian Standards Assoc.(CSA) ATEX option available