Emerson’s Rosemount 1151 Smart Pressure Transmitter, model 1151dp5s12b1m4df, is a differential-pressure transmitter that converts process pressure difference into a 4–20 mA signal with HART digital communication for integration with control systems. It supports a 0 to 19,050 mm water column (mmwc) range and uses 1/2 in process ports, powered from 24 V DC with a minimum loop resistance of 250 Ω. The 1151 family is discontinued by Emerson (obsolete), so copies are typically available only as refurbished units or through remaining stock, with standard 4–20 mA wiring and connection diagrams documented in the series manuals.
