Ordering Information Model 2051C Coplanar Pressure Transmitter Measurement type D Differential Pressure range 2 –250 to 250 inH2O (–623 to 623 mbar) Transmitter output A(1) 4–20 mA with digital signal based on HART Protocol Materials of construction 2 Process flange type: CoplanarFlange material: SSTDrain/vent: SST Isolating diaphragm 2(2)316L SST O-ring A Glass-filled PTFE Sensor fill fluid 1Silicone A Housing material: AluminumConduit entry size: 1/2–14 NPT Product certifications KD(3)USA, Canada, and ATEX Explosion-proof, Intrinsically Safe Calibration certification Q4 Calibration certificate HART Revision 5 is the default HART output. The Rosemount 2051 with Selectable HART can be factory or field configured to HART Revision 7. To order HART Revision 7 factory configured, add option code HR7.Materials of Construction comply with recommendations per NACE MR0175/ISO 15156 for sour oil field production environments. Environmental limits apply to certain materials. Consult latest standard for details. Selected materials also conform to NACE MR0103 for sour refining environments. Order with Q15 or Q25 to receive a NACE certificate.Not available with low power output code M.