3051CD with unique serial number 4789124 belongs to Emerson Rosemount coplanar differential pressure transmitter series. Designed based on proprietary coplanar modular structure, this model is dedicated to differential pressure measurement, commonly matched with orifice plates, annubar and other throttling components for flow calculation, and also used for closed tank hydrostatic level monitoring and pipeline differential pressure inspection in petrochemical, thermal power, oil & gas industries.

The high-precision capacitive sensor converts differential pressure into standard electrical signals with digital communication function. Coplanar structure allows direct mounting with 3-valve or 5-valve manifolds without extra transition adapters, simplifying impulse piping layout and effectively reducing medium leakage risks. Built-in intelligent diagnostic circuit monitors impulse line blockage and loop circuit faults continuously to lower unplanned maintenance and unexpected production shutdown. Each transmitter completes factory calibration and pressure aging test for direct field commissioning after installation.

Reference accuracy reaches up to ±0.04% full calibrated span; overall installed performance is controlled within ±0.15% full scale. Max adjustable turndown ratio hits 150:1 for flexible onsite range modification without hardware replacement. Five-year long-term stability is maintained within ±0.125% of calibrated measurement span under continuous running condition.

Standard output is 4–20mA analog signal superimposed with HART7 digital protocol, supporting remote parameter configuration via handheld communicator or DeltaV DCS system. Optional communication types include FOUNDATION Fieldbus H1, PROFIBUS PA and WirelessHART per customer order. Conventional loop-powered HART version runs on supply voltage from 10.5VDC to 42.4VDC.

Default wetted components including isolation diaphragm and coplanar flange adopt 316L stainless steel. Optional corrosion-resistant materials such as Hastelloy C-276, Monel alloy and tantalum are available for corrosive medium and NACE sour service environment. Transmitter housing is die-cast aluminum with anti-corrosion epoxy coating; silicone oil serves as standard internal sensor fill fluid for regular working medium.

Ambient operating and storage temperature range from -40℃ to +85℃; applicable relative humidity is 5%~95% without condensation inside equipment. Equipped with standard silicone fill fluid, the allowable process medium temperature covers -40℃ ~ +120℃.

Optional backlit local LCD supports on-site real-time value reading and zero-span trimming. Built-in body push buttons realize field calibration without extra tools. Advanced onboard diagnostics cover blocked impulse line detection, power loop status monitoring and abnormal process early warning.

This differential pressure transmitter obtains SIL2/SIL3 certification complying with IEC61508, as well as ATEX and FM explosion-proof approvals for hazardous area installation, covered by five-year limited factory warranty from Emerson.

Primary uses include differential flow measurement of industrial process pipelines, sealed tank liquid level detection via hydrostatic differential pressure, differential pressure monitoring for boiler auxiliary pipeline and chemical reactor auxiliary loop in power and chemical plants.