3051CD with exclusive serial number 5908765 is Emerson Rosemount coplanar differential pressure transmitter adopting proprietary coplanar modular design, specially developed for differential pressure measurement. It is widely applied in petrochemical, thermal power and oil & gas fields for flow calculation cooperating with orifice and annubar flow elements, closed tank hydrostatic level measurement and pipeline differential pressure monitoring.

High precision capacitive sensing core converts differential pressure into standard electrical signals with digital communication function. Its coplanar structure enables direct assembly with three-valve or five-valve manifolds without transitional adapters, simplifying field impulse piping layout and cutting leakage risks effectively. Built-in intelligent diagnostic circuit keeps detecting blocked impulse tubing and circuit abnormalities to reduce unexpected maintenance and unplanned shutdown loss. Every unit finishes factory calibration and pressure test for quick on-site startup after installation.

Reference accuracy can reach ±0.04% of full calibrated span, and total installed performance is within ±0.15% full scale. Maximum adjustable turndown ratio is 150:1 for flexible on-site range modification without hardware replacement, and five-year long-term stability is controlled within ±0.125% of calibrated span under continuous operation.

Standard output is 4–20mA analog signal overlaid with HART7 digital communication, supporting remote parameter configuration via handheld communicator or DeltaV DCS system. Optional communication options include FOUNDATION Fieldbus H1, PROFIBUS PA and WirelessHART as customized orders required. The loop-powered HART model works with supply voltage between 10.5VDC and 42.4VDC.

Default wetted parts including isolating diaphragms and coplanar flanges are made of 316L stainless steel. Alternative anti-corrosion materials like Hastelloy C-276, Monel alloy and tantalum are available for corrosive medium and NACE sour service working conditions. The transmitter outer housing is cast aluminum with anti-corrosion epoxy coating, and silicone oil is standard internal sensor filling fluid for regular process medium.

Operating and storage ambient temperature both range from -40℃ to +85℃; working relative humidity is 5%~95% under non-condensing environment. With standard silicone fill fluid, applicable process medium temperature covers -40℃ to +120℃.

Optional backlit local LCD supports on-site real-time data reading as well as zero and span trimming. Integrated push buttons allow field calibration without extra auxiliary tools. Advanced onboard diagnostics contain blocked impulse line detection, power loop monitoring and abnormal process early warning.

This transmitter complies with IEC61508 to get SIL2/SIL3 functional safety certification, together with ATEX and FM explosion-proof certificates for hazardous area installation, covered by Emerson five-year limited factory warranty.

Main applications include differential flow measurement of industrial pipelines, closed storage tank liquid level testing via hydrostatic differential pressure, differential pressure monitoring on power plant boiler piping and chemical reactor auxiliary loops.