3051CG with exclusive serial number 4800966 is Emerson Rosemount coplanar gauge pressure transmitter based on patented coplanar modular construction, dedicated for process gauge pressure measurement. Widely deployed in petrochemical, thermal power and oil & gas industries, it continuously monitors pipeline positive pressure, vessel working pressure and equipment operating pressure for production process control.

High-precision capacitive sensing module converts on-site gauge pressure into standard electrical output with digital communication capability. The coplanar design supports direct assembly with three-valve manifold without extra transition fittings, simplifying field impulse piping arrangement and lowering fluid leakage probability. Built-in intelligent diagnostic circuit automatically detects impulse line plugging and circuit loop faults to reduce unplanned maintenance and unexpected plant downtime. Every unit undergoes factory calibration and pressure aging test to realize quick commissioning after field installation.

Reference accuracy reaches up to ±0.04% of full calibrated span, while total installed performance is controlled within ±0.15% full scale. Maximum adjustable turndown ratio hits 150:1 for flexible on-site range modification without hardware replacement, and five-year long-term stability is kept within ±0.125% of calibrated measuring span under continuous running status.

Standard signal output is 4–20mA DC analog signal overlaid with HART7 digital protocol, supporting remote parameter configuration via handheld communicator or DeltaV DCS control system. Optional communication modes include FOUNDATION Fieldbus H1, PROFIBUS PA and WirelessHART as per customized order. The conventional loop-powered HART transmitter works with supply voltage ranging from 10.5VDC to 42.4VDC.

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

Ambient operating and storage temperature both range from -40℃ to +85℃; applicable relative humidity is between 5% and 95% under non-condensing surroundings. With standard silicone fill fluid, allowable process medium temperature covers -40℃ ~ +120℃.

Optional backlit local LCD supports on-site real-time process value reading as well as zero and span trimming operation. Integrated body push buttons enable field calibration without additional auxiliary instruments. Advanced onboard diagnostic functions contain blocked impulse line detection, power loop integrity monitoring and abnormal process fluctuation early warning.

This gauge pressure transmitter obtains SIL2/SIL3 functional safety certification compliant with IEC61508 standard, plus ATEX and FM explosion-proof approvals for installation in classified hazardous areas, covered by Emerson five-year limited factory warranty.

Main applications cover real-time gauge pressure monitoring of industrial liquid and gas pipelines, pressure supervision of chemical reactors and storage vessels, boiler accessory pipeline pressure measurement for thermal power plants and pressure inspection of natural gas transmission equipment.