Description

The 2051CG3A02A1AH2B2M5D4 is a high-performance gage pressure transmitter from Emerson’s Rosemount 2051C Coplanar™ series, designed to deliver precise pressure measurement with integrated HART communication capability -1. This field device converts process pressure into a 4-20 mA analog signal while simultaneously enabling bidirectional digital communication via the HART protocol -6.

Unlike a standalone communication module, the 2051CG3A02A1AH2B2M5D4 is a complete pressure transmitter assembly that includes sensor electronics, communication circuitry, and a local operator interface in a single rugged housing -2. Its Coplanar platform design allows direct mounting to manifolds or flanges, significantly reducing installation complexity and potential leak points compared to traditional pipe-mounted transmitters.

 

Application Scenarios

A chemical plant in the Jiangsu province was experiencing erratic pressure readings on a critical reactor vessel, causing frequent batch quality issues. The existing pressure transmitter had degraded over time due to process media exposure and lacked diagnostic capabilities. After replacing it with the 2051CG3A02A1AH2B2M5D4, the plant’s DCS immediately began receiving stable, accurate pressure data. The maintenance team used a HART communicator to access the transmitter’s diagnostic data from the control room, identifying a partially blocked impulse line before it could impact production. Within three months, the plant reported a 45% reduction in batch rejection rates and zero unscheduled shutdowns related to pressure measurement. This case demonstrates how the 2051CG3A02A1AH2B2M5D4‘s diagnostic intelligence transforms pressure measurement from passive monitoring to proactive process management.

In a water treatment facility, the 2051CG3A02A1AH2B2M5D4 was installed on a high-pressure pump discharge line. The transmitter’s 316L stainless steel isolation diaphragm and silicon oil fill provided compatibility with the treated water, while the 100:1 turndown ratio allowed the same transmitter to handle both normal flow and emergency surge conditions -1. The built-in LCD indicator (M5 option) allowed operators to read process values locally without opening control cabinets, simplifying routine inspections -1.

 

Parameters

Main Parameters	Value/Description
Product Model	2051CG3A02A1AH2B2M5D4
Manufacturer	Rosemount (Emerson Automation Solutions)
Product Category	Gage Pressure Transmitter with HART Communication
Pressure Range	0 to 689 kPa (0 to 100 psi) – “G3” code designates range
Output Signal	4-20 mA with HART digital communication
Reference Accuracy	±0.05% of span (calibrated span); ±0.075% of URL typical
Turndown Ratio	Up to 100:1 for flexible range adjustment
Isolation Diaphragm	316L stainless steel – A1 option
Fill Fluid	Silicon oil – standard fill
Housing Material	Polyurethane-coated aluminum, 1/2-14 NPT conduit
Indicator	LCD display with 0-100% scale – M5 option
Certifications	FM Explosion-Proof, Intrinsic Safety, Dust Ignition Proof – D4 option
Operating Temperature	-40°C to 85°C (-40°F to 185°F)
Long-term Stability	±0.125% of URL over 5 years typical
Process Connection	Coplanar flange, 316L stainless steel – 02 option