Rosemount 2051tg4a Pressure Transmitter for Process Control Applications

• Customization: Available
• Type: Normal Pressure Transmitter
• Structure Type: Strain Gauge Pressure Transmitter
• Model NO.: 2051TG4A
• Measuring Medium: Gas
• Accuracy Grade: ±0.075%
• Pressure range: 0～1.5kPa
• IP Rating: IP66/IP67, NEMA 4X
• Certification: ATEX, Iecex, FM, CSA
• Customized: Non-Customized
• Power Supply: 10.5-55V DC
• Rangedown: up to 200:1
• Measurement Range: up to 10000psi
• Diagnostics: Basic Diagnostics, Loop Integrity, Process Intelli
• Operating Temperature: -40°C to 85°C
• Process Temperature: -40°C to 120°C
• Long-Term Stability: ±0.125% of Url Per 10 Years
• Response Time: ≤90 Ms
• Measurement Type: Gauge Pressure
• Measuring Range: 0~1.2 Kpa to 0~41.37 MPa
• Process Connection: 1/2" NPT Female
• Housing Material: Aluminum Alloy
• Certifications: ATEX, Iecex, FM, CSA, Sil 2
• Accuracy: ±0.075% of Span
• Wetted Materials: 316L Stainless Steel
• Transport Package: with Carton or Wooden Box Package
• Specification: 30X30X30 cm
• Trademark: Rosemount
• Origin: Singapore, China
• HS Code: 9026201090
• Production Capacity: 1000
• Package Size: 30.00cm * 30.00cm * 30.00cm
• Package Gross Weight: 5.000kg

Product Description

Product Description

Rosemount 2051TG4A Pressure Transmitter

Manufactured with strict quality control standards, the Rosemount 2051TG4A is supplied by authorized facilities including Rosemount Beijing Co., Ltd. and Rosemount Singapore Pte. Ltd., ensuring genuine performance and compliance with global industrial specifications. Its compact and lightweight design, coupled with advanced sensing technology and robust construction, makes it a preferred choice for industries such as oil and gas, chemical processing, power generation, and metallurgy. This comprehensive introduction aims to delve into the core principles, technical specifications, application scenarios, performance advantages, and real-world industrial cases of the Rosemount 2051TG4A, providing industrial professionals with a thorough understanding of its capabilities and value proposition.

Pressure Sensing Mechanism

The Rosemount 2051TG4A employs a differential capacitive sensing principle, a proven technology renowned for its stability and accuracy in harsh industrial conditions. When in operation, process pressure from gas, liquid, or steam is transmitted to the transmitter's isolation diaphragms—one on the high-pressure side and one on the low-pressure side. These isolation diaphragms, paired with a specialized fill fluid, act as a barrier between the process medium and the internal sensing element, protecting the delicate components while ensuring efficient pressure transfer.
The fill fluid, typically silicone oil or inert oil, transmits the applied pressure to a central sensing diaphragm—a taut elastic element designed to deflect proportionally to the pressure exerted upon it. The maximum deflection of this sensing diaphragm is a mere 0.004 inches (0.1 millimeters), ensuring minimal wear and tear while maintaining high sensitivity. For gauge pressure measurements, the low-pressure side of the sensing diaphragm is exposed to atmospheric pressure, serving as a reference point. In contrast, absolute pressure configurations maintain a fixed reference pressure on the low-pressure side, enabling precise measurement relative to a vacuum.

Signal Conversion and Transmission:

Accuracy and Stability:

The ASIC amplifier processes the raw capacitance data, converting it into a standardized output signal that is compatible with industrial control systems. The primary output is a 4-20 mA DC current signal, where 4 mA corresponds to the lower range limit (LRL) of the measurement and 20 mA corresponds to the upper range limit (URL). Additionally, the Rosemount 2051TG4A supports digital communication via the HART® (Highway Addressable Remote Transducer) protocol, enabling two-way communication between the transmitter and a HART-compatible hand-held communicator (such as the Rosemount 375 or 475 Field Communicator) or a central control system. This digital interface allows for real-time monitoring, configuration adjustments, and diagnostic data retrieval without interrupting the analog signal transmission.
For wireless-enabled configurations, the transmitter incorporates Wireless HART® technology, which delivers secure and cost-effective data transmission with over 99% reliability. The wireless module utilizes frequency hopping to mitigate interference, ensuring stable communication even in congested industrial environments. 

The Rosemount 2051TG4A sets a high bar for measurement accuracy, with a standard reference accuracy of ±0.075% of span and an optional enhanced accuracy of ±0.065% of span. This level of precision ensures that even minor pressure variations are detected, providing industrial users with the data needed for tight process control. Equally impressive is the transmitter's long-term stability: the standard configuration maintains ±0.10% of span accuracy over 2 years, while the optional extended stability package offers the same performance over 5 years. This eliminates the need for frequent calibrations, reducing maintenance costs and operational downtime—a critical advantage for industries with continuous production requirements.

The transmitter's compact and lightweight design, weighing as little as 2.6 kg, is a result of the ASIC amplifier integration and miniaturized diaphragm housing and flange. This not only reduces installation effort but also minimizes the load on process piping, making it ideal for applications where space is limited or structural constraints exist.

Specification

Model Number	2051TG4A
Measurement Type	Gauge Pressure
Measuring Range	0–1.2 kPa to 0–41.37 MPa (0–0.17 psi to 0–6000 psi)
Accuracy	±0.075% of span
Output Signal	4–20 mA HART® 7
Power Supply	10.5–55 V DC (loop-powered)
Process Temperature	–40°C to +120°C (–40°F to +248°F)
Ambient Temperature	–40°C to +85°C (–40°F to +185°F)
Wetted Materials	316L Stainless Steel (standard)
Process Connection	1/2" NPT female
Housing Material	Aluminum alloy
Protection Rating	IP66 / IP67 / NEMA 4X
Response Time	<90 ms (adjustable damping)
Long-Term Stability	±0.1% of URL per 5 years
Overpressure Limit	1.5× URL
Certifications	ATEX, IECEx, FM, CSA, SIL 2
Communication Protocol	HART® 7

Company Profile

Company introduction

Main product

KeRui (weifang) Automation Equipment Co., Ltd.specializes in industrial automation instrument development, production and sales, technical services, and supportingequipment supply of specialized companies. The main products are flow meters, level meters, temperature meters,pressure meters, electrical meters, thermal intelligent meters, programmable controllers (PLC)DCS distributed control systems,and eight series of more than 1,000 specifications. Its products and technologies are widely used in electric power, metallurgy, petrochemicals, environmental protection, plastics, food, printing, tobacco,textile, dyeing, and other felds.

Valve Positioner: A valve positioner is a crucial control device that precisely regulates the position of control valves in industrial processes. It receives control signals from a controller and compares them with the actual valve position.

Flowmeter: A flowmeter is an instrument designed to measure the flow rate of liquids, gases, or steam within a pipeline or channel. 

Transmitter: A  transmitter is a device that senses a physical parameter, like pressure, temperature, or level, and converts it into a standardized output signal, usually 4 - 20 mA DC or digital signals. 

Certifications

Packing & Delivery

FAQ

Q1: How long will it take you to give me the reply?
A: We will reply to you as soon as we see the information
Q2: What is the delivery time?
A: Our delivery time is within 3- 7 days after we get your payment; for large qty mass orders, the time should be confirmed again for you
Q3: How about your package? 
A: Do not worry about the package. We have a lot of experience in packing, and all our packages are wooden case packages.
Q4: How about the payment terms?
A: You can choose T/T.
Q5: Do you provide samples? 
A: Yes, we have materials in stock to help you get the samples as soon as we can.
Q6: What is the MOQ?
A:1PC.
Q7: Can I get a lower price if I order large quantities? 
A: Yes, cheaper prices with larger orders.