4-20mA HART Output In-Line Pressure Transmitter 3051 Transmitter for Conduit Entry Size -25 to 25 inH2O / 0.5 inH2O
The 3051 In-Line Pressure Transmitter delivers high-accuracy differential and static pressure measurement with a compact, rugged design. Featuring a 4–20mA HART output, it ensures seamless integration into modern control systems while providing reliable performance in demanding industrial environments. With a measurement range of -25 to 25 inH₂O and a fine resolution of 0.5 inH₂O, this transmitter is ideal for precise monitoring of flow, level, and pressure in pipelines, tanks, and process equipment. Engineered for durability and long-term stability, the 3051 series is trusted worldwide for its precision, reliability, and ease of installation.
| Parameter |
Rosemount 3051 |
Yokogawa EJA530E |
Azbil AVP302 |
ABB 266DSH |
Siemens SITRANS P DSIII |
| Output Signal |
4–20 mA + HART |
4–20 mA + HART |
4–20 mA + HART |
4–20 mA + HART |
4–20 mA + HART |
| Measuring Range |
-25 to +25 inH₂O (0.5 inH₂O resolution) |
-10 to +10 kPa |
-13 to +13 kPa |
±25 inH₂O to higher DP ranges |
±25 inH₂O to 40 bar |
| Accuracy |
±0.075% of span |
±0.055% of span |
±0.065% of span |
±0.04% of span |
±0.075% of span |
| Protocols Supported |
HART, Foundation Fieldbus, Profibus |
HART, Fieldbus, Profibus |
HART |
HART, Fieldbus, Profibus |
HART, Profibus PA, Foundation Fieldbus |
| Key Features |
Compact in-line design, SIL-certified, high stability |
Advanced self-diagnostics, long-term stability |
Lightweight, modular electronics, flameproof option |
SIL2/3 certified, remote seal options |
Extensive diagnostics, modular sensor modules |
Product Selection Table:
| model |
Type of transmitter (choose one) |
CD |
CG |
CA |
| 3051CD 3051CG 3051CA |
Differential pressure transmitter, Gauge pressure transmitter, Absolute pressure transmitter |
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| code |
Pressure range (URL) (choose one)
3051CD type 3051CG type 3051CA type |
CD |
CG |
CA |
| 0 |
Not provided 0-0.167to0-5psia
(0-8.6to0-260mmHga) |
-- |
-- |
-- |
| 1 |
0-0.5to0-25inH20 Not provided 0-0.3to0-30psia
(0-2.07to0-206.8kPa) (0-2.07to0-206.8kPa) |
-- |
-- |
-- |
| 2 |
0-2.5to0-250inH200-2.5to0-250inH200-1.5to0-150psia
(0-0.62to0-62.2kPa)(0-0.62to0-62.2kPa)(0-10.34to0-1034.2kPa) |
-- |
-- |
-- |
| 3 |
0-10to0-1000inH200-10to0-1000inH200-8to0-800psia
(0-2.48to0-248kPa)(0-2.48to0-248kPa)(0-55.16to0-5515.8kPa) |
-- |
-- |
-- |
| 4 |
0-3to0-300 psi 0-3to0-300 psi 0-40to0-4000 psi
(0-20.7to0-2070kPa)(0-20.7to0-2070kPa)(0-275.8to0-27580kPa) |
-- |
-- |
-- |
| 5 |
0-20 to 0-2000 psi 0-200 to 0-2000 psi
(0-138 to 0-13800kPa) (0-138 to 0-13800kPa) |
-- |
-- |
-- |
| code |
output |
CD |
CG |
CA |
A
M(1) |
4-20mA, with a digital signal based on the HART protocol
Low power consumption, 1-5VDC with digital signal based on HART protocol (0.8-3.2Vdc, using option code C2) Not provided |
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Applications:
Rosemount 3051C In-Line Pressure Transmitter – Model Code Table
| Base Model |
Range Code |
Configuration |
Option Codes |
| 3051C G |
1 |
A02A1AB1H2L4M5 |
— |
| 3051C G |
2 |
A02A1AB1H2L4M5 |
— |
| 3051C G |
3 |
A02A1AB1H2L4M5 |
— |
| 3051C G |
4 |
A02A1AB1H2L4M5 |
— |
| 3051C G |
5 |
A02A1AB1H2L4M5 |
— |
| 3051C G |
1–5 |
A02A1AB3H2L4M5 |
— |
| 3051C G |
1–5 |
A02A1AB1H2L4M5 |
K5 / E5 / I5 |
| 3051C G |
1–5 |
A02A1AB3H2L4M5 |
K5 / E5 / I5 |
| 3051C G |
1–5 |
A22A1AB4M5 |
— / DF / K5 / E5 / I5 |
Typical Applications – Rosemount 3051C In-Line Pressure Transmitter
- Flow Measurement Used with primary elements such as orifice plates, venturi tubes, or pitot tubes to calculate flow rates in liquids, gases, and steam.
- Level Measurement Applied in open or closed tanks to measure liquid level by detecting the differential pressure between the liquid column and reference pressure.
- Filter and Strainer Monitoring Detects pressure drop across filters or strainers, enabling predictive maintenance and ensuring process efficiency.
- Pump and Compressor Protection Monitors suction and discharge pressure differences to prevent cavitation, overload, or mechanical damage.
- Pipeline Monitoring provides accurate differential pressure readings for custody transfer, leak detection, and process optimization.
- Energy and Utility Systems are widely used in boiler drum level control, condenser backpressure monitoring, and chilled water system balancing.
Frequently Asked Questions (FAQ)
1. What is the Rosemount 3051C In-Line Pressure Transmitter used for?
The 3051C is designed for differential, gauge, and absolute pressure measurement in applications such as flow, level, and filter monitoring. It is widely used in oil & gas, chemical, power, and water treatment industries.
2. What output signals does it support?
It provides a 4–20 mA analog output with HART protocol, ensuring compatibility with most DCS and PLC systems. Foundation Fieldbus and Profibus options are also available.
3. What is the typical accuracy of the 3051C?
The transmitter offers up to ±0.075% of span accuracy (standard), with high-performance options reaching ±0.04% of span depending on configuration.
4. What pressure ranges are available?
The 3051C series covers a wide range of spans, from low differential pressures (inH₂O / kPa) to higher ranges (bar/psi). Specific range codes (G1–G5) define the measurement span.
5. Can it be used for level measurement?
Yes. By measuring the differential pressure between the liquid column and a reference point, the 3051C can provide accurate tank level measurement in both open and closed vessels.
6. What communication protocols are supported?
Standard: HART, Optional: Foundation Fieldbus, Profibus PA This ensures seamless integration into both legacy and modern digital control systems.
7. What certifications are available?
The 3051C can be ordered with SIL safety certification, explosion-proof/flameproof approvals, and fireproofing options, depending on the selected option codes (e.g., K5, E5, I5).
8. How durable is the transmitter?
It is engineered with stainless steel wetted parts, robust housing, and advanced diagnostics, ensuring long-term stability and reliability even in harsh environments.
9. What are common accessories or options?
- Remote seals for corrosive or high-temperature processes
- Manifolds for easy calibration and isolation
- Mounting brackets for flexible installation
- Option codes (K5, E5, I5, DF) for certifications and special features
10. Why choose the 3051C over other transmitters?
The 3051C combines high accuracy, modular design, global certifications, and proven reliability, making it one of the most trusted transmitters worldwide.
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