The Rosemount 4088, developed by Emerson Automation Solutions, is a sophisticated and highly advanced multivariable transmitter designed to provide a comprehensive suite of process measurements from a single, compact instrument. It represents a significant evolution beyond traditional single-variable pressure transmitters by integrating multiple sensor technologies into one robust device, thereby streamlining installation, reducing overall system cost, and enhancing process insight.
At its core, the Rosemount 4088 is engineered to measure three critical process variables simultaneously: differential pressure (DP), static pressure (SP), and process temperature (T). By harnessing these three primary measurements, the transmitter's powerful internal microprocessor can calculate and output a fourth, vital variable: mass flow or volumetric flow. This integrated flow calculation capability is its most defining feature, making it an ideal solution for gas, steam, and liquid flow applications without the need for separate flow computers or complex calculations in the control system. This is achieved through the application of industry-standard equations, such as those found in AGA Report No. 3 for liquids and AGA Report No. 7/ISO 5167 for orifice plates.
The heart of the 4088's performance lies in its advanced, co-planar sensor platform. This design places the differential pressure and static pressure sensors in the same plane, significantly reducing the effects of static pressure and temperature variations on the critical DP measurement. This results in exceptional long-term stability and measurement accuracy, often as high as ±0.04% of reading for differential pressure. The integrated RTD (Resistance Temperature Detector) accurately monitors the process temperature directly at the measurement point, which is crucial for precise temperature compensation and flow computation.
A key advantage of the Rosemount 4088 is its ability to drastically reduce the total cost of ownership. By replacing the traditional assembly of separate DP, SP, and temperature transmitters—along with their associated mounting hardware, impulse tubing, manifolds, and wiring—the 4088 simplifies the entire installation process. This consolidation minimizes potential leak points (a major safety concern, especially with hazardous fluids), cuts installation material and labor costs by up to half, and reduces the physical footprint in the field.
The transmitter is housed in a rugged, lightweight aluminum or stainless-steel enclosure rated for NEMA 4X / IP66, ensuring reliable operation in harsh and demanding environments. It features a large, backlit liquid crystal display (LCD) that can be configured to show any of the measured or calculated variables, diagnostic information, or custom text messages. For user interaction, it employs an intuitive local operator interface (LOI) with pushbuttons, allowing for safe and secure configuration without opening the electronics compartment.
In terms of communication, the 4088 is a versatile device. It supports the industry-standard 4-20 mA analog output with HART protocol, which allows it to transmit the primary variable (e.g., DP) on the analog loop while using the digital HART signal to access all other measured and calculated variables (SP, T, flow) and diagnostic data. Furthermore, it is available in models that support FOUNDATION Fieldbus and Profibus PA digital protocols, enabling truly digital integration into modern plant architectures and allowing multiple variables to be transmitted over a single cable, further reducing wiring costs.
| Category | Details |
|---|---|
| Product Name | Emerson Rosemount 4088 Multivariable Pressure Transmitter |
| Core Function | Simultaneous measurement of Differential Pressure (DP), Static Pressure (SP), and Temperature (T); calculates Mass Flow or Volumetric Flow using standard equations (AGA 3, AGA 7, ISO 5167) |
| Sensor Platform | Advanced co-planar design:- DP and SP sensors aligned on same plane → minimizes static pressure & temperature effects- Integrated RTD for accurate process temperature measurement & compensation |
| Key Advantage | Integrated multi-variable capability replaces multiple transmitters & flow computers:- Cuts hardware, impulse tubing, manifolds, and wiring- Reduces leak points → improved safety- Cuts installation and labor costs up to 50% |
| Performance | - DP accuracy: up to ±0.04% of reading- High stability & long-term reliability- Direct, precise temperature compensation for flow |
| Housing & Protection | - Material: Aluminum or Stainless Steel- Rating: NEMA 4X / IP66- Rugged, lightweight, designed for harsh environments |
| Display & User Interface | - Large, backlit LCD display- Shows measured/calculated variables & diagnostics- Local Operator Interface (LOI) with pushbuttons for safe, secure field configuration |
| Communication | - 4–20 mA + HART (analog + digital)- Digital protocols: FOUNDATION Fieldbus & Profibus PA- Supports multiple variable transmission over single cable- Remote configuration, diagnostics, predictive maintenance |
| Cost/Ownership Benefits | - One device replaces multiple instruments- Fewer components & connections → reduced footprint- Lower total cost of ownership (CAPEX & OPEX) |
| Typical Applications | - Steam Flow (saturated/superheated)- Natural Gas Flow (custody transfer, fiscal metering)- Liquid Hydrocarbon Flow (pipelines, transfer)- Air & Gas Flow in HVAC (energy optimization)- General Process Flow (with orifice, venturi, flow nozzle) |
| Overall Summary | More than a pressure transmitter → an intelligent flow computer in a proven transmitter body. Provides multiple validated measurements, advanced diagnostics, robust communication, and reduced costs for industries like power, oil & gas, refining, chemical, and utilities. |
Typical applications where the Rosemount 4088 excels include:
In summary, the Rosemount 4088 is more than just a pressure transmitter; it is a powerful and intelligent flow computer integrated into a field-proven transmitter body. Its ability to provide multiple validated measurements from a single point, combined with its robust construction, advanced diagnostics, and support for major communication protocols, makes it an indispensable tool for improving measurement accuracy, enhancing process efficiency, and lowering capital and operational expenses in a wide range of industries.
Please contact Sean at 13032169980
Company website: https://shanghaixiangjing.gys.cn/company-information.html
