Compare pressure transmitters. If you have questions related to Rosemount Pressure Transmitters, please contact us.
Products
Pressure Transmitters
Gauge Pressure vs. Absolute Pressure
Gauge and absolute pressure transmitters measure static pressure in a process. Gauge pressure measures relative to the atmosphere, while absolute pressure measures relative to a perfect vacuum. Static pressure applications across industries are almost endless, and gauge pressure is the most common measurement type of pressure transmitters.
Differential Pressure
Differential pressure (DP) transmitters measure the pressure difference between two points in a process. Functionally, this means having two connection points which are often referred to as the high-pressure side and the low-pressure side of the transmitter. Differential pressure transmitters are used in a variety of applications and include flow and level applications as inferred measurements.
Differential Pressure Flow
Differential pressure can infer a flow measurement by use of Bernoulli's equation, which describes conservation of energy within fluid dynamics. A differential pressure transmitter is paired with a primary element to develop this relationship. Multivariable transmitters can add static pressure and temperature as additional measurements in one transmitter to compensate the differential pressure to flow equation.
Differential Pressure Level
A common use of differential pressure transmitters is to measure level inside tanks. If the tank is vented to atmosphere, a single gauge transmitter near the base of the tank can relate pressure to level through a known specific gravity of the process fluid. If the tank is instead pressurized, a differential pressure transmitter is needed with connections at the top and bottom of the tank.
Nuclear Pressure Measurement
Nuclear pressure transmitters are specifically designed to support the nuclear industry with qualification to industry safety related standards. Nuclear transmitters can measure in gauge, absolute or differential pressure measurement types, but are limited in the output protocols available to meet safety standards.
Multivariable Measurement Advantages
Enhanced Performance
Multivariable measurement solutions help enhance performance. Features include Ultra for Flow (+/- 0.04% of reading specification) for high accuracy in flow measurement and Callendar-Van Dusen (CVD) sensor matching, which uses CVD constants to increase RTD measurement accuracy up to 70%.
Measurement Configurations
Featuring eight different measurement options, Multivariable solutions are able to meet a wide range of application requirements. These devices can provide singular or a combination of measurements, including differential pressure, static pressure and process temperature available in Coplanar™ and in-line platforms. For reliable and accurate measurements in harsh environments, Multivariable technology also offers the all-welded, hermetic design of the SuperModule™ Sensor.
Installation & Commissioning
Ready-to-install, Multivariable technology provides preconfigured and calibrated devices. Additionally, software packages, such as the Rosemount Engineering Assistant Software offer a simple communication and configuration interface for Rosemount mass flow transmitters. To configure a variety of Rosemount pressure, temperature, level and flow products, Rosemount Transmitter Interface Software is also available.
Fully-Assembled DP Flow
As a fully-assembled differential pressure flow solution, a Multivariable flowmeter features a variety of advantages for flow measurement. Capable of calculating mass flow from the transmitter, this device is delivered pre-configured and pre-ranged for easy installation and commissioning. Factory-assembled and tested, these differential pressure flow devices are also leak-checked before shipment, ensuring reduced leak points for optimal performance.
Communication Protocols
Multivariable transmitters feature communication protocol options that incorporate seamlessly into your existing infrastructure. Wired alternatives include industry-standard HART®, FOUNDATION™ Fieldbus and Modbus® protocols. For a wireless solution, WirelessHART® is a self-organizing network that delivers >99% data reliability and provides access to previously inaccessible areas.
Engineering Assistant Software
Rosemount Engineering Assistant 6 Software is used to configure the Rosemount 3051S MultiVariable Transmitter with HART® protocol for Mass Flow measurements. This PC-based software is for Microsoft® Windows™ operating systems (Windows 11, 10, Servers 2019, 2016).
Rosemount Engineering Assistant 5 Software is used to configure the Rosemount 3051S MultiVariable Transmitter with FOUNDATION™ Fieldbus protocol, as well as the legacy Rosemount 3095 MultiVariable Transmitter with HART and FOUNDATION Fieldbus protocols.
These software packages perform configuration, maintenance and diagnostic functions and are available as a SNAP-ON™ to AMS® or as stand-alone software. Check out these Frequently Asked Questions to learn more.
Pressure Transmitter Comparison
Rosemount 4051S Pressure Transmitter
- 20 year warranty
- 20 year stability
- Up to 0.025% reference accuracy
- Process Intelligence
- Dedicated Plugged Line & Loop Integrity Diagnostic
- Expanded Process Alerts
- Bluetooth® connectivity
- Backlit graphical display
- 4-20 mA HART®
Rosemount 3051S Pressure Transmitter
- 15 year warranty
- 15 year stability
- Up to 0.025% reference accuracy
- Process Intelligence
- Plugged Line & Loop Integrity Diagnostic
- Process Alerts
- Remote display
- 4-20 mA HART®, WirelessHART® protocol, FOUNDATION™ Fieldbus
Rosemount 3051 Pressure Transmitter
- 5 year warranty
- 10 year stability
- Up to 0.04% reference accuracy
- Process Alerts
- Plugged Line & Loop Integrity Diagnostic
- Bluetooth® connectivity
- Backlit graphical display
- 4-20 mA HART®, WirelessHART® protocol, FOUNDATION™ Fieldbus, PROFIBUS®, 1-5 V Low Power HART®
Rosemount 2051 Pressure Transmitter
- Up to 5 year warranty
- Up to 7 year stability
- Up to 0.05% reference accuracy
- Basic diagnostics
- Local Operator Interface
- 4-20 mA HART®, WirelessHART® protocol, FOUNDATION™ Fieldbus, PROFIBUS®, 1-5 V Low Power HART®
Tools
Frequently Asked Questions
If you have additional questions related to Rosemount Pressure Transmitters, please contact us.
A pressure transmitter is a device that measures pressure and converts that measurement into an electrical signal. The electrical signal is often transmitted to a control system, effectively communicating the pressure measurement for control or monitoring purposes.
All pressure transmitters include a pressure sensor that measures the pressure of a process and electronics to output that pressure measurement as an electrical signal. Pressure transmitters can vary in the sensing technology used and the type of electrical output.
Pressure transmitters should be chosen to fit your specific applications. In choosing, you must consider the application requirements for things like measurement type, pressure range, accuracy, material compatibility and mounting considerations. Different pressure transmitters may offer different options for these considerations. Tools like DP Level Sizing & Selection Tool and DP Flow Sizing & Selection Tool can assist with proper transmitter selection.
Pressure transmitters can be categorized by several different ‘type’ categories but the most common is by pressure measurement type. Measurement type refers to what type of pressure measurement is being made, of which the options are absolute pressure (reference to vacuum), gauge or gage pressure (reference to atmosphere) or differential pressure (difference between two process pressures). There are also multivariable measurement type transmitters which can measure more than one of these pressure measurement types as well as additional measurements like temperature.
Pressure transmitters are often specified for specific applications, with factors like pressure range, pressure measurement type, materials of construction and output being key factors to consider. Generally, pressure transmitters that measure gauge pressure, have SST wetted materials, and utilize a 4-20 mA HART output signal are the most common, but there are many different options available to accommodate any application.
Calibrating a pressure transmitter involves applying a known accurate pressure to the transmitter and comparing the transmitter pressure output to that known applied pressure. If the difference between those values is outside of desired tolerance, apply a sensor trim to the transmitter to correct the difference. If the difference is within desired tolerance, no sensor trim is needed, this would be considered a calibration verification.
Pressure transmitters and pressure transducers are very similar devices, but differ in the final electrical signal they output. A pressure transducer converts a pressure sensor measurement into a simple voltage signal, which lacks linearization and temperature compensation. A pressure transmitter goes a step further by compensating, linearizing and amplifying the electrical signal and outputting as common signal types like analog 4-20 mA or digital communication protocols.