Rosemount Temperature Transmitter
Product Overview
The Rosemount Temperature Transmitter is an industrial process instrumentation device used to convert signals from RTDs, thermocouples, resistance sensors, or millivolt inputs into a standardized process output for temperature monitoring and control.
Designed for integration with DCS, PLC, process control, and instrumentation systems, Rosemount temperature transmitters are available in different configurations according to the required sensor input, communication protocol, mounting arrangement, display option, and hazardous-area certification.
Depending on the specific Rosemount series and model, available configurations may include single- or dual-sensor inputs, 4 to 20 mA output with HART communication, fieldbus communication, head-mount installation, and DIN-rail mounting.
Because specifications vary by model, the exact transmitter configuration should be confirmed against the required model number, ordering code, sensor type, output, operating conditions, and certification requirements before purchase.
Sensor Input and Measurement
Rosemount temperature transmitters are designed to accept different temperature-sensing inputs depending on the selected model.
RTD Inputs
Compatible RTD configurations may include commonly used resistance temperature detectors such as Pt100 and other supported resistance values. The transmitter converts the sensor resistance into a standardized process signal while applying the appropriate sensor characterization and linearization for the configured RTD type.
Thermocouple Inputs
Selected models support commonly used thermocouple types, including configurations such as Type B, Type E, Type J, Type K, Type N, Type R, Type S, and Type T. The available thermocouple types depend on the exact transmitter model and configuration.
Dual-Sensor Configurations
Selected models can accept two temperature sensors. Depending on the configuration, dual-sensor inputs can be used for functions such as sensor backup, differential temperature measurement, average temperature measurement, and sensor comparison and diagnostic functions.
The transmitter converts the measured sensor signal into a standardized output suitable for process control systems.
4 to 20 mA Output: Selected Rosemount models provide a 4 to 20 mA analog output for connection to PLC, DCS, and other process control inputs. Where HART communication is supported, digital configuration and diagnostic information can be transmitted over the analog current loop.
Digital Communication: Communication options vary by Rosemount series and model and may include HART, FOUNDATION Fieldbus, and PROFIBUS PA. The communication protocol should be specified during model selection to ensure compatibility with the plant's existing control and asset-management system.
Key Features
Flexible Sensor Configuration: Depending on the model, the transmitter can be configured for different RTD, thermocouple, resistance, or millivolt inputs, allowing the same product family to cover a range of temperature measurement requirements.
Sensor Characterization: Selected models support sensor-specific configuration or characterization parameters to account for individual sensor characteristics where supported.
Dual-Sensor Measurement: Dual-input models provide additional measurement options such as sensor backup, differential measurement, or sensor comparison.
Remote Configuration: Models with supported digital communication allow configuration and diagnostic functions to be accessed through compatible host systems or handheld communication equipment.
Industrial Installation Options: Available in different mounting arrangements, including head-mounted and DIN-rail configurations.
Hazardous-Area Options: Selected models are available with hazardous-area certifications for installations where plant classification requires certified instrumentation.
Technical Specifications
|
Technical Parameter |
Selection / Configuration Information |
|
Input Type |
RTD, thermocouple, resistance, or millivolt, depending on model |
|
Sensor Configuration |
Single or dual sensor, depending on model |
|
RTD Options |
Pt100 and other supported RTD configurations |
|
Thermocouple Options |
Model-dependent thermocouple types |
|
Output |
4 to 20 mA and/or supported digital communication options |
|
Communication |
HART, FOUNDATION Fieldbus, PROFIBUS PA, or other model-specific options |
|
Sensor Characterization |
Available on selected configurations |
|
Mounting |
Head-mount, DIN-rail, or other model-specific arrangements |
|
Display |
Available on selected transmitter configurations |
|
Operating Temperature |
Confirm according to the exact model and installation configuration |
|
Enclosure |
Model-dependent enclosure material and protection rating |
|
Hazardous-Area Approval |
Certification options depend on the selected model |
|
Power Supply |
Confirm according to the selected transmitter model and output configuration |
Applications
Oil and Gas
Process temperature measurement in refining, hydrocarbon processing, storage, and associated process systems where RTD or thermocouple signals must be integrated into plant control systems.
Chemical Processing
Temperature measurement on reactors, process vessels, heat-transfer systems, and other equipment requiring continuous temperature signals for monitoring and control.
Power Generation
Integrated into temperature measurement points throughout power-generation systems, subject to the selected sensor, temperature range, and certification requirements.
Process Skids
OEM and packaged-skid builders can integrate temperature transmitters into standardized instrumentation architectures for process monitoring and control.
Model Selection and Configuration
Selecting a temperature transmitter requires more than matching the nominal temperature range. The transmitter must also be compatible with the installed sensor and control-system architecture.
Confirm the Sensor Type:
Specify whether the application uses an RTD, thermocouple, resistance input, or millivolt input. For RTDs, confirm the resistance value and wiring configuration.
Confirm Single or Dual Input
Choose single-sensor for conventional loops, or dual-sensor when the application requires sensor backup, differential measurement, averaging, or comparison functions.
Select the Communication Interface
Confirm whether the control system requires 4 to 20 mA, HART, FOUNDATION Fieldbus, or PROFIBUS PA compatibility.
Check the Mounting Arrangement
Specify head-mounted or DIN-rail transmitter configurations to match your sensor connection head, control cabinet, or skid layout.
Confirm Hazardous-Area Requirements
Provide the applicable area or zone classification and required certification for classified industrial environments.
Confirm Environmental Conditions
Provide expected ambient and process temperature ranges, enclosure requirements, and operational limits.
Supply, Configuration and Quality Inspection
Model and Configuration Verification: Before shipment, the supplied transmitter configuration is checked against approved specifications, including model designation, sensor input, output, communication option, mounting arrangement, and certification requirements.
Pre-Shipment Configuration: Where supported, parameters such as sensor type, measurement range, and damping can be configured according to your requirements before shipment.
Functional Verification: Applicable pre-shipment checks include power-up verification, configuration review, and output verification using calibrated test equipment.
Documentation and Traceability: Product documentation and certification records can be supplied according to the selected model to support internal QA requirements.
FAQ
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