Description
Micron TX2W 2-Wire Head Mounting Temperature Transmitter – Linearised Pt100
The Micron TX2W 2-Wire Transmitter is a compact, reliable, and linearised temperature transmitter designed for converting a Pt100 RTD temperature signal into a standard 2-wire industrial transmission signal. Designed for head mounting, the TX2W provides a practical interface between temperature sensors and process-control, monitoring, and automation systems.
The transmitter is specifically designed for Pt100, 3-wire input and operates using true two-wire technology. This makes it suitable for industrial temperature measurement systems where the sensor signal needs to be transmitted over longer distances to a PLC, DCS, SCADA system, indicator, recorder, or other receiving instrument.
The TX2W operates from a 10 to 30 V DC supply and is designed for industrial loop-powered applications. Its compact construction allows it to be installed conveniently within suitable temperature sensor head assemblies or related instrumentation enclosures.
With a specified accuracy of ±0.2% F.S., linearised, the transmitter provides a stable and convenient method of converting the Pt100 signal into a usable process transmission signal. Linearisation helps provide a more appropriate output relationship corresponding to the temperature measured by the RTD.
The Micron TX2W is particularly suitable for industrial process plants, chemical industries, pharmaceutical manufacturing, food processing, HVAC systems, machinery, storage systems, heating equipment, ovens, tanks, vessels, pipelines, and general process automation.
What Is a 2-Wire Temperature Transmitter?
A temperature transmitter receives the relatively low-level signal from a temperature sensor and converts it into a standard industrial signal that can be transmitted to remote instrumentation.
In a conventional temperature measurement system, the sensor may be installed some distance away from the control panel. Directly extending RTD wiring over long distances can introduce additional resistance and measurement errors.
A transmitter installed close to the sensor helps convert the sensor measurement into a standardized process signal suitable for transmission to the control system.
The Micron TX2W uses true two-wire operation, allowing the same two wires to provide the transmitter’s loop power and carry the output signal.
Pt100 3-Wire Input
The TX2W is designed for Pt100 / 3-wire RTD input.
Pt100 is one of the most widely used resistance temperature detectors in industrial temperature measurement. Its resistance changes predictably with temperature, allowing the transmitter to calculate the corresponding process temperature.
The use of a 3-wire Pt100 connection helps compensate for the resistance of the connecting wires and can provide better measurement performance than a basic 2-wire RTD connection.
Typical Pt100 applications include:
- Process vessels
- Pipelines
- Heating systems
- Industrial machinery
- Ovens
- Food processing equipment
- Pharmaceutical equipment
- HVAC systems
- Storage tanks
- Laboratory equipment
True Two-Wire Operation
One of the primary features of the TX2W is its true two-wire operation.
In a true 2-wire transmitter loop, the same pair of wires is used to:
- Supply power to the transmitter.
- Carry the measurement output signal.
This arrangement helps simplify field wiring and reduces the number of conductors required between the sensor/transmitter location and the receiving instrument.
Advantages include:
- Simplified wiring
- Reduced cable requirements
- Easy integration into control systems
- Suitable for remote temperature measurement
- Convenient installation
- Compatibility with industrial process loops
This makes the TX2W particularly useful for distributed temperature measurement installations.
Linearised Temperature Transmission
The TX2W provides a linearised output from the Pt100 input.
Temperature sensors such as RTDs have a resistance-versus-temperature relationship rather than a simple linear electrical output. The transmitter processes the RTD signal and provides a corresponding standardized output relationship.
Linearisation helps improve the usefulness of the transmitted temperature signal when it is received by downstream instrumentation.
This is particularly useful when the signal is connected to:
- PLC analog inputs
- DCS input modules
- SCADA systems
- Digital indicators
- Process recorders
- Data acquisition systems
- Temperature monitoring systems
±0.2% Full-Scale Accuracy
The TX2W has a specified accuracy of ±0.2% F.S. linearised.
This provides a suitable measurement performance for many industrial temperature monitoring and process-control applications.
Actual system accuracy can depend on several factors, including:
- Pt100 sensor accuracy
- Sensor installation
- Wiring quality
- Ambient temperature
- Power supply stability
- Receiving instrument accuracy
- Calibration condition
For critical applications, the complete measurement system should be evaluated rather than considering transmitter accuracy alone.
10–30 V DC Supply
The Micron TX2W operates from a 10 to 30 V DC supply.
This broad supply range provides flexibility for integration into different industrial control systems.
The transmitter is designed for loop-powered operation, making it suitable for typical industrial instrumentation environments.
The specified load condition is:
600 Ω maximum at 20 mA with 24 V DC, as provided in the supplied specification.
The actual permissible loop resistance should be considered together with supply voltage and the requirements of the complete loop.
Compact Head-Mounting Design
The TX2W is designed for installation in suitable sensor head or instrumentation assemblies.
Available size configurations are specified as:
- 22 × 74 × 100 mm
- 72 × 110 × 80 mm
The compact design allows the transmitter to be incorporated into temperature measurement assemblies without requiring a large separate control-panel enclosure.
Head-mounted transmitters are particularly useful when the sensor is installed directly at the process location.
Remote Temperature Measurement
The TX2W can help overcome some of the practical limitations associated with transmitting raw RTD signals over long distances.
A typical system can consist of:
Pt100 Sensor → TX2W Transmitter → Two-Wire Signal Loop → PLC/DCS/Indicator
This arrangement places the signal-conditioning electronics close to the temperature sensor while allowing the standardized signal to travel to the control system.
This is useful for large industrial facilities where temperature sensors may be installed far away from the main control panel.
Industrial Applications
The Micron TX2W can be used in many industries where Pt100 temperature measurement is required.
1. Process Industries
Suitable for temperature monitoring in process plants, tanks, vessels, and pipelines.
2. Chemical Industry
Can be used for monitoring process temperatures in reactors, tanks, and associated equipment.
3. Pharmaceutical Industry
Suitable for temperature monitoring systems where Pt100 sensors are commonly used.
4. Food Processing
Can be integrated into temperature monitoring systems for processing, storage, heating, and cooling equipment.
5. HVAC
Suitable for temperature measurement in air-handling systems, heating systems, cooling systems, and equipment monitoring.
6. Industrial Machinery
Can be used with machines requiring remote temperature measurement and transmission.
7. Heating Systems
Suitable for ovens, heating chambers, tanks, and other temperature-controlled equipment.
8. Storage Systems
Can be integrated into temperature monitoring applications for storage rooms, tanks, and controlled environments.
Integration With Automation Systems
The TX2W is designed to work as part of an industrial measurement loop.
It can be connected to suitable receiving equipment such as:
- PLCs
- DCS systems
- SCADA systems
- Digital indicators
- Process controllers
- Data acquisition equipment
- Industrial recorders
The transmitter’s standardized loop signal allows temperature information to be incorporated into larger monitoring and automation systems.
Benefits of Micron TX2W
The key benefits of the Micron TX2W include:
- Pt100 3-wire input
- True two-wire operation
- Linearised temperature transmission
- ±0.2% F.S. accuracy
- 10–30 V DC supply
- Compact construction
- Head-mounting design
- Reduced field wiring
- Suitable for remote temperature measurement
- Easy integration with automation systems
- Suitable for PLC/DCS/SCADA applications
- Useful for industrial process monitoring
- Low-maintenance instrumentation solution
Why Choose the Micron TX2W?
The Micron TX2W 2-Wire Head Mounting Temperature Transmitter provides a practical solution for converting a Pt100 3-wire RTD measurement into a linearised industrial transmission signal.
Its true two-wire operation simplifies field installation, while the compact head-mounting design allows the transmitter to be positioned close to the temperature sensor. The 10–30 V DC operating supply and specified ±0.2% F.S. linearised accuracy make it suitable for a wide range of industrial measurement applications.
For process engineers, instrumentation professionals, OEM machine manufacturers, automation integrators, and maintenance departments, the TX2W can provide an efficient way to integrate Pt100 temperature sensors into modern process-control systems.
Japsin Instrumentation – Since 1974
