Critical Technical Advantages
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Straightforward Sensor Support: The TMT31 is available in two dedicated versions to suit your primary sensor needs: one optimized for Pt100 and Pt1000 RTD sensors, and another for all common thermocouple (TC) types. This specialization ensures stable signal conversion for the most widely used industrial temperature probes.
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Fast Push-In Terminal Technology: To significantly reduce labor time during setup and maintenance, the transmitter features push-in terminals. This allows for rapid, tool-free wiring that is more resistant to vibration than traditional screw terminals, ensuring a secure electrical connection over the life of the instrument.
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Accurate Sensor-Transmitter Matching: By utilizing the Callendar-van Dusen (CvD) coefficients of a specific RTD sensor, the TMT31 can be matched perfectly to the probe. This calibration technique eliminates the standard interchangeability error of the sensor, providing much higher total measuring point accuracy.
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Standardized Diagnostics: In alignment with NAMUR NE 107, the TMT31 provides clear diagnostic status information. It monitors the health of both the internal hardware and the connected sensor (detecting wire breaks or short circuits), allowing for faster troubleshooting and improved plant uptime.
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Zone 2 / Div. 2 Safety: The transmitter is approved for use in hazardous areas classified as Zone 2 (Ex ec) or Division 2. This makes it a safe and compliant choice for a vast range of chemical, energy, and general process environments.
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Versatile Form Factors: The device is designed for maximum installation flexibility. It fits perfectly into standard DIN Form B terminal heads for field thermometers or can be ordered as a DIN rail module for centralized control cabinet integration.
Technical Performance Matrix
| Feature | Details |
| Input | 1 x RTD (Pt100/Pt1000) or 1 x TC (Common types) |
| Output | 4 to 20 mA (Analog) |
| Accuracy | High precision with CvD matching |
| Safety Approval | ATEX/IECEx Zone 2 (Ex ec), CSA C/US Div. 2 |
| Diagnostics | NAMUR NE 107 compliant |
| Wiring | Tool-free push-in terminals |
| Mounting | Head mount (Form B) or DIN rail |
Primary Applications
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Standard Process Monitoring: Ideal for general-purpose temperature measurement in utilities, water treatment, and food and beverage production.
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Hygienic Thermometers: Reliable integration into washdown-ready thermometers used in life sciences and food processing.
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Cabinet Integration: Using the DIN rail version to centralize temperature data from various points in a plant into a single control panel.
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Hazardous Area Safety: Providing compliant temperature measurements in areas where explosive gases may occasionally be present (Zone 2/Div. 2).
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OEM and Modular Skids: A cost-effective and reliable choice for machine builders who require simple, pre-programmed transmitters for their equipment.
