Technical Data
CompareTemperature transmitters
| Measuring Principle | Head transmitter |
| Input | 1x Pt100 / Pt1000, TC |
| Output | 1 x analog 4...20 mA |
| Auxiliary power supply | 10...36 V DC |
| Communication | pc-programmable |
| Installation | Terminal head form B / DIN rail |
| Accuracy | (Pt100,Pt1000, -50…+250°C) <= 0,1 K (Pt100,Pt1000, -58…+482°F) <= 0,18° F |
| Galvanic isolation | Yes (TC) |
| Certification | DNV (GL) marine approval ATEX Ex ec CSA C/US General Purpose CSA C/US NI, Ex ec ATEX+ CSA C/US Ex ec Non-hazardous area + KC marking (Head, DinRail) |
The iTEMP TMT31 is a single-channel temperature transmitter with high reliability and high long-term stability, outputting a 4...20 mA current signal. It is installed directly in a type B terminal head and is approved for use in Zone 2 / Div. 2 hazardous areas. Transmitter-sensor matching based on Callendar-Van Dusen linearization coefficients increases the measurement accuracy of resistance thermometers. Push-in terminals enable fast field wiring and instrument installation. The instrument can be pre-configured, or parameters can be set easily using free software.
Benefits
Push-in terminals allow fast instrument installation or maintenance without tools
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Convenient parameter setting with free software (requires FXA291 or TXU10)
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Transmitter-sensor matching at critical measuring points based on Callendar-Van Dusen linearization coefficients
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Optimized resistance thermometer measurement accuracy of up to 0.1 K with high long-term stability
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Diagnostic information in accordance with NAMUR NE 107
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Plug & play: supports factory pre-configuration
Applications
Reliable, highly accurate temperature measurement in combination with various industrial and hygienic versions
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Approved for use in Zone 2 (Ex ec) / Div. 2 hazardous areas
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Input: one Pt100 or Pt1000 (two-wire, three-wire or four-wire) resistance thermometer input
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Output: 4...20 mA analog output
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Pre-configured instrument parameters or factory parameter setting
Installed in a type B terminal head in accordance with DIN EN 50446
Spare Parts & Accessories 8
8 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| TMT31- | F+ Temperature transmitter TMT312-wire temperature transmitter. Single sensor input. Application: RTD/TC. Factory setup w/o additional specification: Pt100, 4-wire, 0...+100oC, presetting failure current low. Consider additional marine certificate requirements on application side. | Enquire |
| 71044061 | equipment package2x screws, 2x springs, 2x spring rings, 1x sealing CDI-connector | Details |
| 71044062 | equipment package2x screws, 1x sealing CDI-connector | Details |
| 71528231 | DIN rail mounting accessoryClip according to IEC 60715 for temperature head transmitters. Packing unit: 2 pieces | Details |
| 71564518 | Spare part kit, push-in terminals, TMT7x/3x | Details |
| 71564510 | Spare part kit screw terminals TMT7x/3x | Details |
| TXU10- | Instrument Commissioning Kit TXU10用于可以PC编程调试的设备 程序设置+用于带USB接口的PC的连接线 | Enquire |
| FXA195- | Communication interface FXA195Modem to connect HART field devices to a computer via USB. Commissioning of field devices with software tool. :: To connect to a intrinsically safe signal circuit. :: SIL2, IEC61508. | Enquire |
Configurator / Comparison
Source: Endress+Hauserpublic information from the website
Measuring principle video
Click to playManuals & Documents 4
All documents for this modelCase Studies
Municipal Wastewater Treatment · Temperature transmitter — Application Case
Site Conditions
This is a Municipal Wastewater Treatment customer whose plant is at the inlet, biological and outlet stages of a municipal plant. The main task was converting RTD or thermocouple signals into a standard current output.
The Problem
The difficulty lies in high solids and corrosive fractions, with large diurnal flow swings; at the same time effluent parameters drift and probes foul with sludge and biofilm. Specification therefore means choosing integral or remote versions by ambient, Ex zone and mounting.
What We Did
We took a temperature range approach — temperature solution matched to measuring point and response needs. Delivery was built around choosing integral or remote versions by ambient, Ex zone and mounting, with point-by-point checks on: stable compliance with Grade 1A discharge limits and online data reporting.
Operating Outcome
In service the system performs as intended — better noise immunity and much smaller transmission error, with routine maintenance falling noticeably.
Food & Beverage · Temperature transmitter — Application Case
Application Context
dosing, pasteurising, filling and CIP stages is a typical Food & Beverage duty. The project started from Temperature transmitter, focusing on converting RTD or thermocouple signals into a standard current output.
Process Constraints
frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles, and syrups, dairy and beverages that scale easily, under strict hygienic requirements only amplify it. The Temperature transmitter specification must therefore cover choosing integral or remote versions by ambient, Ex zone and mounting.
Delivery Approach
Delivery was handled as the temperature range — temperature solution matched to measuring point and response needs. Execution centred on choosing integral or remote versions by ambient, Ex zone and mounting, together with food-safety and hygienic design per 3-A / EHEDG.
Field Results
Operation shows the benefit clearly — better noise immunity and much smaller transmission error, with confidence in this measuring point improving markedly.
Chemical & Pharmaceutical · Temperature transmitter — Application Case
Customer Profile
The typical setting in Chemical & Pharmaceutical is reactors, metering vessels and finished-product tanks. The measuring point is Temperature transmitter; the focus is converting RTD or thermocouple signals into a standard current output.
Key Difficulties
Conditions are highly corrosive media with solvents and crystallisation, partly in explosive atmospheres and, on top of that, corrosion plus Ex protection shortens instrument life and makes downtime costly, which a standard configuration cannot handle for long. The design therefore starts with choosing integral or remote versions by ambient, Ex zone and mounting.
Implementation
The scope ran through the temperature range: temperature solution matched to measuring point and response needs. Technically it hinges on choosing integral or remote versions by ambient, Ex zone and mounting, and on these requirements: Ex certification and GMP traceability of records.
Customer Benefit
In practice this means better noise immunity and much smaller transmission error, which cut the workload on the site maintenance team.
Power & Energy · Temperature transmitter — Application Case
Project Background
The project covers boiler feedwater, turbine condensate and FGD/DeNOx systems. The work centres on Temperature transmitter and the core task is converting RTD or thermocouple signals into a standard current output.
Operating Challenges
The medium and duty are characterised by high temperature and pressure with both steam and saline water, and drift under high temperature and pressure, with very costly unplanned outages. So Temperature transmitter cannot be specified generically — it calls for choosing integral or remote versions by ambient, Ex zone and mounting.
Solution
The Ainstru engineering team worked through the temperature range: temperature solution matched to measuring point and response needs. The configuration involves choosing integral or remote versions by ambient, Ex zone and mounting, with these requirements in view: compliance with power-industry codes and unit availability targets.
Results
Since start-up the system has run steadily; the practical result is better noise immunity and much smaller transmission error.
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