Temperature

Temperature Measurement

Endress+Hauser’s temperature measurement portfolio spans the complete measurement chain, from primary sensing elements (RTD and thermocouples) and modular or hygienic thermometer assemblies to thermowells, multipoint systems, and iTEMP transmitters, so you can build consistent, traceable loops that fit everything from utility skids to GMP‑regulated production. Selection is structured with the FLEX concept (Fundamental, Lean, Extended, Xpert), helping teams align capability and lifecycle cost with process risk while maintaining a common user experience. The portfolio is global, standardized, and designed for seamless DCS/PLC integration and reliable long‑term performance.

For industrial duties, iTHERM ModuLine thermometers provide a highly modular platform (insertion length, process connection, sensor type, head/transmitter, thermowell) to match mechanical and metrology needs without custom engineering. Engineering aids such as iTHERM QuickNeck enable tool‑free insert replacement to accelerate calibration or sensor exchange, while iTHERM QuickSens inserts deliver t90 response times down to ~1.5 s for tight control on fast‑moving processes. For harsh vibration, iTHERM StrongSens inserts withstand shocks up to ~60 g to preserve measurement stability on turbines, compressors, and rotating equipment. Together these options reduce turnaround time, improve loop response, and extend service life in oil & gas, chemical, and power applications.

Hygienic processes benefit from purpose‑built designs and documentation. The iTHERM TM411/TM412 hygienic thermometers combine industry‑standard aseptic connections with QuickSens/StrongSens and QuickNeck options to shorten maintenance and maintain product quality. When calibration traceability is paramount, the iTHERM TrustSens TM371 integrates the world’s first self‑calibrating Pt100 RTD with Heartbeat functions, automating in‑situ checks to minimize undetected non‑conformities and support FDA/GMP compliance while integrating with Netilion for digital records. For skid builders and OEMs, the compact iTHERM TM311 brings IO‑Link or 4–20 mA out of the box and adds TipSens technology for response times as low as 1.5 s in short‑immersion installations.

Thermowells protect the measurement insert from pressure, flow‑induced forces, and corrosion, and, critically, allow insert replacement without breaking containment, reducing outage time and calibration cost. Endress+Hauser’s portfolio ranges from fabricated hygienic wells to heavy‑duty barstock designs. The iTHERM TT151 barstock thermowell follows DIN/ASME practices with straight, tapered, or stepped tips and multiple process connections; typical use spans pipes, vessels, and high‑pressure services. For applications sensitive to vortex‑induced vibration, the iTHERM TwistWell TT15x adds patented helical strakes that cut VIV by >90%, enabling longer immersions and robust performance where conventional wells struggle. Hygienic wells (e.g., TT411/TT412) support sterile service with fast insert exchange for proof testing and recalibration.

Transmitters complete the loop. iTEMP TMT71/72 head/rail transmitters accept universal RTD/TC, resistance, and mV inputs and provide 4–20 mA/HART with NAMUR NE 107 diagnostics; integrated Bluetooth enables secure local configuration and verification using the SmartBlue app to simplify commissioning and maintenance. Where plants are moving to single‑pair Ethernet architectures, the iTEMP TMT86 adds Ethernet‑APL/PROFINET, an embedded web server, and functions such as sensor‑wire‑corrosion monitoring for predictive maintenance. For cost‑efficient digitalization of simpler points, the iTEMP TMT36 head transmitter brings IO‑Link plus sensor‑transmitter matching (Callendar‑Van Dusen) to tighten uncertainty budgets. The mix lets you standardize topology while choosing the right protocol per asset.

Non‑invasive measurement is now a practical alternative when you cannot breach the process or when leak risk must be avoided. The iTHERM SurfaceLine TM611 clamps to the pipe or vessel, using an optimized thermal coupling element to maximize heat transfer and minimize ambient influence; the result is accuracy and response comparable to invasive measurements, without a tap, shutdown, or added pressure drop. This approach is valuable for validated systems, corrosive or high‑pressure services, brownfield retrofits, and QA spot checks where you want “true measurement” rather than inferred compensation algorithms.

Spatial temperature profiling improves control, safety, and inventory protection wherever gradients matter. iTHERM MultiSens Flex TMS01 uses 3D‑bendable, direct‑contact sensors to generate dense profiles via a single nozzle, ideal for reactors, columns, and high‑pressure vessels; it can be configured with or without thermowells to balance response, mechanical strength, and replaceability, with ranges covering RTD and TC service up to high temperatures and pressures. For storage tanks and silos, the iTHERM MultiSens Bundle TMS31 suspends up to ~20 RTD/TC points along a metal rope to detect stratification, hot spots, and abnormal fronts, improving energy balance, product quality, and safety in bulk liquids and organic solids.

Typical applications cut across the plant: reactor temperature control and selectivity tracking; exotherm detection in polymerization; heat‑exchanger approach temperature monitoring; utility steam loops and thermal oil systems; rotating equipment bearings and seals; tank inventory management and custody; and temperature profiling in bulk storage to prevent spoilage or rollover. With a common digital backbone (HART, IO‑Link, Ethernet‑APL/PROFINET) and tools such as SmartBlue or Field Xpert, you can commission, verify, and document devices faster while standardizing spares and work practices. The outcome is tighter control, higher availability, and lower lifecycle cost without locking into a single architecture.

Vector, your Authorized Endress+Hauser Representative