Technical Data
CompareThermometer
| Measuring Principle | Resistance Temperature Detector |
| Characteristic / Application | self-calibrating metric style compact temperature probe hygienic design life sciences, food & beverage |
| Thermowell / protection tube | without incl. thermowell incl. Tee-/elbow thermowell |
| Insert / probe | without exchangeable insert |
| Outer diameter protection tube / Insert | 6.0 mm (0.24'') 9.0 mm (0.35'') 12.7 mm (0.5") |
| Max. immersion length on request | up to 900.00 mm (35.4'') |
| Material protection tube/ thermowell | 1.4435 Delta Ferrite < 1% 316L |
| Process connection | compression fitting weld in adapter clamp connections acc. to ISO 2852 screwed pipe joint acc. to DIN 11851 aseptic screwed pipe joint acc. to DIN 11864-1 metallic sealing system thread acc. to ISO 228 for Liquiphant adaptor APV Inline Varivent Ingold SMS 1147 Neumo Biocontrol TT411 elbow thermowell DIN 11865 |
| Tip shape | straight reduced |
| Surface roughness Ra | 0.76 μm (29.92 μin) 0.38 μm (14.96 μin) 0.38 μm (14.96 μin) electropolished |
| Operating temperature range | Pt100: -40 °C to 160 °C (-40 °F to 320 °F), optional up to 190 °C (374 °F) reference point for automated calibration |
| Max. process pressure (static) | at 20 °C: 40 bar (580 psi) |
| Response time | t50 = 2.5 s t90 = 5.4 s |
| Integration head transmitter | no (4 to 20 mA signal, HART) |
| Ex - approvals | ATEX IECEx Ex ia CSA C/US IS UKCA Ex ia |
The award-winning iTHERM TM371 smart thermometer integrates a HART® transmitter and Heartbeat Technology and is equipped with the world's first fully automatic in-situ self-calibrating RTD sensor. It effectively prevents the risk of undetected non-compliance in food & beverage and life sciences industry applications, shortens production downtime and increases product safety and process efficiency. The product fully complies with FDA 21 CFR Part 11 and GMP standards.
Advantages
The self-calibration function and “Heartbeat Technology” reduce operating risk and costs
Thanks to the fully automatic and fully traceable built-in self-calibration function, the production process does not need to be interrupted
Fully automatic archiving of records, with storage of 350 calibration points.
Calibration certificates can be printed for use as audit documentation.
Automatic 4-20 mA loop testing saves time and increases process safety. Learn how iTHERM TrustSens performs fully automatic loop testing in five simple steps. The video shows the device setup and how your process benefits.
Avoids non-compliance or undetectable faults
International certificates and approvals: ASME BPE, FDA, 3-A, 1935/2004, 2023/2006, 10/2011, CE CRN, CSA general certification
Highest measuring accuracy at the measuring point through sensor-transmitter matching
Application
Specifically designed for hygienic and aseptic applications in the food & beverage and life sciences industries
Measuring range: –40...+160 °C (–40...+320 °F)
Maximum pressure: 50 bar (725 psi)
Protection rating: IP67/68 or IP69K
Communication: 4...20 mA HART® analog output
Spare Parts & Accessories 34
34 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 60022519 | screw plug | Details |
| 71405560 | Weld-in adapter M12x1.5 1.4435/316L | Details |
| 71424800 | 1/2" G-thread basefor connection with G1/2" female thread. Material 316L/1.4435. 2x leakage bore. | Details |
| 71535692 | Plug screw fitting 316L M12x1.5 | Details |
| 71531585 | Adapter for Ingold connection, 3.1Material certificate | Details |
| 71531588 | Adapter for Ingold connection | Details |
| 71744229 | O-ring sealing kit Ingold connectionPacking unit: 5 pieces. | Details |
| 52018765 | weld socketFlush mount process connection FTL20 "1", FTL20H "GDJ", FMI51, FTI51 "GQJ" Material: 316L, EHEDG compliant Seal: Silicone O-ring Inspection cert. EN10204-3.1 material (316L wetted parts) | Details |
| 52028295 | weld socketFlush mount process connection FTL20 "1", FTL20H "GDJ" w/o flange Material: 316L, EHEDG compliant Seal: Silicone O-ring Inspection cert. EN10204-3.1 material (316L wetted parts) | Details |
| 52021717 | O-ringfor weld-in adapter G3/4 D=50 316L Liquiphant T FTL20H | Details |
| 52001052 | weld socketFlush mount process connection FTL50/FTL50H "GQ2" Material: 316L Seal: Silicone O-ring | Details |
| 52011897 | weld socketFlush mount process connection. Material: 316L. Inspection cert. EN10204-3.1 material. Seal: silicone O-ring. FDA, 3-A compliant. additional EPDM O-ring. FDA, EHEDG, 3-A, USP Class VI compliant. Usage: FTL41, FTL43, FTL50, FTL50H, FTL51B, FTL63, FTL80, QMW43, TMR35. | Details |
| 52014473 | O-ringfor weld-in adapter G3/4 Liquiphant M "GQ2" | Details |
| 71093129 | weld socketFlush mount process connection. Material: 316L. Inspection cert. EN10204-3.1 material Seal: silicone O-ring FDA, 3-A compliant. Additional EPDM O-ring. FDA, EHEDG, 3-A, USP Class VI compliant. Usage: FMI51, FMI52, FTI51, FTI52, FTL31, FTL20H, FTL33, FTL41, FTL43, FTL50, FTL50H, FTL51, FTL51B, FTL51H, FTL63, FTL80, FTL81, FTL260, PMP135, PTP35, PTP33B, PMP23, PMP43, PMP51, FTW23, FTW33, QMW43. | Details |
| 52014472 | O-ringfor weld-in adapter G1 (52001051) Liquiphant M "GW2" Liquiphant T "7", Liquicap M "GWJ", Cerabar T PMP135 "N", Ceraphant T PTP35 "BB" for weld-in andapter G1, 316L 3.1 (52011896) Liquiphant M "GW2", Cerabar T PMP135 "N", Ceraphant T PTP35 "BB" for sliding sleeve Soliphant T | Details |
| 52001051 | Process connection | Weld-in G1, d=60, 316L齐平安装式过程连接 FTL260 "0", FTL20 "7", FTL20H "GEJ", FTL330H/FTL330L "G", FTL50/FTL51, FTL50H/FTL51H "GW2", FMI51/FMI52, FTI51/FTI52 "GWJ", PMP135 "N", PTP35 "BB" 材质: 316L 密封: 硅橡胶 O-ring | Details |
| 52011896 | Welding socket, G1, d=60, 3.1 material certificateFlush mount process connection FTL260 "0", FTL20H "GEJ", FTL50/FTL51, FTL50H/FTL51H "GW2", FMI51/FMI52, FTI51/FTI52 "GWJ", PMP135 "N", PTP35 "BB" Material: 316L Seal: Silicone O-ring Inspection cert. EN10204-3.1 material (316L wetted parts) | Details |
| 52001221 | weld socketFlush mount process connection FTL260 "0", FTL20 "7", FTL20H "GEJ", FTL330H/FTL330L "G", FTL50/FTL51, FTL50H/FTL51H "GW2" Liquiphant is adjustable Material: 316L Seal: Silicone O-ring | Details |
| 52011898 | weld socketFlush mount process connection FTL260 "0", FTL20H "GEJ", FTL50/FTL51, FTL50H/FTL51H "GW2" Liquiphant is adjustable Material: 316L Seal: Silicone O-ring Inspection cert. EN10204-3.1 material (316L wetted parts) | Details |
| 52014424 | Sealing gasketfor weld-in adapter G1, adjustable, 316L (52001221) Liquiphant M "GW2" for weld-in adapter G1, adjustable, 316L (52011898) Liquiphant M "GW2" for weld-in adapter G1, adjustable Liquiphant FTL330H/FTL330L, Liquiphant T FTL20H "UPJ | Details |
Configurator / Comparison
Source:Endress+Hauserwebsite public information
Measuring principle video
Click to playManuals & Documents 8
All documents for this model8 documents · click to expand
BA iTHERM TrustSens TM371 Chinese
iTHERM TrustSens自标定监测 Chinese
BA iTHERM TrustSens TM371 English
BA iTHERM TrustSens Calibration Monitoring English
TI 焊接接头、过程转接头和法兰 Chinese
TI iTHERM TrustSens TM371 Chinese
TI Weld-in adapter, process adapter and flanges English
TI iTHERM TrustSens TM371 English
Case Studies
Municipal Wastewater Treatment · thermistor — Application Case
Project Overview
The site is the inlet, biological and outlet stages of a municipal plant. The customer wanted thermistor properly configured on the existing plant, with the aim of high-accuracy temperature measurement with platinum resistance elements.
Technical Challenges
What actually causes trouble is high solids and corrosive fractions, with large diurnal flow swings, and effluent parameters drift and probes foul with sludge and biofilm. All of this means the thermistor configuration has to involve choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth.
Configuration
Supply and installation were organised through the temperature range: temperature solution matched to measuring point and response needs. On site this meant choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth, checked line by line against: stable compliance with Grade 1A discharge limits and online data reporting.
Performance
After commissioning the outcome is clear accuracy advantage at low temperatures, giving tighter process windows, and the readings are now used for process tuning.
Food & Beverage · thermistor — Application Case
Site Conditions
This is a Food & Beverage customer whose plant is at dosing, pasteurising, filling and CIP stages. The main task was high-accuracy temperature measurement with platinum resistance elements.
The Problem
The difficulty lies in syrups, dairy and beverages that scale easily, under strict hygienic requirements; at the same time frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles. Specification therefore means choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth.
What We Did
We took a temperature range approach — temperature solution matched to measuring point and response needs. Delivery was built around choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth, with point-by-point checks on: food-safety and hygienic design per 3-A / EHEDG.
Operating Outcome
In service the system performs as intended — clear accuracy advantage at low temperatures, giving tighter process windows, with routine maintenance falling noticeably.
Chemical & Pharmaceutical · thermistor — Application Case
Application Context
reactors, metering vessels and finished-product tanks is a typical Chemical & Pharmaceutical duty. The project started from thermistor, focusing on high-accuracy temperature measurement with platinum resistance elements.
Process Constraints
corrosion plus Ex protection shortens instrument life and makes downtime costly, and highly corrosive media with solvents and crystallisation, partly in explosive atmospheres only amplify it. The thermistor specification must therefore cover choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth.
Delivery Approach
Delivery was handled as the temperature range — temperature solution matched to measuring point and response needs. Execution centred on choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth, together with Ex certification and GMP traceability of records.
Field Results
Operation shows the benefit clearly — clear accuracy advantage at low temperatures, giving tighter process windows, with confidence in this measuring point improving markedly.
Power & Energy · thermistor — Application Case
Customer Profile
The typical setting in Power & Energy is boiler feedwater, turbine condensate and FGD/DeNOx systems. The measuring point is thermistor; the focus is high-accuracy temperature measurement with platinum resistance elements.
Key Difficulties
Conditions are high temperature and pressure with both steam and saline water and, on top of that, drift under high temperature and pressure, with very costly unplanned outages, which a standard configuration cannot handle for long. The design therefore starts with choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth.
Implementation
The scope ran through the temperature range: temperature solution matched to measuring point and response needs. Technically it hinges on choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth, and on these requirements: compliance with power-industry codes and unit availability targets.
Customer Benefit
In practice this means clear accuracy advantage at low temperatures, giving tighter process windows, which cut the workload on the site maintenance team.
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