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Product picture of Thermometer with RTD or TC insert TM121

iTHERM ModuLine TM121
Industrial modular thermometer

Fundamental metric RTD/TC thermometer with protection tube for a wide range of industrial applications

TM121
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5-year warranty

Engineered for Confidence

Our Fundamental Selection instruments feature an extended 5-year warranty – a clear testament of our trust in their long-term reliability and performance.

Should a warranty case occur, you can count on a fast replacement process and minimal administrative effort – giving you peace of mind when it matters most and helping you keep your operations running smoothly.

Warranty terms apply

The extended warranty is subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

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    • Technical Information (TI)

    TI iTHERM ModuLine TM121

    • Technical Information (TI)
    English version - 05/2025
    New version available in English

    Industrial modular thermometer

    Select other languages, versions and see details Hide selection and details
    EN
    12/05/2025
    31/03/2024
    15/06/2022
    31/03/2021
    15/04/2019

    Language:

    English

    Version:

    12/05/2025

    File size:

    2 MB

    File name:

    TI01455TEN_0525-00.pdf
    • Operating Instruction (BA)

    BA iTHERM ModuLine thermometer

    • Operating Instruction (BA)
    English version - 08/2025
    New version available in English

    Universal, modular RTD/TC thermometers for a wide range of industrial applications

    Select other languages, versions and see details Hide selection and details
    EN
    04/08/2025
    30/11/2024

    Language:

    English

    Version:

    04/08/2025

    File size:

    809.1 KB

    File name:

    BA01915TEN_0325-00.pdf
    • Short Instruction (KA)

    KA iTHERM ModuLine thermometer

    • Short Instruction (KA)
    English version - 04/2025
    New version available in English

    Universal, modular RTD/TC thermometers for a wide range of industrial applications

    Select other languages, versions and see details Hide selection and details
    EN
    01/04/2025

    Language:

    English

    Version:

    01/04/2025

    File size:

    502.1 KB

    File name:

    KA01743TEN_0125-00.pdf
    • Installation Instructions (EA)

    Bild TA20 AB

    • Installation Instructions (EA)
    English version - 04/2025
    New version available in English

    Bild TA20 AB

    Select other languages, versions and see details Hide selection and details
    EN
    01/04/2025

    Language:

    English

    Version:

    01/04/2025

    File size:

    109.8 KB

    File name:

    Bild TA20AB.pdf
    • Installation Instructions (EA)

    Bild TA30D

    • Installation Instructions (EA)
    English version - 08/2025
    New version available in English

    Bild TA30D

    Select other languages, versions and see details Hide selection and details
    EN
    18/08/2025

    Language:

    English

    Version:

    18/08/2025

    File size:

    260.1 KB

    File name:

    Bild_TA30D.pdf
    • Installation Instructions (EA)

    Bild TA30EB

    • Installation Instructions (EA)
    English version - 08/2025
    New version available in English

    Bild TA30EB

    Select other languages, versions and see details Hide selection and details
    EN
    18/08/2025

    Language:

    English

    Version:

    18/08/2025

    File size:

    181.8 KB

    File name:

    Bild TA30EB.pdf
    • Installation Instructions (EA)

    Bild TA30A

    • Installation Instructions (EA)
    English version - 08/2025
    New version available in English

    Bild TA30A

    Select other languages, versions and see details Hide selection and details
    EN
    18/08/2025

    Language:

    English

    Version:

    18/08/2025

    File size:

    220.8 KB

    File name:

    Bild_TA30A.pdf
    • Installation Instructions (EA)

    Typenschild DIENST-T

    • Installation Instructions (EA)
    English version - 11/2025
    New version available in English

    Typenschild DIENST-T

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    EN
    03/11/2025

    Language:

    English

    Version:

    03/11/2025

    File size:

    294.5 KB

    File name:

    DIENST_T.pdf
    • Ex Safety Instruction (XA)

    TRxx、TCxx、TS211、iTHERM TS111、TM211、TPx100、TSx310、TM1x1、TM411、TM412

    • Ex Safety Instruction (XA)
    Chinese version - 07/2020
    New version available in English

    温度计和测温芯子
    Ex nA IIC T6-T1 Gc

    Show details Hide details

    Language:

    Chinese

    Version:

    31/07/2020

    File size:

    1.3 MB

    File name:

    XA02111TZH_0120.pdf
    • Special Documentation (SD)

    Device viewer

    • Special Documentation (SD)
    English version - 07/2021
    New version available in English

    Technical documentation in other languages

    Show details Hide details

    Language:

    English

    Version:

    14/07/2021

    File size:

    478.5 KB

    File name:

    SD02429R09EN_0121.pdf
    • Special Documentation (SD)

    SD IEC 61406-1

    • Special Documentation (SD)
    English version - 05/2023
    New version available in English

    Automatic identification of physical objects

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    EN
    10/05/2023
    03/12/2021
    01/11/2021

    Language:

    English

    Version:

    10/05/2023

    File size:

    649 KB

    File name:

    SD02817TEN_0323-00.pdf
    • Innovation (IN)

    Ridurre la complessità, raggiungere la semplicità.

    • Innovation (IN)
    Italian version - 04/2025
    New version available in English

    Ridurre la complessità,
    raggiungere la semplicità.
    iTHERM ModuLine — facile da configurare
    in base alle vostre esigenze.

    Show details Hide details

    Language:

    Italian

    Version:

    07/04/2025

    File size:

    7.7 MB

    File name:

    IN01360T16IT.pdf
    • Innovation (IN)

    Reduce complexity, achieve simplicity.

    • Innovation (IN)
    English version - 02/2026
    New version available in English

    iTHERM ModuLine — easily configurable
    to your needs.

    Show details Hide details

    Language:

    English

    Version:

    27/02/2026

    File size:

    1.4 MB

    File name:

    IN01360T09EN.pdf
    • Innovation (IN)

    Komplexität reduzieren, Einfachheit erreichen.

    • Innovation (IN)
    German version - 02/2026
    New version available in English

    iTHERM ModuLine – einfach konfigurierbar für Ihre Bedürfnisse.

    Show details Hide details

    Language:

    German

    Version:

    27/02/2026

    File size:

    1.4 MB

    File name:

    IN01360T09DE.pdf
    • Manufacturer Declaration

    Product family: Controller, Process RTD general purpose, Process RTD heavy duty, Process RTD hygienic, RTD thermometer

    • Manufacturer Declaration
    Russian version - 08/2024
    New version available in English

    Product root: FML621-, TM101-, TM111-, TM121-, TM151-, TM311-, TM401-, TMR31-, TMR35-, TR15-, TR65-, TR66-, TTR31-, TTR35-
    Declaration number: ЕАЭС KZ 7500533.13.12.04163
    Manufacturer specification: EMC

    Show details Hide details

    Language:

    Russian

    Version:

    28/08/2024

    File size:

    1.2 MB

    File name:

    EACKZ7500533131204163.pdf
    • Manufacturer Declaration

    Product family: Accessories: RTD insert, Accessories: TC insert, Accessories: Inserts, Magphant, Multipoint thermometers, Process RT D direct contact, Process RTD general purpose, Process RTD heavy duty, Process RTD hygienic, Process TC heavy duty, RTD thermometer

    • Manufacturer Declaration
    English version - 12/2025
    New version available in English

    Product root: DTT31-, DTT35-, TAF11-, TAF12D-, TAF12S-, TAF12T-, TAF16-, TC15-, TC65-, TC66-, TH11-, TM101-, TM111-, TM112-, TM121-,
    TM131-, TM151-, TM152-, TM311-, TM371-, TM372-, TM401-, TM402-, TM411-, TM412-, TM611-, TMR31-, TMR35-, TMS01-, TMS02-, TMS11-, TMS
    12-, TMS21-, TMS31-, TPR100-, TPR300-, TR15-, TR65-, TR66-, TS111-, TS211-, TS901-, TST434B-, TTR31-, TTR35-
    Declaration number: HE_02286_01.25
    Manufacturer specification: RoHS
    Additional information: China RoHS

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    EN
    02/12/2025

    Language:

    English

    Version:

    02/12/2025

    File size:

    302.8 KB

    File name:

    HE_02286_01.25.pdf
    • Manufacturer Declaration

    Product family: Accessories: Bar stock thermowell, Accessories: Pipe thermowell, Accessories: Inserts, Magphant, Process RTD general purpose, Process RTD hygienic, RTD thermometer

    • Manufacturer Declaration
    English version - 07/2023
    New version available in English

    Product root: DTT31-, DTT35-, TK40-, TM101-, TM111-, TM121-, TM131-, TM311-, TM371-, TM372-, TM401-, TM402-, TM411-, TM412-, TMR35-,
    TS111-, TS212-, TT131-, TT151-, TT411-, TT412-
    Declaration number: HE_01494_01.21
    Manufacturer specification: Food hygiene
    Additional information: BSE, TSE

    Show details Hide details

    Language:

    English

    Version:

    27/07/2023

    File size:

    266 KB

    File name:

    HE_00886_07_17.pdf
    • Manufacturer Declaration

    Product family: Process RTD general purpose

    • Manufacturer Declaration
    English version - 04/2024
    New version available in English

    Product root: TM101-, TM111-, TM112-, TM121-, TM131-, TM151-, TM152-
    Declaration number: TM1X1 SUPPLIERS DOC
    Manufacturer specification: RoHS, Explosion protection, EMC
    Additional information: ACMA, Australia

    Show details Hide details

    Language:

    English

    Version:

    12/04/2024

    File size:

    149.4 KB

    File name:

    TM1x1 Suppliers Dec of Conformity_240412.pdf
    • EU Declaration

    Product family: Low cost RTD general purpose, Process RTD direct contact, Process RTD direct in contact, Process RTD general purpose , Process RTD heavy duty, Process RTD hygienic, Process TC direct contact, Process TC direct in contact, Process TC general purpose, Process TC heavy duty, RTD thermometer, TC heavy duty

    • EU Declaration
    English version - 02/2024
    New version available in English

    Product root: TAF11-, TAF12D-, TAF12S-, TAF12T-, TAF16-, TC10-, TC12-, TC13-, TC15-, TC61-, TC62-, TC63-, TC65-, TC66-, TC88-, TEC42
    0-, TH11-, TH12-, TH13-, TH14-, TH15-, TH17-, TH18-, TH27-, TH51-, TH52-, TH53-, TH54-, TH55-, TH56-, TM101-, TM111-, TM112-, TM121-
    , TM131-, TM151-, TM152-, TM401-, TM402-, TM411-, TM412-, TM611-, TMT142C-, TMT142R-, TMT162C-, TMT162R-, TR10-, TR11-, TR12-, TR13-
    , TR15-, TR24-, TR25-, TR44-, TR45-, TR46-, TR47-, TR48-, TR61-, TR62-, TR63-, TR65-, TR66-, TR88-, TSC310-, TSM187-, TSM487-, TST18
    7-, TST310-, TST40N-, TST410-, TST414-, TST41N-, TST434-, TST434B-, TST487-, TST602-, TST90-
    Declaration number: EC_00136_04.24

    Select other languages, versions and see details Hide selection and details
    EN
    20/02/2024

    Language:

    English

    Version:

    20/02/2024

    File size:

    150.6 KB

    File name:

    EC_00136_04.24.pdf
    • UK Conformity Assessed

    Product family: Accessories: RTD insert, Accessories: TC insert, Accessories: Inserts, Process RTD direct contact, Process RTD gener al purpose, Process RTD heavy duty, Process TC direct contact, Process TC direct in contact, Process TC heavy duty

    • UK Conformity Assessed
    English version - 07/2025
    New version available in English

    Product root: TC15-, TC66-, TEC420-, TM101-, TM111-, TM121-, TM131-, TM151-, TM611-, TPC100-, TPC200-, TPR100-, TR10-, TR15-, TR66-,
    TS111-, TS211-, TSC310-, TST310-, TST434-, TST602-
    Declaration number: UK_00473_02.25

    Show details Hide details

    Language:

    English

    Version:

    02/07/2025

    File size:

    129.3 KB

    File name:

    UK_00473_02.25.pdf
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