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Endress+Hauser
Endress+Hauser iTHERM ModuLine TM121 Thermometer
Quote on request
No online payment · add lines to RFQ BOM
Modular RTD/TC with welded thermowell; to IP68. RFQ + selection help.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Measuring range
Pt100 TF −50 to +200 °C; TC type K up to +650 °C (family up to +1100 °C type K / +750 °C type J per TI01455T)
Accuracy
Pt100 per IEC 60751 Class A/B (class depends on sensor option); TC standard classes per IEC 60584
Output
Direct-wired sensor or head transmitter 4–20 mA / HART / other common protocols (iTEMP family options)
Supply
Depends on selected head transmitter (typically 4–20 mA loop)
Process connection
Wide range of process connections; welded thermowell modular assembly
Protection
Up to IP68
Fits industrial temperature points where you need an iTHERM ModuLine TM121 modular RTD/TC assembly with welded thermowell and optional head transmitter.
Key advantages
- Sensor — Metric modular RTD/TC with welded thermowell (iTHERM ModuLine TM121)
- Range — Pt100 TF −50 to +200 °C; TC type K up to +650 °C (family higher per TI)
- Output — Direct-wired sensor or head transmitter 4–20 mA / HART / common protocols
- Accuracy — Pt100 IEC 60751 Class A/B; TC classes per IEC 60584
- Protection — Up to IP68; pressure to 50 bar (725 psi) class per TI
Typical applications
- Process pipes and vessels needing modular thermowell thermometers.
- Sites standardizing on iTEMP head transmitters with HART.
- Non-hazardous area metric temperature assemblies.
Selection guide
- Sensor — Pt100 vs thermocouple type and class
- Thermowell / connection — Process connection and immersion length
- Transmitter — Direct wire vs 4–20 mA/HART head
- Area — Basic TM121 is for non-hazardous areas — confirm if Ex needed
Common mistakes
- Ordering TM121 into a classified area without checking Ex alternatives.
- Undersizing thermowell for velocity/pressure.
- Omitting immersion length so the tip sits in the boundary layer.
When to RFQ / what to tell us
- RTD vs TC, span, and accuracy class.
- Thermowell connection, length, material; transmitter yes/no.
- Quantity and ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 141128 |
| Brand | Endress+Hauser |
| Model | iTHERM ModuLine TM121 |
| Product type | Industrial Thermometer |
| Measuring range | Pt100 TF −50 to +200 °C; TC type K up to +650 °C (family up to +1100 °C type K / +750 °C type J per TI01455T) |
| Accuracy | Pt100 per IEC 60751 Class A/B (class depends on sensor option); TC standard classes per IEC 60584 |
| Output | Direct-wired sensor or head transmitter 4–20 mA / HART / other common protocols (iTEMP family options) |
| Sensor type | Metric modular RTD/TC industrial thermometer with welded thermowell (iTHERM ModuLine TM121) |
| Process connection | Wide range of process connections; welded thermowell modular assembly |
| IP rating | Up to IP68 |
| Mounting | Process thermowell / modular insert + terminal head |
Documents
FAQ
Q: What measuring ranges are typical? A: Pt100 TF −50 to +200 °C; TC type K up to +650 °C (see TI for family extremes).
Q: Can it include a transmitter? A: Yes — optional iTEMP head transmitters with 4–20 mA/HART and other protocols.
Q: What should I send for a quote? A: Sensor type/span, thermowell details, transmitter, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Measuring range | Pt100 TF −50 to +200 °C; TC type K up to +650 °C (family up to +1100 °C type K / +750 °C type J per TI01455T) |
| Accuracy | Pt100 per IEC 60751 Class A/B (class depends on sensor option); TC standard classes per IEC 60584 |
| Output | Direct-wired sensor or head transmitter 4–20 mA / HART / other common protocols (iTEMP family options) |
| Supply | Depends on selected head transmitter (typically 4–20 mA loop) |
| Process connection | Wide range of process connections; welded thermowell modular assembly |
| Protection | Up to IP68 |
| Approvals | For use in non-hazardous areas (basic TM121) |
| Mounting | Process thermowell / modular insert + terminal head |
| Sensor type | Metric modular RTD/TC industrial thermometer with welded thermowell (iTHERM ModuLine TM121) |
| Notes | Specs from Endress+Hauser TI01455TEN (2025-05-12) and BA01915TEN. Pressure range up to 50 bar (725 psi). |