- with connection head
- Special stainless steel sheated thermocouples
- Thermocouples for shipbuilding applications (GL)
- Thermocouple with explosion proof
- Measuring inserts
- Special types
- Precision thermocouples
- Cable sensors
 Product catalog
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User Manual
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- Sensor ranges from -40 ... +1,260 °C [-40 ... +2,300 °F]
- For mounting in all standard thermowell designs
- Spring-loaded measuring insert (replaceable)
- Explosion-protected versions
- Fixed fitting (welded) measuring insert
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User Manual
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- Sensor ranges from -40 ... +1,200 °C [-40 ... +2,192 °F]
- Made of mineral-insulated sheathed measuring cable
- Functional safety (SIL) with model T32 temperature transmitter
- Spring-loaded design
- Explosion-protected versions are available for many approval types (see data sheet page 2)
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User Manual
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- Sensor ranges from -40 ... +1,200 °C [-40 ... +2,192 °F]
- With integrated fabricated protection tube
- Spring-loaded measuring insert (replaceable)
- Explosion-protected versions are available for many approval types (see data sheet page 2)
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Datasheet
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User Manual
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- Sensor ranges from -40 ... +1,200 °C [-40 ... +2,192 °F]
- With integrated fabricated protection tube
- Spring-loaded measuring insert (replaceable)
- Explosion-protected versions are available for many approval types (see data sheet page 2)
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User Manual
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- Sensor ranges from -40 ... +600 °C [-40 ... +1,112 °F]
- Compact design
- Universal application
- Direct installation into the process
- Explosion-protected versions are available for many approval types (see data sheet page 2)
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Datasheet
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User Manual
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- Sensor ranges from -40 ... +1,200 °C [-40 ... +2,192 °F]
- With integrated fabricated protection tube
- Spring-loaded measuring insert (replaceable)
- Explosion-protected versions are available for many approval types (see data sheet page 2)
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Datasheet
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User Manual
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- Sensor ranges from -40 ... +1,200 °C [-40 ... + 2,192 °F]
- For insertion, screw-in with optional process connection
- Connection head form B or JS
- Explosion-protected versions are available for many approval types (see data sheet page 2)
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Datasheet
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User Manual
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- Sensor ranges from -40 ... +1,200 °C (-40 ... +2,192 °F)
- Made of mineral-insulated sheathed measuring cable
- For all standard thermowell designs
- Spring-loaded design
- Explosion-protected versions
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Datasheet
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User Manual
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- Sensor ranges from -40 ... +1,200 °C (-40 ... +2,192 °F)
- Measuring insert replaceable
- For many thermowell designs
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Datasheet
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User Manual
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- Application ranges from 0 ... 1,200 °C (32 ... 2,192 °F)
- Made of mineral-insulated sheathed cable
- Explosion-protected versions
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Datasheet
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User Manual
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- Sensor ranges from -40 ... +1,200 °C (-40 ... 2,192 °F)
- For insertion, screw-in with optional process connection
- Cable from PVC, silicone, PTFE or glass fibre
- High mechanical strength
- Explosion-protected versions
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User Manual
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- Exclusion of potential faults during installation and operation in hot runner systems thanks to plasticencapsulated transition
- The thermocouple can be installed without any fixing through bending or forming the sheathed cable or with a rotatable (if required, spring-loaded) union screw
- Probe diameter 0.5 ... 3.0 mm [0.020 ... 0.118 in]
- Kapton®, as the industry standard insulating material for connection cables
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Bedienungsanleitung
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- Application range up to 400 °C [752 °F]
- Insertion length and contact pressure can be adjusted through sliding bayonet cap
- Thermocouple cable standard with glass-fibre insulation and stainless steel braid
- Thermocouple type J or K in accordance with IEC 60584 or ASTM E230
- Tip construction: Tubular design
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User Manual
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- The sensor is fixed at a pre-determined bolt length and mounted into the process
- The thermocouple sensors are available with a variety of junction configurations
- Sheath material ranges from stainless steel, corrosion resistant and high temperature oxidation resistant alloys
- Sensor diameter from 4 mm to a flat surface
- Interchangeable and easily replaceable
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User Manual
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- Application range up to 400 °C [752 °F]
- Thermocouple cable standard with glass-fibre insulation and stainless steel braid
- Thermocouple type J or K in accordance with IEC 60584 or ASTM E230
- The manifold thermocouple is a low profile design
- Interchangeable and easily replaceable
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User Manual
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- The sensor is fixed with a pre-determined threaded bolt and mounted into the process
- The nozzle thermocouples are a low profile in design
- Extension cable is available in a variety of insulation and jacketed materials. These include fibreglass, PTFE or PVC to name a few.
- With or without stainless steel overbraid
- Interchangeable and easily replaceable
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User Manual
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- Sensor ranges -40 ... +1,200 °C (-40 ... +2,192 °F)
- Easily exchanged, no thermowell necessary
- For screw-fitting, welding or using a tightening strap
- Cable from PVC, silicone, PTFE or glass fibre
- Explosion-protected versions
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User Manual
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- Simplified maintenance and sensor removal without the use of specialised tools
- Maximum surface contact tip design
- High-temperature applications (up to 540 °C [1,000 °F])
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User Manual
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- Sensor ranges up to max. 1,200 °C (2,193 °F)
- Single and dual thermocouple
- Good heat transfer through adjustable spring-loading
- Easy installation and removal, no tools needed
- Explosion-protected versions
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User Manual
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- Application ranges up to max. 1,600 °C / 2,912 °F (DIN EN 50446)
- Thermowell made of heat-resistant steel or ceramic, also with ceramic inner tube
- Support tube of carbon steel
- Gastight process connection
- Coating (optional)
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User Manual
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WIKA Model TC81 Thermocouple for flue gas temperature measurements – With protection tube model TW81
- Application ranges up to +1,200 °C (+2,192 °F)
- Protection tube from heat-resistant steel
- Measuring insert replaceable
- Gas-tight process connection (option)
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User Manual
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User Manual
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User Manual
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- Application ranges from -40 ... +1,200 °C (-40 ... +2,192 °F)
- For many variants of temperature transmitters including field transmitter
- For mounting in all standard thermowell designs
- Spring-loaded measuring insert (replaceable)
- Explosion-protected versions
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Datasheet
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User Manual
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The straight thermocouple together with a metal thermowell is suitable for temperatures from 0 to 1250 °C (32 to 2282 °F) and can be supplied with a built-in temperature transmitter.
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Datasheet
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The flue gas resistance thermometer with connection head is suitable for the temperature range from -50 to +600 °C (-58 to +1112 °F) and can also be supplied with a built-in tem-perature transmitter.
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Datasheet
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Thermocouples – Robust High-Temperature Measurement for Industry & Lab
Thermocouples (TC) are the first choice for high temperatures, fast dynamics and harsh environments. Our range covers Types K/J/N/T for general use and Types S/R/B for high-temperature processes. Available as mineral-insulated (MI) probes, cable sensors, screw-in probes, surface probes and hygienic designs—optionally with head/field transmitters (4–20 mA/HART, RS-485/Modbus, IO-Link) for direct PLC/Edge/Cloud integration.
ICS Schneider Messtechnik supports you with selection, sizing, thermowells/protection tubes, materials and calibration (incl. documentation). On request, we integrate your points into IIoT dashboards with alarms, reporting and traceability.
FAQ on Thermocouples
Practical guidance on types, accuracy, installation, cold-junction compensation, materials and digitalization.
Which thermocouple type fits my process?
| Type | Typical range | Characteristics | Typical applications |
|---|---|---|---|
| K | up to ~1,200 °C | All-rounder, oxidizing atmospheres | Furnaces, machinery |
| J | up to ~750 °C | Good in reducing atmospheres | Legacy plants, mid-temperature |
| N | up to ~1,200 °C | More stable than K at high T | High-temperature processes |
| T | −200…~350 °C | Excellent at low temperature | Cryo, lab, food |
| S/R | up to ~1,600 °C | Platinum TC, high stability | Glass, metallurgy, lab |
| B | up to ~1,700 °C | Platinum TC, very high T | High-temp furnaces |
How accurate are thermocouples vs. RTDs?
TCs are fast and temperature-resistant, but typically have larger tolerances and higher drift than RTDs. Effective accuracy depends on tolerance class, installation, cable length, interference and the quality of cold-junction compensation (CJC).
What is cold-junction compensation (CJC)?
Thermocouples generate voltage relative to a reference temperature. The transmitter measures the terminal temperature and compensates it. Good CJC (stable sensor, thermally quiet terminal area) is essential for low error.
Which tolerance classes exist?
| Class | Short description | Use |
|---|---|---|
| Class 1 | Tighter tolerances | QA, lab, critical processes |
| Class 2 | Standard tolerances | General industrial applications |
Why use mineral-insulated (MI) cables?
MI probes (compacted MgO) are flexible, vibration-resistant and suitable for high temperatures. Small diameters yield very short response times.
Grounded or ungrounded junction?
| Design | Advantage | Disadvantage | Recommendation |
|---|---|---|---|
| Grounded | Fast, good heat transfer | More sensitive to EMC/loops | Fast processes, low EMC risk |
| Ungrounded | Better isolation, fewer disturbances | Slightly slower | EMC-critical plants, potential differences |
Which protection-tube/thermowell materials make sense?
316L for many media; Hastelloy®/Inconel® for corrosion/high T; ceramics for extreme temperatures. Choose by medium, pressure, flow, temperature and abrasion.
How fast do thermocouples respond?
With small MI diameters (e.g., 1.5–3 mm) you get very short t63/t90. Thermowells and thick protection tubes slow response—use stepped bores or shorter immersion where strength allows.
How long can extension leads be?
TC signals are in the mV range. Use the correct extension/compensating cable, avoid loops/EMC sources, use shielded twisted pairs and ensure proper bonding/grounding.
Which transmitters are IIoT-ready?
Head/rail transmitters with HART/4–20 mA, RS-485/Modbus or IO-Link, ideally with diagnostics, sensor break detection, filters/hysteresis and stable device IDs for clean topic design.
How do I integrate thermocouples to edge/cloud?
Thermocouple → transmitter → edge gateway (Modbus/IO-Link/HART) → MQTT/HTTPS → dashboard/alarms/reports. Security with TLS/VPN, roles/scopes, certificates and audit logs.
How do I choose immersion length?
Rule of thumb: ≥ 10 × outer diameter (min. 50 mm). Place in the flow, keep distance from walls/heated surfaces; avoid bends right at the tip.
How often should I calibrate?
Annually as a rule; at high temperatures, frequent cycling or QA-critical processes, more often. Track drift and apply offset via transmitter/PLC if needed.
How do I convert mV to °C?
Use a transmitter or software that applies the correct TC polynomial/table and CJC. Manual tables are suitable only for checks.
What are typical sources of error?
- Missing/inaccurate cold-junction compensation
- Wrong compensating cable or reversed polarity
- EMC pickup/ground loops → improve shielding/grounding
- Tip corrosion/embrittlement at high T → choose proper material/protection tube
What belongs in historian/reports?
Temperature (°C), status/diagnostics, alarms/acknowledgements, calibration/maintenance events; consistent units, UTC time base and versioning of transmitter parameters.
Do you support selection & commissioning?
Yes. We size sensors/protection tubes, select materials/types, provide calibration certificates and integrate—on request—into your IIoT dashboard with alarms and reporting.