From simple Type K process assemblies to precision noble-metal Type R/S/B sensors for furnace calibration and aerospace testing, Thermometrics manufactures thermocouples to ASTM E230 and IEC 60584 tolerances with same-day to 3-day lead times.
Thermometrics maintains stock of all standard thermocouple wire, sheath tubing, and connection hardware for rapid custom assembly.
| Type | Conductors | Range (°C) | Tolerance Class 1 | Tolerance Class 2 | Application |
|---|---|---|---|---|---|
| Type K | Nickel-Chromium / Nickel-Aluminum | −200 to 1260 | ±1.5°C or 0.4% | ±2.5°C or 0.75% | General purpose, oxidizing atmospheres |
| Type J | Iron / Constantan | 0 to 760 | ±1.5°C or 0.4% | ±2.5°C or 0.75% | Vacuum, inert, reducing atmospheres |
| Type T | Copper / Constantan | −200 to 370 | ±0.5°C or 0.4% | ±1.0°C or 0.75% | Cryogenic, food, moisture-present |
| Type E | Nickel-Chromium / Constantan | −200 to 870 | ±1.5°C or 0.4% | ±2.5°C or 0.75% | Highest EMF output of base-metal types |
| Type N | Nicrosil / Nisil | −200 to 1300 | ±1.5°C or 0.4% | ±2.5°C or 0.75% | High-temperature stability over Type K |
| Type R | Pt-13%Rh / Platinum | 0 to 1480 | ±1.0°C or 0.25% | ±1.5°C or 0.25% | Laboratory standards, furnace calibration |
| Type S | Pt-10%Rh / Platinum | 0 to 1480 | ±1.0°C or 0.25% | ±1.5°C or 0.25% | Freezing-point calibration, primary standard |
| Type B | Pt-30%Rh / Pt-6%Rh | 600 to 1820 | ±0.5% above 600°C | ±0.5% above 600°C | Extreme high temperature, glass industry |
Hot junction is welded to the sheath wall. Provides fastest response time and good vibration resistance. Suitable for most industrial applications except those requiring electrical isolation from the sheath/process.
Hot junction is isolated from the sheath by a MgO insulation plug. Electrically isolates the measurement circuit from the process and ground loops. Standard for industrial process transmitters.
Welded bead extends beyond the sheath tip, in direct contact with the process fluid or gas. Fastest possible response — common for gas temperature measurement in turbine test cells and exhaust systems.
Thermocouple element transitions from MIMS or wire to field-wiring extension wire via a terminal block housed in an aluminum or cast-iron connection head. Standard industrial installation format.
All thermocouple wire purchased to ASTM E230 lot-verified tolerances. Special limits of error available for Type K, J, T, E, and N where process accuracy demands it.
Standard configurations in the most common types and sizes are assembled and tested same-day. Simple assemblies typically ship within 24 hours of purchase order receipt.
Non-standard fittings, connection heads, and protection tubes are machined in-house. No sub-tier delay for custom hardware — one facility, complete fabrication.
Complete thermocouple assemblies with UL/CSA-listed explosion-proof connection heads for Class I, Division 1 and Division 2 hazardous locations.
Two independent thermocouple elements within a single sheath provide measuring and redundant/averaging channels. Common in turbine inlet temperature measurement and safety instrumented systems.
NIST-traceable EMF vs. temperature calibration available for all types. Mandatory for noble-metal Types R, S, and B used in furnace certification per AMS 2750 or CQI-9.
Talk directly to the engineering team that builds your assemblies. No bots, no call centers.