Thermocouple Wires

Temperature is a crucial metric in many industrial processes. Under high temperatures or aggressive environmental conditions, non-precious materials quickly reach their limits.

Thermocouple Wires

Temperature sensors based on precious metals demonstrate outstanding resistance to corrosion, thus guaranteeing long service life and reliable measurement accuracy.

For measuring high temperatures of up to 1700°C, thermocouple wires made of high-purity platinum or platinum/rhodium alloys are therefore the solution. The thermocouples made of these wires are used for measuring exact temperatures in the steel and semiconductor industries, for example.

Thermocouple wires from Heraeus are distinguished by their particularly high purity and demonstrate outstanding long-term stability.


Thermocouple wires from Heraeus offer a solution for exact measurement results for the thermocouple in a corrosive environment. The precious metal wires withstand temperature measurements from 800 to 1700°C.

Overview of your advantages:

  • Proven materials for temperature measurement
  • High purity and thus highly accurate measurement results
  • Resistance to corrosion and outstanding long-term stability
  • Manufacturing of the thinnest thermocouple wires < 35 µm
  • Waste material reclaimed/accepted for a credit to your precious metal account
  • Individual customer consultation by experts with years of experience


  • Steel industry
    Depending on the specific application, metallurgical composition for the optimization of heat control such as in electrically heated steel furnaces and for manufacturing high temperature sensors used in foundries and in steel making
  • Glass and ceramics industry
    Temperature measurement in siphons or feeders using rod sensors with three or five measurement points: Manufacturing roof and floor sensors for glass melting furnaces in the direct melting or boosting processes
  • Metal-processing industry
    Depending on the specific application, metallurgical composition for the optimization of heat control such as in electrically heated hardening furnaces: Manufacturing high temperature sensors in metal processing
  • Energy supply
    Contact sensors for open flames: Manufacturing temperature sensors with K1 approval in accordance with EDF technology for use in the primary circuits of nuclear power stations, temperature sensors in conventionally fired boilers
  • Automobile, aerospace, railways (Transport & conveyance)
    Manufacturing vibration resistant mechanical temperature sensors in vehicles for use on land, on water, and in the air
  • Pharmaceutical and food industries
    For all production steps with special hygiene regulations: Manufacturing temperature regulators resistant to humidity and pressure
  • Electronics industry
    Manufacturing spikes for the semiconductor industry, temperature measurement in the diffusion treatment of wafers
  • Laboratories
    Calibration equipment such as furnaces, probes, and triple-point cells
  • Chemical and petrochemical industries
    For the measurement of temperatures in pressure vessels, pipelines, etc.: Manufacturing rod sensors in single, double, or multiple-point versions

Product properties/technical data:

Thermocouple wires from Heraeus are available for S, R, and B type thermocouples.

Tolerance classes In each case, the higher value is applicable [t = temperature in °C]
Class 1 ± 1 °C or ± {1 + (t - 1100) x 0.003} °C
Class 2 ± 1.5°C or ± {0,0025 x t} °C
Type Class 1 Class 2
S x x
R x x
B x
The temperature scale used in IPTS 1968 with the following fixed points:
zinc point 419.58°C
gold point 1064.43°C
palladium point 1554°C
platinum point 1769°C