Thermocouple Sensors


Sensor Technology is a key supplier of materials for the production of temperature sensors using noble metal thermocouples.

Our technical team is available to support our customers with wire specifications and thermocouple types according to the needs of each application.

In addition to the most commonly used wire diameters in the market, Sensor Technology also supplies other diameters on demand, which are more suitable for each application.

Thermocouple Sensors

The thermocouple type temperature sensors consist of two different wires (different metals and/or alloys) which, joined at one of their ends, produce an electric voltage. This electric voltage is directly related to the temperature, that is, at each temperature variation at the junction of one of the extremities, the electric voltage will present a proportional variation, thus making its measurement possible.

For there to be electrical voltage and therefore measurement, the joining of two metals of known properties should occur in the following way: 

One of the two ends of the two distinct joined wires are inserted into the environment to be measured (measurement junction or "hot joint"), while the other two ends are inserted into an environment with a known and controlled temperature (reference junction or "cold joint").


Thermocouples are divided into two groups:

- Basic Thermocouples (T,J,E,K): They are so called the thermocouples of greater general use in industry, because the wires are relatively low cost and its application admits a higher error limit.

- Noble thermocouples (S,R,B): They are those in which the pairs of wires are made up of a pair of noble metal wires such as platinum and rhodium. They are expensive and require high sensitivity receiving instruments, but present a very high accuracy, given the homogeneity and purity of the wires.

Sensor Technology is specialized in solutions for Noble Thermocouples, being able to provide products with the most diverse applications and specifications.

Types of thermocouples and their characteristics


 Alloy: (+) Platinum 90% Rhodium 10% / (-) Platinum 100%

• Temperature range: 0°C to 1480°C.
• Electromotive Force (FEM) produced: 0 to 15.336mV.
• Average thermoelectric power: 1.04mV / 100°C.

Application: oxidizing or inert atmospheres. Not indicated for vacuum applications and atmospheres with metallic vapors. Also used as a standard in the calibration of other thermocouples.


- Alloy: (+) Platinum 87% Rhodium 13% / (-) Platinum 100%

• Usage range: 0 to 1480°C.
• Electromotive Force (FEM) produced: 0 to 17.163mV.
• Average thermoelectric power: 1.16mV / 100°C.

Application: oxidizing or inert atmospheres. Not indicated for applications in vacuum and atmospheres with metallic vapors.


- Alloy: (+) Platinum 70% Rhodium 30% / (-) Platinum 94% Rhodium 6%

• Usage range: 870 to 1705°C.
• Electromotive Force (FEM) produced: 3.708 to 12.485mV.
• Average thermoelectric power: 1.05mV / 100°C.

Application: Oxidizing or inert atmospheres. Not indicated for applications in vacuum and atmospheres with metallic vapors. Type of thermocouple more stable and robust than the "S" and "R" types at high temperatures.

Tolerance classes

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The quality policy of Sensor Technology aims to increase its participation in the world market of platinum temperature sensors, offering the best solutions in care and products, through:

  • prompt service to its customers;

  • the continuous generation of profit to its shareholders;

  • reduction of costs;

  • continuous improvement of their processes;

  • the use of raw materials from qualified suppliers;

  • recognition and development of its employees.