Temperature sensor for soft ­soldering

May 2018 Sensors & Transducers

For most temperature acquisition applications, platinum-chip temperature sensors are used. Manufacturing these sensors is a complex and technically demanding process. Specialist in this field, Jumo, has been making the small devices for many years under clean room conditions and now offers a new model with gold plated nickel connection wires.

Particularly suited for soft soldering applications, the Jumo PCA EG (economic gold) is also suitable for all other common processing methods. The sensor is designed for operating in a temperature range from -70 to 500°C. Numerous designs, such as Pt100, Pt500 or Pt1000 are available as standard, while special nominal values can be manufactured upon request.

During manufacturing, the platinum layer of the sensors is applied to a ceramic body and subsequently structured in a photolithographic process. Fine adjustment is carried out in a laser trimming process. A special glass layer is then melted on to protect the sensor against external influences and to provide insulation. The electrical connection is enabled through welded on connection wires. These wires can vary in both length and diameter. An additional glass layer applied to the contact surface fastens the connection wires and acts as a strain relief.

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