Type J
- Entire production made in Germany (100% handmade)
- German specialists (Employees have mostly been with the family business since it was founded)
- High quality and maximum of durability (high quality materials, better and experienced manufacturing)
- Custom-made production according to specific configuration within 1-2 weeks and according to your requirements
- Buy sensors & probes online including configuration + further scale of discounts on request
- Fast and reliable service - Our customer service team is available to assist you with expert support
- In-house technical development capabilities, including the ability to process and create CAD drawings and STEP files
Type J sheathed thermocouples for industry and mechanical engineering
The type J sheathed thermocouple is one of the most commonly used temperature sensors in industrial manufacturing. The iron-constantan pairing provides a high thermoelectric voltage and enables precise measurements in the range from minus 210°C to plus 760°C. Therma Thermofühler GmbH manufactures Type J sheathed thermocouples for mechanical engineering, plastics processing, and numerous other industrial applications.
The robust design of the sheathed thermocouple protects the sensitive thermocouple from mechanical influences and aggressive media. The stainless steel sheath completely encloses the thermocouple wires and the mineral insulation. This design allows them to be used in environments where open thermocouples would not survive. Therma offers type J sheathed thermocouples in all standard diameters and custom lengths. Our experience since 1991 guarantees consistent quality with every order.
Advantages of type J thermocouples in the medium temperature range
Type J sheathed thermocouples offer several advantages over other types in the medium temperature range. The iron-constantan pairing generates a comparatively high thermoelectric voltage of about 52 microvolts per Kelvin. This high sensitivity facilitates signal processing and enables precise measurements even with simpler evaluation units.
The material costs for Type J thermocouples are lower than those for precious metal thermocouples. This makes them an economical solution for applications that do not require extreme temperatures. When selecting the right thermocouple, the temperature range, the operating environment, and the required accuracy all play a role. Type J shows good resistance in reducing atmospheres and in a vacuum. The maximum operating temperature should not exceed 760°C continuously, as iron tends to oxidize above this limit.
Areas of application for type J sheathed thermocouples in manufacturing
Type J sheathed thermocouples have become the standard in plastics processing. Injection molding machines, extruders, and thermoforming systems typically operate in a temperature range between 150°C and 400°C. Here, type J thermocouples provide reliable measurements for process control. The fast response time enables precise temperature control.
In mechanical engineering and metalworking, sheathed thermocouples type J are used in heat treatment processes. Tempering furnaces, tempering baths, and preheating stations use the sensors for process monitoring. Type J thermocouples are also used in the food industry, for example in baking and frying processes. For customized solutions, Therma manufactures sheath thermocouples with special sheath materials and connection configurations according to your specifications.
Order type J sheath thermocouples in various lengths
Therma offers type J sheath thermocouples in flexible configurations. We manufacture the length according to your specifications, from a few centimeters to several meters. Diameters from 0.5 mm to 6 mm are available. Thinner sheaths react more quickly to temperature changes and are suitable for dynamic measurement tasks. Larger diameters offer higher bending stiffness for installation in systems.
The measuring point can be insulated, grounded, or free. For most industrial applications, we recommend the insulated version, which minimizes electrical interference. You can choose the sheath material to suit the application environment. Stainless steel 1.4301 is suitable for most applications. Alternative materials are available for higher temperatures or corrosive media. Thermal cables type J connect the sheath thermocouples to the evaluation electronics and ensure error-free signal transmission.
Request advice on sheath thermocouples type J
Therma Thermofühler GmbH will advise you on the selection and configuration of your type J sheathed thermocouples. Our technical team is familiar with the requirements of mechanical engineering, plastics processing, and the food industry. We manufacture in Germany and deliver quickly, even for custom-made products. Contact us for an individual quote at +49 2267 65850 or use the contact form.
