Type J, Fe-CuNi thermocouple is a widely used thermocouple junction. In general, it is economically priced and it has a smaller temperature range compared to other thermocouple junctions: -210°C to +750°C.
Our Okazaki’s mineral insulated cable AerOpak®cable is world renowned for its accuracy and quality. AerOpak®cable is:
| Thermocouple wire | Sheath material | MgO Insulation | Class | Outside Diameters | On stock | |
|---|---|---|---|---|---|---|
| Type J | AISI 304 | +98% Normal purity | Class 1 | 0.50 mm to 9.50 mm | Various diameters on stock | Send inquiry |
| Type J | AISI316(l) | +98% Normal purity | Class 1 | 0.50 mm to 9.50 mm | Various diameters on stock | Send inquiry |
| Type J | AISI321 | +98% Normal purity | Class 1 | 0.50 mm to 9.50 mm | Various diameters on stock | Send inquiry |
| Type J | AISI347 | +98% Normal purity | Class 1 | 0.50 mm to 9.50 mm | Various diameters on stock | Send inquiry |
| Type J | Inconel 600 | +98% Normal purity | Class 1 | 0.50 mm to 9.50 mm | Various diameters on stock | Send inquiry |
Type J mineral insulated cable is also possible in AISI310 or AISI316Ti, and more sheath materials in your needed outside diameter. For the complete range of standard stock and custom made type J cable possibilities, visit this overview page.
| Sheath outer diameter (mm) | Φ0.25 | Φ0.05 | Φ1.00 | Φ1.60 | Φ3.20 | Φ4.80 | Φ6.40 | Φ8.00 |
| Manufacturing maximum length (m) | 150 | 290 | 425 | 165 | 600 | 260 | 145 | 90 |
The Type J thermocouple stands out for its affordability and efficiency in temperature monitoring of inert materials, vacuum applications, and hot processes including the manufacturing of plastics and resins. It is particularly effective in reducing atmospheres.
It exhibits resilience to aging, despite this, it is prone to rapid degradation in oxidizing atmospheres above 550°C. The thermocouple’s maximum sustainable operating temperature is approximately 800°C, but it can withstand up to 1000°C for brief durations. The minimum working temperature is set at -210°C; however, users should be cautious of condensation below ambient temperatures, which can lead to rusting of the iron component and low temperature embrittlement.
It should be noted that the accuracy of Type J may be significantly compromised if used above 760°C, and its use is not advised in damp environments or for low temperature monitoring due to oxidation concerns.
Do you have any further questions? Please let us know and our specialists will be happy to advise you.
