Supplied with 3.1 and calibration certificates
Type J mineral insulated thermocouple cable
Type J mineral insulated thermocouple cable uses Fe-CuNi thermocouple conductors and is designed for temperature measurement from -210°C to +750°C. Type J is an economically priced thermocouple type with a smaller temperature range than several other thermocouple types. It is particularly suitable for reducing atmospheres and is commonly used for temperature measurement in industrial processes.
Type J MI thermocouple cable specifications
| Specification | Type J AerOpak® |
|---|---|
| Thermocouple type | Type J |
| Thermocouple conductors | Fe-CuNi |
| Temperature range | -210°C to +750°C |
| Insulation | MgO (+98% normal purity) |
| Standard diameters | 0.50–9.50 mm |
| Class | IEC EN60584 Class 1, ASTM E230 Special Limits or AMS2750 E |
| Manufacturer | Okazaki Manufacturing Company |
| Product family | AerOpak® |
| Certificates | 3.1 material and calibration certificates |
| Supply form | Coils or straight lengths |
| Minimum bending radius | 2× sheath diameter |
When should you use Type J MI thermocouple cable?
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 750°C. 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.
Kamet also supplies type J in bare thermocouple wire.
In which atmospheres can Type J be used?
Type J thermocouples are particularly effective in reducing atmospheres and can also be used for inert materials and vacuum applications. However, Type J is prone to rapid degradation in oxidising atmospheres above 550°C.
Our standard cable items
Type J mineral insulated thermocouple cable is available in various sheath materials and diameters. Standard stock configurations include AISI 304, AISI 316L, AISI 321, AISI 347 and Inconel 600. Additional configurations, including AISI 310 and AISI 316Ti, as well as other sheath materials and dimensions, are available on request. For the complete range of standard stock and custom made type J cable possibilities, visit this overview page.
| 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 | AISI316L | +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 |
Delivery times stated are for delivery to Kamet’s warehouse.
How can we help you today?
Request a quotation for the cable you need for your sensor.
Technical specifications of Okazaki AerOpak® Type J MI cable
- Available in IEC EN60584 class 1, ASTM E230 special limits or AMS2750 E
- Supplied according to IEC 61515 standards
- Includes a 3.1 certificate and a calibration certificate
- Raw materials sourced from Europe, America, or Japan
- Delivered as coils; straight lengths available upon request (with a bow or curvature)
- Wall thickness is a minimum of 10% of the cable diameter, per IEC61515; other specs available upon request
- Wire OD is a minimum of 15% of the diameter for simplex, duplex, and triplex, per IEC61515; contact for other specs
- Bendable around a mandrel with a radius twice the sheath diameter without sheath rupture or insulation resistance loss
- Sheath weldable, brazable, and solderable without insulation resistance change, with normal metal and thickness care
- Specific dimension tolerances such as h9 available on request, in line with the ISO system of limits and fits
Type J MI thermocouple cable supplied by Kamet
- We offer standard cables in stock with direct delivery.
- For non-stock items, the delivery time ranges from 10 to 18 weeks.
- Products are supplied in whole coils or pieces.
- As a customer, you can expect 24/7 access to our stock and prices via our digital portal.
- A multilingual team is always on hand to assist you with questions about standard or custom solutions.
Approximate Type J MI cable coil lengths
Coil lengths vary based on sheath materials. At the bottom of this page you will find a more detailed table with estimated coil lengths.
| Outside diameter (mm) | Φ0.25 | Φ0.50 | Φ1.00 | Φ1.60 | Φ3.20 | Φ4.80 | Φ6.40 | Φ8.00 |
| Manufacturing maximum length (m) | 150 | 290 | 425 | 165 | 600 | 260 | 145 | 90 |
Other products in this category
Quick overview of MI TC cables Kamet can supply
+ stock insight
Type K
NiCr-Ni thermocouples -270°C to +1260°C
Type N
NiCrSil-NiSil thermocouple -270°C to +1260°C
Type T
Cu-CuNi thermocouple -270°C to +370°C
Type E
NiCr-CuNi thermocouple -270°C to +900°C
Type S
PT10%RH-PT thermocouple -50°C to +1600°C
Type R
Pt13%Rh-Pt thermocouple -50°C to +1450°C