Fine-diameter probes
Start with the required sheath diameter and insertion length. The current catalogue includes a nominal 0.5 mm miniature MI thermocouple.
0.5 mm miniature MI thermocouple ↗OSK · Since 1986
Custom & Fine-Diameter
MI Thermocouples
Mineral-insulated thermocouples, MI cable and custom temperature probes from Changzhou, China. Share your drawing, dimensions and operating conditions for a configuration review.
Miniature probes · Flexible structures · Custom configurations
For design engineers & purchasing teams
Specify the sensing point.
Build the right assembly.
MI thermocouple cable
Define thermocouple type, sheath alloy, conductor arrangement, supply length and the inspection requirements for your cable.
MI thermocouple cable ↗Available dimensions, tolerances, temperature limits and inspection documents are confirmed for the selected construction. Send a drawing to confirm the dimensions and performance needed for your application.
1986Our manufacturing roots
Ø 0.25 mmMiniature series diameters down to
In-houseMI production equipment development
Test labSupporting product inspection
Available combinations of diameter, thermocouple type and material are model-dependent.
Our core products
Small dimensions.
More possibilities.
Hot Runner Thermocouples
Temperature sensing in injection mold hot runners, nozzles and confined spaces.
Explore series ↗Miniature MI Thermocouples
Compact mineral-insulated probes for confined spaces, with measuring junctions and connections tailored to the application.
Explore series ↗
Multipoint Thermocouples
Multiple measuring positions in one assembly for temperature profiling in reactors, tanks, towers and furnaces.
Explore series ↗
Reduced-Diameter Thermocouples
A locally reduced measuring section for restricted installation spaces or applications requiring mechanical support.
Explore series ↗The product collection
Different structures.
The same attention to detail.
Type K Straight Probe Thermocouple with XH-2 Connector
Explore product ↗
0.5 mm Miniature MI Thermocouple
Explore product ↗
Bendable Type K MI Thermocouple
Explore product ↗
Integrated Multipoint MI Thermocouple
Explore product ↗
Flexible Spring-Loaded Thermocouple
Explore product ↗
Type E Screw-Mount MI Thermocouple
Explore product ↗Equipment · MI materials · Testing
We develop the equipment.
We make the material.
OSK designs and manufactures its own MI drawing lines and precision annealing lines. Equipment development and product manufacturing share the same foundation of materials and process experience.
Equipment developed in-house
MI drawing and precision annealing equipment built around our manufacturing needs.
High-density MgO filling
Attention to the uniformity and stability of insulation within the metal sheath.
An in-house test laboratory
High-voltage insulation, X-ray inspection and high-precision electrical testing equipment.
INSIDE OSK
Real workshops.
Manufacturing in view.
Production workshop
Production equipment and shop-floor work at OSK.
Equipment and workstations
Equipment and operating stations supporting everyday manufacturing.
Workshop overview
Manufacturing experience across wire and temperature sensing products.
Workshop photographs from OSK company materials.
MANAGEMENT SYSTEMS
Three systems.
One manufacturing commitment.
ISO 9001:2015
Quality management system
Certificate No.: 38526Q01050R053
Expiry printed on certificate: 2027-07-02
ISO 14001:2015
Environmental management system
Certificate No.: 38526E00524R053
Expiry printed on certificate: 2027-07-02
ISO 45001:2018
Occupational health and safety management system
Certificate No.: 38526S00480R053
Expiry printed on certificate: 2027-07-02
Issued by NSY Certification (Shanghai) Co., Ltd. These certificates cover management systems; scope is stated in each PDF. Validity is subject to surveillance audits and use with the Notice of Certification Audit Results, as required by the certificates.
Manufacturing since 1986
Experience, built over time.
From our beginnings in Changzhou to MI material drawing, insulation filling, custom structures and finished thermocouples. Our history is a continuing investment in manufacturing knowledge.
Our company history ↗Applications
Start with the conditions.
Find the right product.
Hot runners & molds
Probe dimensions, bend positions and lead routing for nozzles, molds and confined spaces.
Industrial processes
MI and multipoint sensing for temperature monitoring in reactors, tanks, towers and furnaces.
Precision measurement
Miniature probes, fine wire and RTDs selected for space, response and tolerance requirements.
Technical resources
Materials. Structures.
Specifications.
Explore the original product manual alongside our English product and selection information.
Product enquiries · Custom designs
Built around your application.
Talk to OSK about your operating conditions and installation.