Micro Thermocouple: A micro thermocouple operates based on the Seebeck effect, where two dissimilar metals joined at one end generate a voltage that correlates with the temperature at the junction. The miniature structure allows it to detect localized heat changes with high responsiveness.
Micro RTD (Resistance Temperature Detector): A micro RTD measures temperature by monitoring the resistance change of a thin platinum wire or film. As temperature increases, the resistance increases in a predictable manner. Micro RTDs provide high accuracy and repeatability, especially at lower temperature ranges.
Materials and Structure
Sensing Element:
Thermocouple: Fine wires of K, J, T, or E type alloys
RTD: Thin-film or wire-wound platinum (Pt100 / Pt1000) elements
Sheath & Insulation:
Outer sheath: Stainless steel, Inconel, or Teflon-coated for chemical protection
Insulation: Mineral Insulated (MI) cable, ceramic, or PTFE depending on application
Lead Wires:
Ultra-fine enameled copper, fiberglass, or Teflon insulated conductors for compact routing
Tip Size:
Probe diameters as small as 0.25mm to 1.5mm, making it ideal for embedded or surface measurements
Applications
Semiconductor equipment
Medical devices and instruments
Miniature motors or bearings
Aerospace systems
Precision mold temperature control
Battery pack temperature monitoring
Microscale scientific experiments
Embedded electronics or circuit boards
Advantages
Ultra-compact, suitable for tight or confined spaces
Fast thermal response for real-time monitoring
Compatible with data loggers and PLCs
Customizable probe length, connector, and wire type
