Overview
Type-K Thermocouple with Glass Braid and Stainless Steel Tip is a simple, high-temperature sensor probe designed for measuring temperatures well beyond the range of typical semiconductor sensors. It uses a welded K-type thermocouple junction and a stainless steel probe tip, making it suitable for measuring air or surface temperature in demanding environments.
Unlike low-cost probes with vinyl insulation that can soften or melt at elevated temperatures, this version uses glass over-braiding / fiberglass braid for better heat resistance. The probe is rated up to 500°C (900°F), which makes it a practical choice for ovens, heaters, kilns, boilers, HVAC systems, and similar applications.
This thermocouple contains no built-in electronics, so it should be used with a suitable interface or amplifier such as the MAX31855, AD8495, or MAX31856.
Important: the thermocouple tip is electrically connected to the steel probe, so it is not suitable for measuring conductive surfaces or objects that may carry electrical charge.
Specification
Technical details for Type-K Thermocouple with Glass Braid and Stainless Steel Tip.
| Specification | Details |
|---|---|
| Thermocouple Type | K type |
| Insulation | Glass over-braiding / fiberglass braid |
| Temperature Rating | Good up to 500°C (900°F) |
| Cable Length | 1 meter |
| Probe Tip | 2 cm long stainless steel probe |
| Lead Identification | Color-coded wires |
| Construction | Welded thermocouple junction, no internal electronics |
Connections & Use Notes
| Lead | Type | Description |
|---|---|---|
| Positive | Thermocouple lead | K-type positive lead; wires are color-coded for identification |
| Negative | Thermocouple lead | K-type negative lead; connect to a compatible thermocouple amplifier/interface |
The output voltage from a thermocouple is extremely small, changing by roughly 50 µV per °C, so direct measurement can be difficult. For reliable readings, use a dedicated thermocouple interface chip that handles amplification and cold-junction compensation.
There is a small piece of heat shrink at the connector end to help keep the fiberglass braid from fraying during handling.
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