XIQI Electric CG-WRNT-02 K-Type Thermocouple Sensor, M6 Thread, 3M Cable

This Type K thermocouple produces a low-level DC millivolt (mV) signal proportional to the temperature difference between its probe tip and reference junction. This raw mV output must be connected to a compatible temperature controller, transmitter, or data acquisition module that provides signal amplification, linearization, and essential Cold Junction Compensation (CJC) to display an accurate absolute temperature reading.

No, you cannot connect it directly. The thermocouple's mV output is too small and requires specialized signal conditioning. You need an external thermocouple amplifier module (like a MAX6675 or MAX31855 for Type K) that handles cold junction compensation and provides a digital interface (SPI) compatible with microcontrollers. The sensor's bare wires would connect to this module, not directly to the GPIO pins.

The M6 metric thread allows for secure, mechanical mounting directly into a tapped hole in a process component, such as a heating block, mold, or pipe fitting. It can also be screwed into a separate thermowell. This design ensures excellent thermal contact for fast response times and keeps the probe firmly in place, even in high-vibration industrial environments.

This specific CG-WRNT-02 model is rated for a continuous temperature measurement range of 0°C to 600°C and comes with a fixed 3-meter integrated cable. Exceeding the 600°C limit may damage the probe insulation and affect accuracy. The 3-meter length is sufficient for most installations; for longer runs, it's recommended to use extension wire of the same Type K classification to maintain signal integrity.