A Simple Single Channel Type k Thermocouple Temperature Measurement Design

Thermocouples are widely used in the field of industrial production and are characterized by their simple structure, durability and wide range of applicable temperatures. For the multi-channel thermocouple temperature measurement circuit design is relatively complex, and most of the designs do not have a USB interface, which may be inconvenient to use. This paper proposes a simple single channel type k thermocouple thermometer with USB interface, which can read the temperature data directly through the host computer software. A thermostatic bath was used to test the design, and the experimental results showed that the accuracy of the design was better than 0.08%, which satisfied the design requirement of not less than 0.2% accuracy.