A temperature and humidity sensor is a type of sensor that is equipped with humidity and heat sensitive components. It uses a temperature and humidity integrated probe as the temperature measuring element to collect temperature and humidity signals. After being processed by circuits such as voltage stabilization filtering, operational amplification, nonlinear correction, V/I conversion, constant current, and reverse protection, it is converted into a 485 or 232 interface output directly through the main control chip with temperature and humidity. Temperature and humidity sensors are widely used in various fields of production and life due to their small size and stable performance.