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. Suitable for high dust and high reaction sensitivity requirements.