Temperature and humidity controller: the temperature and humidity controller is based on the advanced single-chip microcomputer as the control core, and adopts imported high-performance temperature and humidity sensors. It can simultaneously measure and control the temperature and humidity signals, and achieve LCD digital display. It can also set and display the upper and lower limits of temperature and humidity respectively by pressing keys, so that the instrument can automatically start the fan or heater according to the site conditions, and the actual temperature Equipment for automatic humidity regulation.