SL1900H humidifier controller is an electrode humidifier controller with high integration, cost performance and stability. the controller has strong anti-interference ability, is designed in accordance with EMC A-level standards, and can be used in places with harsh conditions such as steel mills and paper mills. the control mode of the controller can be external switch, external proportional, potentiometer adjustment or direct humidity sensor control. the accuracy of proportional control is very high and can meet the control requirements of high-precision centralized air conditioning humidification and constant temperature and humidity systems.