TECHGROW - HUMI HEAVY - HUMIDITY CONTROLLER - (SENSOR NOT INCLUDED)** This product comes without sensor, sold separately ** Available sensors: humidity and temperature sensors (article code 12001) Designed with heavy duty components to control powerful humidifiers and dehumidifiers. Its smart software allows for easy switching between humidifying and dehumidifying the air to precisely maintain the ideal humidity level for your room ? adjustable from 10% to 90% relative humidity. Easy to use, its clear LCD screen