I have a few like that myself, I think the switch is digital on the ones that don't turn back on. One with an analog switch will usually work but they are becoming less common. the crane humidifiers,Cheap holmes fans available on amazon turn on and off with my timer. My Vernado tower fan needs to be manually turned back on every time while my lasko & ultrateck fans work with a timer. Most inline fans come with a controller that will switch on and off as needed.