How to automatically measure duty cycle of an AC device?
January 11, 2014 11:11 AM Subscribe
I have a mains-powered pump which switches itself on and off automatically depending on water level. I want to monitor the duty cycle of this pump (how long it is on for, and how long it is off for) without having to manually watch the pump and use a stopwatch. Is there some device that I can use to monitor the duty cycle automatically (for example, an intelligent socket that I could plug the pump in to)? It would need to have a readout that told me the length of the last OFF and ON periods (remote monitoring via wifi would be ideal). Alternatively, what would be the easiest way to build such a device? I'd be competent to investigate Arduino or Raspberry Pi based solutions, for example.