greetings from the drought state of Northern California. I'm on a well system here in the Sierra foothills, and the water table underneath us is beginning to dry up. Reports in the 3 mi circle around me are that 5 or so wells a week are drying up, so it seems that it is just a matter of time for me as we get into the summer.
I'd like to build a project that:
- detects the well pump turning on since current is flowing in the pump wiring from the control box
- send a simple notification over wifi to the wifi router in the home network that'll get written by the in house server into a db, a status of 1 and a time stamp
- detects the well pump turning off since there is no current flowing in the pump wiring
- send a simple notification over wifi to the wifi router in the home network that'll get written by the in house server into a db, a status of 0 and a time stamp
that is pretty much it, I don't need to know how much current is being drawn or have any sort of pump control - just is the pump on or off and what time did the state of the pump change. The overarching goal is to avoid a huge power bill and a pump replacement bill when the well goes nearly dry and the pump stays on all the time since pressure in the tank cannot be built and burns out. The in house server that the Arduino writes to over wifi will be setup to alert me to pump usage trend changes and once the usage shows that the pump is on more and more often I can head out to the pump shed and turn the system off and go to Plan B for water and leave the well unused till we're out of this drought.
What I'd like to find is some kind of clamp that will wrap around the flexible conduit to the pump that will in turn detect current in the line when the pump turns on by the control box and send a state change to the Arduino. There is about 4' of flexible line between the control box and the pump head to clamp onto that sends 240v down to the 2.5hp pump hanging at about 300' down the hole.
Feel like I've got a handle on the wifi and the overall programming, but hoping to get a product/part suggestion on the actual current detecting clamp device. I don't want to mess with the pump wiring with transformers or anything, which is why I'm focused on a clamp around the flexible conduit - just passive monitoring. Searching doesn't turn up much, but honestly I'm not exactly sure what I'm searching for and could use a pointer or 2. Simple is better.