Is the above device no longer available? I clicked on the “Buy” button but nothing happens except a brief page “blink” (and yes, my browser - Safari - allows pop-ups).
This product is currently out of stock and requires a 5 piece minimum order quantity. If you would like to purchase 5 or more pieces please let us know.
Thank you,
Travis Elliott
Dang! What’s the unit price Travis? Anything else in the product mix that might do the job?
What is the application exactly? Maybe this would work:
The application is quite simple Travis. It was discussed in a dialog here with you and others back last December. I want to be able to detect if a water pump is operating. I don’t really need to measure the actual current; rather just be able to detect if there is any at all.
My application - which you and i have discussed off and on over the years - involves turning a water pump in a well on or off as a function the water level in a large storage tank. Everything has been working great for a long time now except that once in a while the pump gets disconnected from power (Pumptec turns it off, its circuit breaker trips or lightning destroys the pump controller).
My application doesn’t currently know if the pump is running or not, only that is has “asked” it to turn on via contact closure. It usually takes about 1-1/2 hours to refill the tank when the float switch in the tank calls for more water but if it is still ‘asking’ for water after 2-1/2 hours, my app sends out an alert via email and/or text. At that point, we don’t know if there is a massive leak in the water distribution system, someone has left a shower or something else on for a long period or the pump isn’t actually running. The ability to monitor the current on the wires feeding the pump would allow us to determine if the problem is related to the pump itself and, if so, point us in the right direction for further problem identification and resolution.
If there was some kind of device that would simply provide contact closure if there is current and open a circuit if there isn’t, that’d be an extremely simple solution (simpler than measuring current I suspect); just wire the thing to one set of GPIO ports on our NCD relay boards and monitor that circuit in firmware.
Hi Brian,
Ok. I remember this. What board do you currently have installed at the pump house? Isn’t it something like a relay board with an IoT interface and a Particle or ESP32 module installed? Does it have available GPIO lines? If so you could use a digital CT with a variable trip. Something like this:
https://www.veris.com/995242/product/veris-h608-current-switch
Essentially you can adjust the current level threshold(say 20 amps) and if the current goes above that set point the CT closes a contact, then once the level goes below that threshold the contact opens. For what you are describing it sounds like this would work.
Thank you Brian,
Travis Elliott
Yes, NCD relay board with attached Particle Boron. Two of them, actually, in parallel. None of the GPIO lines are currenty in use, just one relay per board. The gizmo that you suggest should, indeed, work; perfect, in fact!
I’ll let you know what happens (but I would have liked to gve NCD another buck or two since you folks have been such a great resource over the years).
We carried those Veris sensors at one time but didn’t sell that many of them. They’re out of stock on our site but I actually still have a few laying around in inventory. I have these:
Would any of those work?
I found the H608 on eBay for $20!!! Ordered it.