I have to agree with both of these statements as in some water pumps there is no mechanical connection between the impeller & the rotorI would say that's actually the best solution - since, in the final analysis it is presumably water flow which actually matters to the OP.
One can (despite winston's attempt to confuse) use electrical methods to detect whether or not the pump motor is running fairly normally but, at least in theory, the fact that a pump's motor is functioning normally does not guarantee that water is being pumped satisfactorily (anywhere, or to where it is meant to be being pumped).
Kind Regards, John
Ah! Well, I suppose you could just read the 'flow sensor' I suggested as meaning 'air flow', rather than 'water flow' - but suitable sensors might not be quite so easy to find. However, given ...The treatment plant has an air pump not a water pump so perhaps some of the solutions may not be effective?
it sounds as if you could not contemplate any sort of remote sensor.I had thought of using some sort of current monitor but I guess that would need a separate cable which is not practicable.
Do you mean that the pump is then switched off (electrically)? If so, the disappearance of current being drawn could certainly be sensed 'at the other end'.Should have mentioned that there's a sacrificial pin that breaks in the event either of the air pump diaphragms break. The pump then stops.
he treatment plant has an air pump not a water pump
Such as this company: https://www.ecproducts.co.uk/product/air-differential-pressure-switch-50-500pa-930-83/As Bernard said...using the air pressure might be the simplest method.
Knock up a simple water gauge (manometer) to measure the air pressure (and to see whether it fluctuates and may require damping).
Then use an adjustable air pressure switch (eg. look at Honeywell or Huba often used in boilers).
The appropriate APS contacts could switch on a flashing Led mounted such that it could be seen with a quick glance at night.
Alkaline batteries would be long lasting.
For once, your guess was imperfectI'm guessing the OP has long gone.....
I would suggest that you should probably start by deciding exactly what 'failure mode(s)' you want to be able to detect (pump motor failure, blocked/broken/leaking air lines, inadequate air pressure etc. etc.) and then work from there.Ummmmh. 'Knock up a simple manometer...' The solutions all sound fascinating and I've got time on my hands at the moment but I'm just a DIYer with no electrical training. I was really hoping for a simple plug in device but that doesn't seem possible. I'll mull over the suggestions and try to figure out if I'm up to the job!
Ummmmh.I'm just a DIYer
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