suppose an oil watchman type thing would do the job but they're
£60 minimum, and I don't need wireless comms, would prefer "off"
until "on for level check" to save power/batts.
The 6ft tall c.1200 litre tank is the other side of a wall from
where the gauge reading c/would be done, and it contains
Essentially I want to know when the tank is being over depleted.
It should refill constantly but if there's a supply issue,
measuring (even roughly) the level in the tank is the easiest way
to detect that issue and deal with it promptly before the tank is
Being able to check that it is full in the morning /last thing
would be sufficient I suppose...
Any ideas anyone?
On Tue, 7 Jun 2016 14:46:59 +0100 (GMT+01:00), jim <k> wrote:
One small hole in the top of the tank, sealed by a suitable gland, any power
supply from a couple of AA's to mains and a suitable lamp / led
Easily adjustable trigger point level in a matter of seconds. Will work
On Tue, 7 Jun 2016 15:33:37 +0100 (GMT+01:00), jim <k> wrote:
Yes, that's more or less it:)
The key thing is no need for electronics, no holes below the level of the fluid
/ in the wall of the tank, no pivots to seize up, a switch that will easily last
a few hundred thousand operations and everything is sealed. It's a fit and
RNIB do liquid level indicators. Just two probes and an fet on the front of
an oscillator apparently. Maybe if ful not full is all you need..
Other idea, is a simple float and lever on the spindle of a pot which is
part of a bridge circuit driving a plus or minus meter.
This newsgroup posting comes to you directly from...
On Tue, 7 Jun 2016 15:50:38 +0100 (GMT+01:00), jim wrote:
I like that as well, KISS.
But hadn't thought of that one...
Doesn't need another hole in the tank, just T into the outlet pipe?
Freezing would be a problem, the float switch is also pretty KISS,
until ice forms on the surface of the water but that won't happen as
much as a small bore pipe freezing.
On Thursday, 9 June 2016 17:52:35 UTC+1, email@example.com wrote:
I accept Jim thinks I'm as clueless as he is, and don't care. Idiots always think everyone else is equally idiotic. No, I'll stop there. In fact I won't come back to read his reply. There is nothing constructive to add.
A sensitive pressure gauge installed at the tap end should do the job by
measuring the head of water. Would only work when the tap is shut.
You "might" get enough adjustment range out of a washing machine water
level sensor. Older machines will probably have ones with adjustment
screws and you could add extra spring pressure to measure a few feet
rather than the usual few inches in a WM application.
Would work with battery, light and push to read on a KISS principle.
There have been numerous devices which use various forms of "light pipe"
such that, if the end is immersed, there is no reflection. I'd be amazed
if it weren't possible to set something up which let you shine a torch
down a lightpipe and see if light goes ot the tank and gets reflected so
that the end lights up (or not). Have several at different depths and
you can get an approximate indication of fullness.
Obviously, you could go for something a little more sophisticated than a
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