Measuring liquid level in a distant tank

I 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 water.
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 emptied.
Being able to check that it is full in the morning /last thing would be sufficient I suppose...
Any ideas anyone?
TIA
--
Jim K


----Android NewsGroup Reader----
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Tue, 07 Jun 2016 14:46:59 +0100, jim wrote:

Is running a small pipe through the wall then vertical clear pipe up the wall too simple?
Main problem would be periods of sub zero temperatures.
Cheers
Dave R
--
Windows 8.1 on PCSpecialist box

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Tue, 7 Jun 2016 14:46:59 +0100 (GMT+01:00), jim <k> wrote:

http://uk.farnell.com/triton-controls/lr03-l05m/float-switch-5m-cable/dp/7064263 http://uk.farnell.com/triton-controls/lr03-w/weight-lr03-lr06/dp/7064287?MER=en-mer-0713-pd-r2-acce http://www.farnell.com/datasheets/316999.pdf http://www.farnell.com/datasheets/34724.pdf
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 'forever'
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
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 forget solution.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
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. Brian
--
----- -
This newsgroup posting comes to you directly from...
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Tue, 7 Jun 2016 15:50:38 +0100 (GMT+01:00), jim wrote:

up

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.
--
Cheers
Dave.
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Tue, 07 Jun 2016 14:46:59 +0100, jim wrote:

Some sort of (dayglo) stick on a cork ?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 07/06/16 14:46, jim wrote:

transparent plastic pipe through a hole in that wall?
i.e remote sight glass.

--
Truth welcomes investigation because truth knows investigation will lead
to converts. It is deception that uses all the other techniques.
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

I know you said no electronics but there is an Instructable for a project using an Arduino and a cheap ultrasonic sensor: http://www.instructables.com/id/Measuring-water-level-with-ultrasonic-sensor/
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 07/06/2016 20:21, Lee wrote:

A length of plastic pipe, an end cap, a couple or more reed switches and a magnet on a float sliding up and down the pipe?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Tuesday, 7 June 2016 20:22:02 UTC+1, Lee wrote:

Talk about doing it the hard way. This is a beginner bulb & battery level electronics exercise.
Did you get that lightswitch wired in yet?
NT
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 08/06/2016 13:48, snipped-for-privacy@gmail.com wrote:

Depends on you POV, the author already wrote the code and (clone) 'Duinos and the sensor used are dirt cheap. Plus it met both the "push to read" and actual water level remit :)

If that was directed at me, what lightswitch?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Wednesday, 8 June 2016 20:06:05 UTC+1, Lee wrote:

It can be done easily for nothing with household electronic scraps. Arduinos aren't that cheap. And no, I won't be telling Jim how. If he thinks he knows what he's doing he can figure it out or not.

No, Jim. He made that job far harder that it need be too.
NT
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 08/06/2016 23:45, snipped-for-privacy@gmail.com wrote:

Sigh, another interesting thread degenerating into a waste of space because of willy waving - c'mon chaps, nothing is gained by this.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Thursday, 9 June 2016 17:52:35 UTC+1, snipped-for-privacy@thanks.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.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
jim wrote:

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.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 07/06/2016 2:46 PM, jim wrote:

A metering stick on a hollow ball that protrudes from the top?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Tuesday, June 7, 2016 at 2:47:02 PM UTC+1, jim wrote:

http://www.milinst.co.uk/shop/TP/TP.php
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 07/06/2016 14:46, jim wrote:

Optical.
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 torch...
--
Rod


Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Related Threads

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.