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RE: RE: Fish Tank Automation
- To: <ukha_d@xxxxxxx>
- Subject: RE: RE: Fish Tank Automation
- From: "Ray Barnett" <lists@xxxxxxx>
- Date: Mon, 1 Jul 2002 22:49:54 +0100
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
Stuart,
I
have
a Tunze water top up system. Cheating I know to buy one rather than build
it
(cost £100), but I wanted something reliable and easy. Anyway, the
good bits of
it that you might want to replicate:
It
uses an optical sensor to detect when the water level drops - which
presumably
gives it greater sensitivity over a float sensor.
It
uses a float sensor to check for an overflow situation - intended to
shutdown the top-up pump if the "low water" sensor fails for some reason
and
erroneously decides the tank needs filling.
The
system also shuts down the power to the pump should the tank fail to reach
level
within ten minutes. This save guards against the top-up system running out
of
water and running the pump dry, and is also handy should the pump ever get
air
locked.
Finally the kit comes with a nice rail that clamps to the side of
the
tank and holds all the sensors neatly in place.
Are
you sure an airpump can supply enough pressure to push water out of the
barrel
up to the tank? And are you sure that you can seal the barrel well enough?
The
water pump on my system is very effective, with the only downside being
that it
is noisy. You can buy the Tunze top-up pump as a spare for between 10 and
20
pounds AFAIK, so I would use either that or a very small powerhead.
HTH,
Ray
Barnett
For more information: http://www.automatedhome.co.uk
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