🚀 go-pugleaf

uchrgrh@Msu.oscs.montana.edu writes:
>I would like to build a solid state device that would turn off a water
>pump in my aquarium if the water level drops  below a certain level.
>I am willing to look at prefabricated stuff but would prefer to build it
>my self.
>I would like to put the level sensor on the prefilter which hangs over 
>the back of the tank and the rest of circuit in the cabinet below the tank.
>The reason for the circuit is mostly to save the pump, which relys on water 
>for lubrication, shoud it start to suck air.

If you don't want electrodes in the water, I have a pressure switch that 
will work.  Normally open, closes when there is higher than ambient pressure.
You could have it for $5 or so.  It seems to be intended for gases, but is
definitely water-tight.

Regards.
-- 
Scott Hanson		This has been a recording.
despair@netcom.com