need help w/ tunze osmolator

[ALang]

Could very well be. I have one of the ATO, and mine works great almost from the get-go.
The only problems was due to me, trying to level the sensors (On the magnet), so that it could read correctly. Then I had the filling tube under the sump water level, so it kept back-siphoning until the alarm went on.

After I leveled out the sensors and cinched up the tube to three inches above the water level in my sump, it ran perfectly since.

If you have done all of the about suggestion, and it still malfunctions, I'd return it for another one.