Poor customer service from autotopoff. I’d heard good things about them but it seems like they could’ve done a better job and kept a customer in your case. Glad to hear you like this ato better. I use the Tunze 3155 and except for one little hiccup at the very beginning, most likely due to operator error, it’s been rock solid. ATO is one of those things you just want to set and forget.3/31/20 Update: IM Aqua Gadget Titanium ATO
Have been looking at alternatives to autotopoff.com devices as I recently got an ATO from them that worked for a total of 5 or 6 days before the relay went out. I was never satisfied with their response that was basically 'Yep, probably the relay - you send it back, we'll fix it and then ship it back to you.' Total crap of a response to a defective unit pretty much out of the box. So instead of sourcing the relay and fixing myself, I decided to give the new IM ATO device a try.
I ordered it from BRS, and their free shipping using Spee Dee usually gets to me the next day. It shipped yesterday from BRS and it was on my doorstep at noon today. Nice box, not the greatest internal packaging, but it arrived in good order and everything was intact.
The ATO comes with dual level detection devices that are actually conductivity probes. One lead of each probe sends out a small voltage (5v) and, if the probe is submerged, that will complete a circuit as it is picked up by the second lead (thanks to salt water being quite conductive) and the voltage is then detected by the controller box for the processor to interpret. Both probes are mounted on waterproof magnetic mounts. One thing I can say right away is that the magnets in these mounts should be *much* stronger. You could easily move one (or both) of these magnet mounts while doing work in or near the back chamber. Very strong magnets are pretty dirt cheap these days, and the sensor locators are not the place to skimp a buck or two on subpar magnets. They work, the sensors are certainly not going to fall off of the glass, but I want magnets that are strong enough that effort needs to go in to moving them.
And that's it really. The control box has four cables coming out - a power cord, the two sensor wires (with disconnects - that is nice), and a short beefy three prong wire to power your return pump of choice. Simply put the sensors where you want them, use the suction cups to help secure the wires, plug in your pump, and power on the device. You don't have to know which is the lower and which is the upper sensor - the board is smart enough to figure that out on its own.
You can see the lower sensor on the right in this image submerged and the water just barely touching the upper sensor at the left.
I'm using a maxijet 900 right now because these stupid pumps are loud - and I want the auditory reminder that the pump is going. I will also be using my smart power strip to power this device on just twice a day for 2 minutes at a time. I like redundancy. If my smart power strip fails, the sensors will still operate and vice versa.
Setup was super easy, and so far the only thing to note that is not the best are the magnets in the sensor holders. But - with the suction cup wire holders in place, there is probably less liklihood of the wires sensors being easily moved. Again, the magnets are not super weak - but they certainly could be stronger. Plugged it in and it worked exactly how it was supposed to. I like the sensors - conductivity sensors are rock solid and should last for a good, very long service life. And the price is right - it's currently $69.99 at BRS - although you do need to supply your own pump.
I've got high expectations for this device, but quality looks good, and setup was really simple.