ATO - Level Sensor

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Travisr100

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Is it required to use the triple level sensor for the ATO or can a regular Hydros level sensor work? Pros and cons of each if so?
 
Two of the sensors are used for the one input and the third is there for the overfull notification if you can use it. So the bottom sensor going dry will trigger the input to dry. It will stay dry until the middle sensor goes wet and it then goes wet. The single optical sensor has just the one sensor that is either wet or dry but it is at the same level. So the triple level sensor mechanically add some more time between each top off event, but will need to add more during the event. So it will not cycle as much. You can use the minimum off time and minimum on time with a single sensor to about the same thing though.
 
This has been my experience exactly. With the triple level sensor the ATO was only running maybe 3 to 4 times a day and I saw more water drop than I care for between running. I switched to the optical single sensor and now it runs more like the Tunze I had. It's actually running TOO often. So, I went in and set the minimum off time to 30 minutes and the minimum on time to 30 seconds. I figured this would make it run less often. Unfortunately it seems to ignore those settings entirely. Unless I'm doing something wrong. See screenshots.

IMG_9214.png
 
I’m confused by these logs. I would expect to see turned on, running, and turned off. Why all these idle entries?

IMG_9220.pngIMG_9221.png
 
Mine has the idle statements also. Below that are my ATO output settings in the AWC output. I am using Sole pump at a flow rate of 55ml a minute. My minimum off time is just 5 minutes but it does not usually cycle on that often.

IMG_4276.png

IMG_4277.png
 
Travisr100 said:
Do you know what the idle entries represent?
Click to expand...
I don't know but have not paid a lot of attention to the log since the ATO is keeping mine at the high level sensor.

EDIT I got to looking and it may be when the sensor is wet but the minimum run time has not expired sine the ones I checked only run for the minimum on time I had set.
 
I see you made an edit to your post earlier and I was just about to say the same thing. It seems to go to idle when the upper sensor goes wet and the runtime hasn't expired. At least now I know what it represents.
 
Travisr100 said:
Why use the triple sensor then if the optical or a float switch work just fine?
Click to expand...
You can do things like have the skimmer turn off if the the triple sensor is in the overflow state. This would prevent the skimmer from overflowing if the level in the sump were to keep rising.
 
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