My Tunze Osmolator ended up with a broken sensor after a few years and instead of buying a new sensor I used it on a timer. I had it turn on 4 times a day for about 1 minute intervals on my 29g biocube. It did a great job and it only took me about 4-5 days to get the right number of intervals/time down.
The only weird thing about the timer is that for some reason the digital timers did not properly turn off the pump, it was only those timers where you have to manually set the tabs.
Hope that helps and I think it is a good idea so I say go for it.