I hate to plug my own products, but I thought i'd chime in here because I went through a lot of timers before arriving at
this one.
Problem with Hardware store digital timers is that they rely on watch style battery. When that battery is drained (may take few months, a year or two but will happen!), there isn't enough current to trip the relay - your misting system can stay on 'forever' until you manually turn it off. Not sure why this is the design, esp that the timer is constantly plugged into a socket, but that's just the way it is. This is the sole reason I tell everyone not to use these for misting systems. It's OK if you have it connected to a lamp...no big deal if one day the lamp doesn't turn ON or OFF, it's different if you have a 5 gal bucket full of water connected to a misting pump. Also, the programmed ON times are set on per minute basis. (smallest ON interval is 1 minute) .
Repeat cycle timers can do seconds, true, but for whatever reason are much more expensive than other timers (don't even have a digital display!). Problem is that all the cycles are the same, which in my opinion is crap. I for one, don't want to mist my animals same intervals throughout the day. The photo cell is a nice idea if you use in a green house, but what if you have your animals in the living room and the TV flickers and you put the lights on and off all the time? The timer then thinks it's day and starts cycling again...so you put it in a drawer and turn photo cell off - then it cycles 24hrs per day, so then you plug in the expensive repeat cycle timer into a cheap hardware store timer and you set on time at 8am, off at 8pm to keep it from coming on when the lights are on in the room ...sigh...I've been there
our timer can
- run 8 different intervals (from 1sec to 1 week)
- it can run it at specific hrs of the day/week/other day/weekend etc (ie. 8am 24sec, 10:32am for 2 min and 17 sec... it can also do certain timings say every other day...so if you want to give a major shower to your chameleon every onther day you can.)
- it has a rechargable battery which keeps the timer operational and reduces the relay triggering problem associated with other digital timers.
-UL listed
if I find a better timer I'll start stocking it, but for now that's the best I found for a misting system.