Dave discussed his misting setup inside a greenhouse, seven months ago.. He used a battery-operated, hose-end timer with "Tornado" misters:
Greenhouses forum: Automatic valves for misting systems
The thread "Automatic valves for misting systems" in
Greenhouses forum
MEBARB Press-Fit Barb (connects to the tubing) $0.10
MEAD Anti-Drip Device (stops the dripping after the water shuts off) $1.20 each... Expensive!
MTFBPR Tornado Misters (connects below anti-drip device) $0.48 each
http://garden.org/thread/view_...
Note that the anti-drip gadget was more expensive than the mist nozzle.
