... finally, an alternative!
BioControls.com Seen On TV Discovery Ch History Ch NSF NASA
Description: Solid State Repeating Timer for Aeroponic Seed Germination, Cutting Propagation and Continious growth. Designed to control short burst spray 3 second or 6 second durations and extended spray interval operation - repeatable non-stop operation 24hrs/7days.
Features: The digital timer features accurate spray interval and duration for an extended list of plant species. Stand-alone repeatable feature includes settings switch panel the interval and duration to match a wide range of plant/environmental requirements. Connect to any 24-VAC (1 amp) solenoid.
Available settings: Interval between sprays (3 to 120 minutes) and spray duration (3 and 6 seconds). Pefect for greenhouse or indoor operation. No computer required.
Includes: 24VAC transformer (1A). Features auto-reset upon power interruption, LED indicator status lights and 24V (1A) ouput connector cable (with wire nuts).
Size: 2.5 inch x 5 inch x 3 inch (6.4 cm x 12.8 cm x 7.2 cm)
Warranty: 90-Day Limited warranty