NW, the timer you are looking for is Tork (I think they bought out Intermatic some time ago, and my rep says this is the cross to the older Intermatics).
I have 6 of them in service and they are like night and day from older units to the new replacements.
Tork ACT30M 30 Minute Adjustable Cycle Timer, 1/2 min. increments' Look around for better pricing, but this is close to what I paid over a year ago. Bulletproof...nice timing device. http://www.globalindustrial.com/p/elect ... r-fs-box?u
This link is broken, either the page no longer exists or there is some other issue like a typo.