The Intermatic Heavy Duty timers are great all around timers. They have trippers that you pull up to turn the device on. With a 15 minute resolution, they are great for CO2 and pump timing applications. They will handle up to 15 amps which makes them very good timers for lighting. Both have a manual override to allow you to turn them on or off without changing the current timing. Available in 2 versions, grounded and non-grounded. They are very reliable timers.
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