This digital version can break down your "on" time into minutes. You can program up to 28 on/off settings and can even control the day of the week. This timer has a three prong grounded plug and 2 timed three prong grounded receptacles. Rated for 15 amps / 1800 watts resistive.

User Reviews about Intermatic DT620CL 15 Amp Indoor Astronomic Digital Timer

This is a really good electronic timer. It was easy to set up and works fine. I was looking for a alarm clock that I can set up for a whole week so that I wont be bothered in the morning on the weekends. Guess what, I am using this as my alarm clock now. I hooked up a pair of computer speakers to this which is connected to a cable box. And the cable box is set to my favorite music channel. So every morning I wake up listening to my favorite music. I have set the timer with different settings for Mon through Friday and for the weekends. They are also set to turn off after one hour. The cool thing is this can be used to have up to 21 different settings. I also have set up the speaker to turn off at 11.45 in the night. I can turn on the music by pressing the on off switch when I go to bed and don't have to worry to turn it off.
Great product and worked right out of the box.
-- Great Product

There are several secrets to programming this device. From reading the reviews you can tell that some people figured them out right away after reading the directions, some had difficulty, and some never figured them out and returned the device as defective.
Secret 1: OK doesn't mean OK. It means cancel the setting I just finished programing. To keep the setting you have to push PROG after setting the minutes.
Secret 2: An event is not an on-off cycle. It is just one time setting. To get an on-off you need to program two events. If you program an on time for event 1 and then an off time for event 1 you will find that the on time is gone. You can do on settings and off settings in any order. The device just executes the change of state when that time is reached for that day.
Secret 3: You have to push the ON/OFF button when you plug it in the first time after programming it. After that it operates by itself.
Secret 4: Dusk and dawn settings override time settings. I didn't set any dusk or dawn events so I didn't figure out the details of this one but if your device isn't going on and off when you expected it to, check your dusk and dawn settings.

If you plug a cord into the bottom half of the outlet it is then possible to plug in this timer at an angle at the top and it will still work. It is too big to go in straight if something else is plugged in. It is wide enough to take up three spaces on a power strip.

There is a three prong outlet on each side of this timer. Both follow the same program.

Once you figure out how to program it, this is an excellent timer. It has only been one day since I got the program working so I have no opinion on the durability of it. The secrets I listed are explained in the directions but obviously a lot of us didn't pick up on them at first reading. -- Secrets

This has been a great addition to our office. I have the under-sink mini water heater, and bottled water cooler hooked to this and only set it up once. It does the rest. It automatically adjusts for daylight savings time. -- Set it and forget it

This is the perfect timer, dependable and very solid. I currently have 2 timers, running 14 on/off cycles per day using all of the 28 programs "flawlessly". This timer is very easy to use and program, I "HIGHLY" recommend this timer 100%


Jerry G. -- REVIEW OF DT620CL

The set up is a little confusing but not that bad. Once set up the timer works great. My old one would not operate compact florescents or LEDs. This time does. -- Operates lights when needed