Intermatic ST01C - In-Wall Timer
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Intermatic ST01C - In-Wall Timer

Heavy Duty - Astronomic - 42 On/Off Operations Per Week - White

Set it and forget it! The Intermatic ST01 is the perfect in-wall heavy duty astronomic timer. Designate your current time and date and the astronomic feature will automatically adjust this timer for sunrise and sunset times without the use of a photocell. This 1800 to 4155 watt rated timer can control a variety of electrical components including fluorescent fixtures, high wattage lamps, and electric motors. The white timer allows 42 ON/OFF operations per week with the option of 4 separate programming options for complex schedules. It also includes a lithium battery backup in case of power outages and features a manual override as well as a random mode for a lived-in look while away.


  • 42 ON/OFF Operations Per Week
  • Self-Adjusting to Sunrise/Sunset
  • 1800 to 4155 Watt Load Rating
  • 3-Way Switching Capability
  • Lithium CR2 Battery Backup
  • Digital Display
  • 4 Separate Programming Options


Stock Code:  ELEC-ST01
Part No.:  ST01C
Battery Backup:  (1) Lithium CR2
Finish:  White
Sold Separately:  Wallplate
Switch Type:  Single Pole & 3-Way
Brand:  Intermatic
UPC:  078275127562
Display:  LCD Digital Clock and Readout
Set Points:  42 On / 42 Off per Week
Switch Rating:  See Attached Spec Sheet
CSA Listed:  Certified



Customer Reviews

Rated 5 out of 5 by 2 reviewers.
Rated 5 out of 5 by Lights on, lights off - no sweat! This is a great improvement over the old Intermatic mechanical timers which had to have 'on' and/or 'off' times reset over the course of the year, as sunset (0r sunrise) varied. The times programmed onto its memory make this unnecessary. A great device and excellent application of technology. March 7, 2013
Rated 5 out of 5 by Love the Astronomical feature. Low cost and very flexible. May 20, 2012
1-2 of 2 Changing the way people buy lightbulbs