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Model #ST01K

Store SKU #1002280764

15 Amp 7-Day Indoor In-Wall Astronomic Digital Timer, White

$5320
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  • Versatile 7-day programmable schedules with upto 40 ON/OFF events
  • Astronomic clock feature determines dawn and dusk times
  • Automatic Daylight Saving Time (DST) adjustment
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Product Overview

The ST01 7-Day Programmable In-Wall Timer from Intermatic is a heavy-duty 15 Amp lighting control that can be installed in both residential and light commercial applications. Users can program up 40 ON/OFF events each week to automate routine lighting schedules and improve energy efficiency within the home. The ST01 simplifies everyday use with a convenient Astronomic feature, which allows homeowners to automatically set ON and OFF times throughout the year based on geographic dusk and dawn patterns. Similarly, the in-wall timer includes an automatic Daylight Saving Time (DST) adjustment feature, which keeps schedules in sync as the seasons change without requiring additional maintenance. Perfect for entryways, garages, landscape lights, attic fans and more, the ST01 In-Wall Timer offers an easy-to-use interface that makes programming schedules simple for homeowners of all technology backgrounds. The control can be installed in either a single or 3-way switch configuration, as well as paired with a variety of lights, including incandescent, fluorescent, CFL and LED. No neutral is required, making the ST01 an ideal retrofit solution.
  • Random mode varies on/off schedule to provide a "lived-in" appearance
  • Single or 3-way switch compatible installation
  • Incandescent/fluorescent/CFL/LED compatible
  • Isolated switch allows timer to be used with any load type, including AC and DC loads
  • Replaceable CR2 lithium battery provides up to 3-years of operation
  • No neutral wire connection enables easy retrofitting and quicker installation
  • Perfect for entryway lighting, landscape light controls, attic fans and more
  • Click here for more information on Electronic Recycling Programs
  • California residents

Additional Resources

From the Manufacturer

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Price
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/package
Ratings
(617)
(113)
(7)
(20)
Timer TypeAstronomicalAstronomicalDigitalDigital
Indoor/OutdoorIndoorIndoorIndoorIndoor
Electrical FeaturesProgrammableIlluminated,ProgrammableProgrammableIndicator Light,Programmable
Amperage (amps)15 A15 A15 A15 A
Wattage (watts)1875 W1800 W1800 W800 W
Mounting TypeIn-WallIn-WallWall SwitchIn-Wall
Compatible Bulb TypeCFL,Incandescent,LEDCFL,Halogen,Incandescent,LED,XenonCFL,HalogenCFL,Halogen,Incandescent,LED
Voltage120 volt,277 volt120 volt120 volt120 volt
RatingGeneral PurposeGeneral PurposeGeneral PurposeGeneral Purpose
View ProductView ProductView ProductView Product

Specifications

Dimensions

Product Depth (in.)1.813 inProduct Height (in.)4.125 in
Product Width (in.)1.75 in

Details

Amperage (amps)15 AColor FamilyWhite
Color/FinishWhite/PlasticCompatible Bulb TypeCFL,Incandescent,LED
Electrical FeaturesProgrammableElectrical Product TypeTimer
Indoor/OutdoorIndoorMaximum time setting (min.)1440
Mounting TypeIn-WallRatingGeneral Purpose
Returnable90-DayTimer TypeAstronomical
Voltage120 volt,277 voltWattage (watts)1875 W

Warranty / Certifications

Certifications and ListingsCSA-US CertifiedManufacturer Warranty1-year limited

Questions & Answers

Typical questions asked about products:

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Customer Reviews

  • 4.2
    out of 617 reviews
  • 84%recommend this product
Filter by:
Showing 1-10 of 617 reviews
Easy Install and Works Great
I have purchased a number of Intermatic timers in the past for my own house and for my rental units. They are super easy to install and have worked perfectly over the years. There are several timing options for each day of the week so there is a lot of flexibility with regard to having your lights come on and turn off. If the power goes out, there is a handy battery backup so you won't lose your settings.
by
  • Verified Purchase
  • Recommended
Durable, useful, clean
I have 3 of these in various places in my house. These are solid devices that work great and look good. Beats a regular switch/wiring up a photocell by a mile.
by
    • Recommended
    1 found this review helpful
    Installed 3 In a Day - Programmed in Minutes
    I installed 3 of these on Saturday in two different 3-gang boxes. 2 of them are 3-way, one is single pole. As per the instructions, I programmed all 3 prior to installation. Programming the first took about 5 min and the other two took literally 60 seconds. Now, all three outdoor lights come on simultaneously at Dusk and turn off at Dawn (I programmed Dawn = 7:15AM). So I have it set to AUTO Dusk and Dawn, but I manually set what time I wanted "Dawn" to be. has been working flawlessly for 3 days. Two important things- set the clock first and make sure you set it right- by default it starts with AM. Pay attention to the flashing parts- you can always move backwards if you hit a button wrong. If you have an old shallow 1950's metal box like me, this will be a tight fit, but if you are neat and deliberate with your folds (use a screwdriver to neatly push wires in behind the box) it will fit in. BUT you will need to ditch the nuts they provided and buy the 14gauge orange nuts (and 16 gauge blue nuts for any single wires you cap off). Trust me, the smaller nuts make all the difference. Also, do yourself a favor and buy the Ideal Push-in connectors for any bundles in the gang box- it will make it far easier to neatly fold in the wires insteaded of twisted wires. There is about an inch behind the box, but if you have an incoming Romex wire coming into the box right behind, then it's more like 3/4" space. But it can be done. Frankly, connecting the wires only took me 2 or 3 minutes and programming was another 2 or 3 minutes- what took me 3 hours was all my planning ahead: labeling all my incoming cables, labeling all my pre-existing wires, and re-wiring the box so that everything would fit. If you understand the concept of pigtailing- this is not hard. Plus- I watched the Intermatic Youtube How-to video twice and it was soooo much easier if you watch the video. The diagram drawing is worthless- however, the table showing what each color should be connected to is crucial. Working without a neutral was not necessary- what was necessary for me was a unit that could handle single and 3-way so all the units were uniform. Also, I returned the Tork timers because there were 6 wires on each unit and there is no way they would have all fit into the box after capping off.
    by
      • Recommended
      3 found this review helpful
      Expensive maintenance
      Installed and was happy for the first month or 2 until I had to replace the battery. CR2 batteries are not cheap and this light switch goes through them so fast. Ended up ordering a huge case of batteries, and right when they arrive the display stops working. To replace the batteries you need a small flathead to open, broke a finger nail on it once when I was to lazy to grab my tool box. Just went back to a regular switch and I am so happy to be rid of this.
      by
        3 found this review helpful
        Very easy to install, whenever you cant adapt a photocell into an outside fixture, it's perfect f...
        Very easy to install, whenever you cant adapt a photocell into an outside fixture, it's perfect for that.
        by
        • Verified Purchase
        • Recommended
        Good switch
        I had no issue installing and programming the timer, it worked as advertised. my on complaint is that I wish it was back lit.
        by
          • Recommended
          2 found this review helpful
          This is the second one of these I've purchased over the years. The first one worked great. This...
          This is the second one of these I've purchased over the years. The first one worked great. This one not so much. I had a professional electrician install it for my front porch lights.Unfortunately we've been unable to get it to work properly. We wanted to use the dusk to dawn feature. The lights do turn on at dusk however they do not turn off at dawn. We've reset and programmed multiple times but it just does not work.
          by
          • Verified Purchase
          13 found this review helpful
          I just replaced an Intermatic timer blown by a lightening strike. It's a good timer. However, t...
          I just replaced an Intermatic timer blown by a lightening strike. It's a good timer. However, the display is difficult to read in low light, and sometimes confusing. You need to pay attention to the flashing parts of the display. It takes several tries to get the basic scheduling right. Overall a good replacement for the other Intermatic timer.
          by
          • Verified Purchase
          • Recommended
          2 found this review helpful
          Easy to install and setup. I did have a little problem setting the Dusk On and Fixed Time Off se...
          Easy to install and setup. I did have a little problem setting the Dusk On and Fixed Time Off setting. I had to read the instructions a few times to get the gist. One issue was that I thought dusk is the same a sunset but it is not. I live in the central zone so I set it to north zone and now the timer will turn on close to sunset. I like the fact that it has a relay and not a solid state switch. It can power any type of load
          by
          • Verified Purchase
          • Recommended
          2 found this review helpful
          This timer is easy to install in the wall and has many on/off settings. The problems are the pro...
          This timer is easy to install in the wall and has many on/off settings. The problems are the programming instructions are not easy to understand and the digital numbers/symbols are very small & hard to read. It took a bright light and magnifying glass and 4 separate hour-long sessions to finally get it programmed. It is now programmed for dawn to dusk which isn’t what I wanted but can live with it. The picture shows how small the window is to see the numbers/symbols and there is not enough contrast between numbers and background.
          by
          • Verified Purchase
          Showing 1-10 of 617 reviews