Intermatic ST01 Timer, 7-Day Heavy Duty Self-Adjusting Digital Wall Switch Timer - White

Brand: Intermatic
Model: ST01
Condition: New
Warranty: 1 Year
SKU: 861688
4.95 (7 Reviews)
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Intermatic ST01 Light Timers

Regular Price: $41.99
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Intermatic's self-adjusting wall switch timer allows you to set it once and walk away! Never bother with resetting again, unless you want to. This timer utilizes an astronomical feature to keep track of daily sunrise/sunset changes. The timer is for use with single pole or 3-way applications, allowing you to control multiple devices with one timer. The large LCD display provides an easy read-out of monitor activity. In addition, the optional random setting can vary the time your devices turn on by a few minutes.

  • Set It Once & Never Set It Again
  • Controls Lighting Including Fluorescent & Heavy Duty Loads such as Fans and Appliances
  • Up to 6 ON/OFF Settings per 7-day Period
  • LCD Digital Clock and Readout
  • To-The-Minute Setting Accuracy
  • Battery Backup
  • Random Setting Feature Available to Avoid Predictable Timer Controlled Look
  • Manual Override Feature
  • Use with Decorator-Style Wall Plate (Sold Separately)
  • Replaces Intermatic Model SS8C
  • Color: White
  • Adjustments: Up to 6 ON/OFF settings per 7-day period a total of 42 ON/42 OFF settings per week
  • Time Setting: Astronomical Time Clock adjusts automatically
  • Feature: Manual Override
  • Resistive: 15 A, 120-277 VAC
  • Tungsten: 15 A, 120 VAC, 6 A, 208-277 VAC
  • Ballast: 8 A, 120 VAC, 4 A, 208-277 VAC
  • Motor: 1 HP, 120 VAC, 2 HP, 240 VAC
  • DC Loads: 4 A, 12 VDS, 2 A, 28 VDS
  • For single pole and three way applications up to 100 ft.
1 year through the manufacturer.
Customer Reviews

Intermatic ST01

The Intermatic ST01 was installed as a light controller in my greenhouse for the led grow lights. It was set to duplicate light sunrise to sunset 365 days a year and has worked as advertised for the six months or more it has been installed.


on 01-20-2016 by Richard

Unique, very functional timer

My application was for outdoor & landscape lighting controlled by separate wall switches that I wanted to control simultaneously to come on at dusk and off at a given time. The Intermatic Timer is a perfect solution. These switches, although a bit tricky to program (hang onto the instructions!), offer many variables, including timing "dusk" based on your time zone and allowing off at dawn, after a certain number of hours, or at a specific time. A great product that is a much better solution than a photocell or any other timer. Can incorporate a dimmer if you have room for a two-gang box.


on 11-02-2015 by Joe

Great product

I love this product, it is versatile and easy to set-up, very much like a Casio watch. There are so many ways to program that you can always look like you are home. Can install in place of any light switch. I bought 3 of them and they all work perfectly.


on 10-21-2015 by John


use this timer at work to control lights for park concession stands and restroom lights. easy to use with the two wire hookup.


on 07-28-2011 by paul

Vast improvement

I've been using mine for 3 years now. It's foolproof. Tricky to program, but worth the effort Iand patience). Adjusts sunrise/sunset for each day of the year automatically, can work with a transformer (and dimmer.) Versatile: you can use sunset ON, a specified time OFF, sunset ON, sunrise OFF as you wish. Adjusts for daylight saving as well.

This gadget relieved me from the chore of re-setting my walk light time several times per year...and the cost of having them go on while it's still light.. Great break-through


on 01-06-2011 by Bob

High Quality Product

I've been using Intermatic products for years and the ST01C does not disappoint. It is adapted for use with the new energy smart bulbs and Iinstalled all new timers when I switched to the new bulbs. Intermatic has also upgraded the features on this model. It is highly programmable with options for seasonal time changes where you don't have to do a thing but choose the DST mode. The ST01C is well built and engineered. I wouldn't hesitate to purchase this product again.


on 05-11-2010 by John


Works great! I can keep people guessing when I'm home and awake. I use this on my garage and sidewalk lights. We have had a problem with young adults running around the neighborhood at night. They certainly don't hang around my house anymore!


on 12-09-2008 by Patrick -Prior Lake, MN

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Questions & Answers

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*Can this timer (Intermatic ST01) be programed to go on at sunset and off at a specified time?

by Suzanne L. on 10-28-2015


on 11-29-2015

The description says up to 6 on/off in seven days. Does this mean once each day with nothing on the seventh day? Or does it mean 6 on/offs PER DAY for seven days?

by James G. on 02-17-2015

The Intermatic ST01 Timer can have 6 on/off functions per day in the 7 day period that it is programmed to.

on 02-17-2015

How many wires come out of this Intermatic timer?

by Larry N. on 12-15-2014

There are 3 wires that come out of this unit.

on 01-02-2015

Does the Intermatic ST01 automatically adjust for each sunrise?

by Christi G. on 10-27-2014

Yes, you will adjust it to the time you desire once and it will automatically come on everyday at that time.

on 10-28-2014

Does the Intermatic ST01 have dimmer capability?

by Christine B. on 06-18-2014

No, the Intermatic ST01 does not have a dimming capability.

on 06-19-2014

What are the dimensions of Intermatic ST01 timer?

by Robert H. on 06-06-2014

The dimensions for the Intermatic ST01 are: 2.3 x 3 x 4.9 inches

on 06-09-2014

Will this Intermatic timer work with LED lamps?

by Garry J. on 02-04-2014

The Intermatic ST01 timer is compatible with incandescent, fluorescent, CFL, and LED lights, as well as single-pole or 3-way compatible. This unit also auto adjusts to any voltage and frequencies for easy installation.

on 03-17-2014

I need operation instructions for the wall switch timer (intermatic EJ500C). Could you email me one? Thank you David

by David F. on 10-11-2013

Hi David. Here is a link to a PDF file for those instructions. KMR

on 10-17-2013

What does the spec ' For single pole and three way applications up to 100 ft.' mean? I have lights about 400 feet away from where this controller will be located. Will this work?

by Frank P. on 09-07-2012

The Intermatic digital wall timer has a distance limit of 100ft. Distances over 100ft may not work as well as it is designed to. This applies primarily to 3-way applications.

on 09-07-2012

Can the Intermatic EJ500C switch or the ST01 be used with compact flourescent light bulbs

by William N. on 08-22-2012

The Intermatic EJ500C will control only Incandescent Lighting, where as the ST01 will be able to control your Flourescent lighting. 

on 08-22-2012
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