Intermatic ST01K Astronomic Digital In-Wall Timer – Auto DST & Sunrise/Sunset Control

Overview

The Intermatic ST01K is a self-adjusting in-wall timer designed to simplify lighting control in today’s homes. Install once and let it manage daily on/off schedules, with no neutral wire required—perfect for retrofit and remodel projects where modernizing the wall plate is a consideration.

This timer is compatible with LED, CFL, and incandescent loads, making it a versatile choice for living rooms, porches, hallways, and entryways alike. The large LCD display provides a clear readout of time, mode, and load status, making adjustments quick and intuitive.

Smart Scheduling with Flexible Timing

Choose either a 24-hour or a 7-day timer and program up to 20 ON/OFF events. The scheduling options are designed to adapt to real-life routines, whether you want lights to greet you in the evening or turn off automatically after a school day.

• 24-hour or 7-day digital timer
• Up to 20 ON/OFF events for precise control
• Works with single-pole or 3-way configurations

Astronomic and Dynamic Features

The built-in astronomic feature tracks daily sunrise and sunset, and it automatically adjusts for daylight saving time. This means your lights can align with natural clock changes without manual tweaks, potentially reducing unnecessary lighting after dusk.

• Astronomic timekeeping with automatic DST adjustments
• Random feature subtly varies ON times for a lived-in appearance

Ease of Use and Reliability

With a large LCD, manual override, and battery backup, you can review or adjust settings at a glance and keep the system running during power interruptions. The absence of a neutral wire simplifies installation in many retrofit scenarios, and the timer is CSA certified for safety and reliability.

• Manual override for immediate control
• Battery backup to preserve settings during outages
• CSA certified for safety and quality

What It Handles and Where It Shines

The ST01K covers a range of loads and configurations, including resistive, tungsten, ballast, motor, and DC loads at various voltages. This makes it suitable for both indoor and some light commercial lighting projects where automated schedules can enhance convenience and ambiance.

Key benefits include retrofit-friendly installation, precise scheduling, and a smart blend of automation features that respond to real-world lighting needs without promising guaranteed outcomes.