Intermatic ST01K Astronomic Digital In-Wall Timer | Auto DST, No Neutral Wiring, 24/7 Scheduling

Meet the Intermatic ST01K Astronomic Digital In-Wall Timer

The ST01K is a self-adjusting wall switch timer designed for easy retrofits and remodels. It works without a neutral wire, making it a versatile option for existing wiring while providing reliable control over LED, CFL, and incandescent lighting. This timer manages single-pole and 3-way configurations, enabling you to regulate multiple fixtures from a single device. A large LCD display keeps time, mode, and load status clearly in view, helping you stay informed at a glance.

Smart scheduling you can trust

Set a schedule with either a 24-hour or 7-day digital timer and up to 20 ON/OFF events. The built‑in astronomic feature tracks sunrise and sunset, aligning lighting to daily changes and seasonal shifts. A randomization option subtly varies on/off timing to create a natural, lived-in appearance for exterior lighting.

• Automatic daylight saving time adjustment reduces the need for manual resets.
• Randomized timing adds realism to exterior lighting patterns.
• Battery backup and manual override keep you in control during power fluctuations.

Designed for both simple and multi‑location setups

Ideal for single-pole installations, the ST01K also supports 3-way applications, letting you control several lights with one timer. The large LCD readout makes it easy to confirm time, mode, and load status, even from a distance. For a polished look, pair with decorator-style wall plates (sold separately) that blend with your space.

• No neutral wire required, simplifying retrofits and remodels.
• CSA certified for safety and reliability in residential use.
• Compatible with a range of lighting loads including LEDs, CFLs, and incandescent bulbs.

Practical features at a glance

Beyond basic timing, the ST01K offers a robust set of capabilities designed for easy day‑to‑day use. Its 15A resistive rating at 120/277 VAC, along with varied tungsten and motor compatibility, makes it a flexible choice for many rooms and lighting schemes. The timer’s automatic adjustments reduce routine maintenance while preserving the rhythm of your daily life, and the durable construction supports long-term, worry-free operation in a residential setting.

With the ST01K, you gain a dependable tool for coordinating lighting around routines, seasons, and ambiance goals. It presents an opportunity to streamline control without sacrificing flexibility or the look of your space, all while leveraging a design that respects existing wiring and decor.