Time-R Digital Timer - Second-Accurate Programmable Timer for Grow Room Kit
Best for: Growers who need more control than a basic on/off plug timer, especially for running pumps, misting or CO2 dosing on short repeating cycles.
Our thoughts
A basic mechanical timer is fine for switching a light on and off once a day, but it falls apart the moment you need short repeating cycles for a pump or CO2 regulator. The Time-R handles both jobs from one unit, down to the second, with a green backlit display that won't mess with your light cycle if it's sat in the tent.
The Time-R Digital Timer is a programmable plug-in timer built for grow room equipment that needs more precision than a standard 24-hour segment timer can offer. It can run in three modes: Timed Mode for up to 15 on/off cycles across a 24-hour period (useful for a standard light cycle plus extra scheduled events), Repeat Mode for short, repeating intervals from as little as one second up to 99 hours (ideal for irrigation pumps or CO2 dosing), and Combined Mode, which runs up to three separate groups of settings across the same 24 hours for more complex setups.
It uses a 30A heavy-duty relay, rated for demanding loads like water pumps and larger fans, and includes a built-in battery backup so your programmed schedule survives a power cut rather than resetting to zero. The display is a clear, green-backlit screen designed specifically not to interfere with grow or bloom light cycles if the timer is mounted inside or near a tent.
How it compares
A step up from the basic mechanical pin timers found in most grow shops, at a modest price premium.
- Versus a standard mechanical segment timer, the Time-R offers second-level accuracy and repeating short cycles that a mechanical timer's fixed segments simply can't replicate.
- Versus basic single-cycle digital timers, the three programmable groups and Combined Mode let you run several different schedules from one unit rather than buying multiple timers.
- Versus higher-end environmental controllers from brands like Titan Controls or Autopilot that bundle timing with sensor-based control, the Time-R is a simpler, cheaper option focused purely on precise switching rather than environmental monitoring.
More capable than a basic timer, without paying for sensor-based automation you may not need.
Usage guidance
Light cycles
Use Timed Mode to set your standard lights-on/lights-off schedule, just as you would with a mechanical timer, but with the option to add extra on/off events across the same 24 hours.
Pumps and irrigation
Use Repeat Mode to run short, repeating on/off cycles measured in seconds or minutes - useful for drip irrigation, aeroponic misting or dosing pumps that need frequent brief bursts rather than long on-periods.
CO2 dosing
Repeat Mode also suits CO2 regulator cycling, letting you dose in short controlled bursts through the day rather than running continuously.
Multiple schedules
Use Combined Mode with up to three programmed groups if you need, for example, a light schedule and a separate pump schedule running independently from the same timer.
Technical specifications
- Relay rating: 30A heavy-duty
- Modes: Timed Mode, Repeat Mode, Combined Mode (up to 3 groups)
- Cycles per day: Up to 15 on/off events (Timed Mode)
- Minimum interval: 1 second (Repeat Mode)
- Maximum repeat interval: Up to 99 hours
- Clock setting: 12/24 hour option
- Display: Green backlit, grow-room friendly (won't disrupt light cycles)
- Memory backup: Built-in battery, retains settings through power cuts
Who this is for
- Growers running irrigation pumps, misting systems or CO2 regulators that need short repeating cycles
- Anyone who's outgrown a basic mechanical plug timer's fixed 15/30-minute segments
- Growers who want one timer covering several different scheduled events instead of buying multiple units
- Growers who want peace of mind that a power cut won't wipe their programmed schedule
Best suited to setups with more than just a light to switch - once you're timing pumps or dosing equipment, this earns its keep quickly.
Our take
The Time-R fills a real gap between a basic mechanical timer and a full environmental controller - genuine second-level accuracy and three programmable groups for equipment that needs more than a simple on/off. If all you're timing is a single light, it's more than you need; for anything with pumps or dosing involved, it's the right tool.
Does exactly what it should, day in, day out. Worth picking up if your setup has grown past what a basic timer can handle.
