Digital Day/Night Fans Speed controller

Proportional Fan Speed Instead of Simple On/Off

Running an exhaust fan at full speed around the clock wastes energy and can dry out a grow space faster than necessary, but a basic on/off thermostat only gives two states to work with. The TrolMaster BETA-2 solves that by adjusting a variable-speed fan's output anywhere from 25 to 100 percent depending on the current temperature reading, so cooling effort scales with actual need instead of jumping straight to maximum.

The included 16 ft sensor cable lets you position the temperature probe near the plant canopy rather than at the controller itself, which keeps the fan responding to conditions where it actually matters.

Key Features & Benefits

• 25-100% Speed Range — scales fan output smoothly across that range instead of switching only fully on or fully off.
• Built-In Photocell — detects day and night automatically so the controller can apply different behavior for each.
• 16 Ft Temperature Sensor — reaches the canopy for readings that reflect actual plant-level conditions rather than room-average temperature.
• Simple LED Display — shows current settings clearly without a multi-level menu to navigate.

Who Should Use the BETA-2 Fan Speed Controller

This suits growers with a variable-speed exhaust or circulation fan who want cooling effort to track actual temperature instead of toggling a single-speed fan on and off. It also fits anyone trying to reduce noise and energy use during periods that do not need full airflow.

About TrolMaster

TrolMaster sells the BETA-2 as one of several single-task controllers made alongside its larger Hydro-X and Aqua-X systems. It gives growers who only need proportional fan control a Sacramento, California-engineered option without buying a full multi-zone controller.

Frequently Asked Questions

What fan speed range does the BETA-2 support?

It adjusts a variable-speed fan's output anywhere from 25% up to 100%. The exact speed at any moment depends on how far the current temperature sits from your setpoint.

How does the controller decide when to speed up the fan?

As temperature rises above your setpoint, fan speed increases proportionally, and it decreases again as temperature falls back toward that setpoint. This proportional response is what separates it from a basic on/off thermostat.

Does the BETA-2 behave differently at night?

Yes, a built-in photocell automatically detects day and night conditions and lets you apply separate behavior for each period. No manual switching is required.

Where should the temperature sensor be positioned?

Place it near the plant canopy using the included 16 ft sensor cable, rather than leaving it at the controller. Canopy-level placement gives a more accurate read of the conditions the fan actually needs to respond to.