Digital Day/Night Temperature Controller

One Outlet, Two Automatic Temperature Targets

A grow space usually wants a different temperature at night than during the light period, but most plug-in heaters and coolers only offer a single fixed setting that someone has to change by hand twice a day. The TrolMaster BETA-4 removes that chore by giving any plugged-in heating or cooling device rated up to 10 amps its own day and night temperature targets, set once through three buttons and a digital display.

A built-in photocell reads ambient light and automatically switches the active setpoint as conditions change from day to night and back, and the included 16 ft sensor cable lets the temperature probe sit right at canopy height.

Key Features & Benefits

• Heating or Cooling Function — works with either type of plug-in device, matched to whichever one is connected.
• Built-In Photocell — handles day/night detection automatically instead of relying on a manual timer.
• Simple 3-Button Operation — keeps setpoint adjustment straightforward on the digital display.
• 16 Ft Temperature Sensor — reaches canopy height for a reading that reflects actual plant-zone conditions.

Who Should Use the BETA-4 Temperature Controller

Growers running a single plug-in heater or cooler who want distinct day and night temperature targets, without manually resetting the device twice a day, get the most out of the BETA-4. It also suits anyone who wants a simple standalone option instead of a full Hydro-X buildout.

About TrolMaster

As one of TrolMaster's single-task controllers, the BETA-4 is built by the same Sacramento, California team behind the company's larger Hydro-X and Aqua-X systems. It targets growers who need day/night temperature automation for one device rather than a full multi-zone setup.

Frequently Asked Questions

What temperature range can the BETA-4 control to?

It spans 40°F to 100°F. A 5°F deadband is built in to prevent the connected device from cycling too rapidly near the setpoint.

Can the BETA-4 run a heater and a cooler at the same time?

No, it controls one connected device at a time, configured as either a heater or a cooler. Running both would require a second BETA-4 or a different TrolMaster controller.

How does the day and night switch happen?

A built-in photocell reads ambient light levels and automatically applies your saved day setpoint or night setpoint as conditions change. There is nothing to switch manually.

Where should I place the temperature sensor?

Position it near the plant canopy using the included 16 ft sensor cable rather than leaving it at the controller itself. That placement gives a reading that matches what the plants are actually experiencing.