TrolMaster Legacy BETA-4 Digital Day/Night Temperature Controller

TrolMaster Legacy BETA-4 Digital Day/Night Temperature Controller

TrolMaster Brand Product

Availability: In stock

Lead time: In stock items ship within 24 hours


BETA-4 is a simple and practical temperature controller. It utilizes a highly visible and intuitive LED screen to let you know current temperature level or the max/min temperature recorded values.


  • Built-in Photocell detecting day and night status
  • LED screen display simple to operate
  • Temperature control range is 40°F to 100°F
  • Temperature sensor with 16' cable for close placement to the plant canopy
  • 3 year warranty


Input Voltage:120 Volts AC
Output Switch:Triac
Fuse Rating:6A/250V~
AC Power Cord Length1.8m
Temperature Control Range:40-100°F
Temperature Deadband:5°F
Packaging Dimensions:275mm(L) x 87mm(W) x 94mm(H)
Gross Weight:0.56kgs
Tech Specs


Weight (lb.)1.2
Length (in.)10
Width (in.)3
Height (in.)3.7
Prop 65No
Controller FunctionsTemperature Control
Number of ZonesSingle Zone
Temp Setting Range40-100°F
Has PhotocellYes
Display Readout TypeLED Display
UL ListedNo

Customer Reviews 1 item(s)

Could be better
So the price wasn't too bad, but I do have some issues. First, it should really have an outlet for both heating and cooling, I want to grow year round and some months are going to need me to switch back and fourth all the time. Second, the unit has to be under the light in order to utilize the night/day modes (which was the main point for buying this particular controller), but in my grow area, I can't read the display or status lights because it is too bright. I solved this by mounting it in a dark area and then positioning a fiber optic cable to shine light from the grow area into the light sensor. It would be nice if the light sensor was on the probe. Otherwise, it does its job pretty well. If those things I mentioned don't bother you, you'll love this thing.

Download Our App

Faster checkout, tracking notifications & more!