BETA-4 Digital Day / Night Temperature Controller

TrolMaster’s BETA-4 is a single-outlet digital day/night temperature controller for 120 V devices up to 10 A. It provides separate day and night setpoints and uses an onboard photocell to detect the light cycle. An external air-temperature probe is included (about 16 ft cable) for accurate canopy placement. The controller can operate either heating or cooling equipment and is commonly used with portable air conditioners or exhaust fans. A 5 °F deadband helps reduce rapid cycling. The unit features a clear LED display and a simple three-button interface. Designed as a standalone single-task controller, it does not require the Hydro-X system. Package includes the controller and temperature sensor; the power cord measures 1.8 m.