--- title: Digital Day/Night Fan Speed Controller (BETA-2) description: "Here you will find the Manual for the BETA-2 and\nHere you will find the Tech Sheet for the BETA-2" --- [Skip to content](https://kb.trolmaster.com/hc/en-us/articles/20444244853661-digital-day-night-fan-speed-controller-beta-2#main-content) [![TM\_logo\_transparentBG (250 x 100 px)](https://kb.trolmaster.com/hubfs/TM_logo_transparentBG%20(250%20x%20100%20px).svg)](https://www.trolmaster.com) - Start - Produkte - Preise - Blog - Unternehmen Open main navigation Close main navigation - Start - Produkte - Preise - Blog - Unternehmen - [Contact us](https://rircy.share.hsforms.com/22CCHPVdFQBCsAtrt14vkjw) [Contact us](https://rircy.share.hsforms.com/22CCHPVdFQBCsAtrt14vkjw) TrolMaster Help Center - There are no suggestions because the search field is empty. 1. [Trolmaster Help Center](https://kb.trolmaster.com/?hsLang=en) 2. [TrolMaster Controllers](https://kb.trolmaster.com/trolmaster-controllers?hsLang=en) 3. [Single Task Controllers](https://kb.trolmaster.com/trolmaster-controllers?hsLang=en#single-task-controllers) # Digital Day/Night Fan Speed Controller (BETA-2) **BETA-2 Cut Sheet** **Features** \- Built-in Photocell detecting day&night status \- LED display , easy operation \- Increases or decreases fan speed based on setpoint \- Sensor with 16ft long cable for close placement to plant canopy **Overview** The BETA-2 can control variable-speed fans by using the current temperature to increase or decrease the fan speed. By increasing the fan speed, cooling is increased… decreasing fan speed will reduce cooling capacity. Using the BETA-2 in this way provides a VERY economical and ecient way of dealing with heat within an enclosed space.   ### **Product Specications** Package Content 1 x Fan Controller 1 x Temperature Sensor Intput Voltage 120 Volts AC Fuse Rating 6A/250V Working Environment Temperature 32-122°F, Humidity\<90% Packaging Dimensions 275mm(L) x 85mm(W ) x 95mm(H) G.W. per pack 0.56kgs   **User Manual** **OVERVIEW** Thank you for purchasing the TrolMaster BETA-2 Fan Speed Controller. The BETA-2 is a simple and affordable way to control your fan. Choose your desired fan speed and temperature setpoint, when the temperature is lower than the setpoint, the controller will automatically maintain that specified fan speed. When the temperature is higher than the setpoint, the controller will output 100% power to the fan. When the temperature is lower than the cut-off setpoint, the controller will shut down the fan. A built-in photocell located on the controller automatically detects the day and night status, controlling the fan in day/night mode separately. A remote temperature sensor with 16ft long cable allows close placement to the plant canopy. **FEATURES** ● Built-in Photocell detecting day & night status. ● LED display, easy operation. ● Increases or decreases fan speed based on setpoint. ● Temperature control range is 41°F to 95°F. ● Sensor with 16ft long cable for close placement to plant canopy. ● 3 year warranty **INSTALLATION** ● Mount the Controller on wall, place the sensor in a well ventilated area. ● Connect the temperature sensor to the Controller. ● Plug the Controller into a AC wall outlet. ● Program the desired setting before connecting to your fan. ● Connect a fan to the Controller. Ensure that the fan has proper voltage (120V) and not exceeding its max amperage rating (6A).   **OPERATION INSTRUCTIONS 1\. Reading Temperature** a. When power turned on, the LED will display the current temperature. b. To change between the Fahrenheit and Celsius, press UP button and DOWN button at the same time  for 3 seconds, the °F or °C LED indicator will be flashing alternately.         **2. Set Cut-off Temperature** Press HOME button one time, the LED will be blinking, the LED displays the current cut-off temp setpoint. Press UP button  or DOWN button  to increase or decrease the setting.       **3. Set Day Temperature** Press HOME button two times, the LED will be blinking and the LED displays the current day temperature setpoint. Press UP button or DOWN button to increase or decrease the setting.       **4. Day Fan Speed** Press HOME button 3 times, the LED will be blinking and the LED displays the current day fan speed percentage. Press UP button or DOWN button to increase ordecrease the setting.       **5. Set Night Temperature** Press HOME button 4 times, the LED will be blinking and the LED displays the current night temperature setpoint. Press UP button or DOWN button to increase or decrease the setting.       **6. Set Night Fan Speed** Press HOME button 4 times, the LED will be blinking and the LED displays the current night fan speed percentage. Press UP button or DOWN button to increase or decrease the setting.         **7. Restore the Factory Settings** Press and hold HOME button before plugging the Controller into wall outlet. Power the controller, the LED displays “rESt" and blinks. Keep holding the HOME button for 5 seconds until the LED displays "donE”.     ### **FACTORY DEFAULT SETTINGS**   ### **SPECIFICATIONS**   Here you will find the Manual for the BETA-2, **[Link](https://kb.trolmaster.com/hubfs/TM_TG_ALL_MANUALS/User+Manual+-+Fan+Speed+Controller+(BETA-2).pdf?hsLang=en)** Here you will find the Tech Sheet for the BETA-2, **[Link](https://kb.trolmaster.com/hubfs/TM_TG_ALL_TECHSHEET/BETA-2+Tech+Sheet.pdf?hsLang=en)** - [FAQ + Troubleshooting](https://kb.trolmaster.com/faq-troubleshooting?hsLang=en#main-content) - [Calibration](https://kb.trolmaster.com/faq-troubleshooting?hsLang=en#calibration) - [Setpoints](https://kb.trolmaster.com/faq-troubleshooting?hsLang=en#setpoints) - [Firmware](https://kb.trolmaster.com/faq-troubleshooting?hsLang=en#firmware) - [FAQ](https://kb.trolmaster.com/faq-troubleshooting?hsLang=en#faq) - [Troubleshooting](https://kb.trolmaster.com/faq-troubleshooting?hsLang=en#troubleshooting) - [General Information](https://kb.trolmaster.com/general-information?hsLang=en#main-content) - 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[Smart Lifter Remote (LRC-1)](https://kb.trolmaster.com/thinkgrow-accessoires?hsLang=en#smart-lifter-remote-lrc-1) - [Vertical LED Stands for Inner-Canopy Lamps](https://kb.trolmaster.com/thinkgrow-accessoires?hsLang=en#vertical-led-stands-for-inner-canopy-lamps) - [Lifter Rigging Cable Kit (RC-1)](https://kb.trolmaster.com/thinkgrow-accessoires?hsLang=en#lifter-rigging-cable-kit-rc-1) - [Unitstrut Hanger for Model-H/H Plus/W/V (UH-1) and Model-I/I Plus (UH-2)](https://kb.trolmaster.com/thinkgrow-accessoires?hsLang=en#unitstrut-hanger-for-model-h-h-plus-w-v-uh-1-and-model-i-i-plus-uh-2) - [Alarm Station](https://kb.trolmaster.com/alarm-station?hsLang=en#main-content) - [CO2 Alarm Station (AS-1)](https://kb.trolmaster.com/alarm-station?hsLang=en#co2-alarm-station-as-1) - [CO2 Alarm Station, mixed color (AS-2)](https://kb.trolmaster.com/alarm-station?hsLang=en#co2-alarm-station-mixed-color-as-2) - [CO2 Alarm Station, orange (AS-3)](https://kb.trolmaster.com/alarm-station?hsLang=en#co2-alarm-station-orange-as-3) - [CO2 Alarm Station, blue (AS-4)](https://kb.trolmaster.com/alarm-station?hsLang=en#co2-alarm-station-blue-as-4) - [CO2 Alarm Siren (AS-5)](https://kb.trolmaster.com/alarm-station?hsLang=en#co2-alarm-siren-as-5) - [Cables and Connections](https://kb.trolmaster.com/cables-and-connections?hsLang=en#main-content) - [RJ12 Extension Cable Set (ECS-1)](https://kb.trolmaster.com/cables-and-connections?hsLang=en#rj12-extension-cable-set-ecs-1) - [RJ12 to 3 Pins IP67 Plug Cable Set (ECS-3)](https://kb.trolmaster.com/cables-and-connections?hsLang=en#rj12-to-3-pins-ip67-plug-cable-set-ecs-3) - [4,9m Extension Cable for AMP-2 Sensor Board (ECS-4)](https://kb.trolmaster.com/cables-and-connections?hsLang=en#49m-extension-cable-for-amp-2-sensor-board-ecs-4) - [RJ12 to PushLock Waterproof Connector Cable Set (ECS-5)](https://kb.trolmaster.com/cables-and-connections?hsLang=en#rj12-to-pushlock-waterproof-connector-cable-set-ecs-5) - [4,9m 4-Pin Extension Cable (ECS-6)](https://kb.trolmaster.com/cables-and-connections?hsLang=en#49m-4-pin-extension-cable-ecs-6) - [4-Pin 3,7m Daisy chain control cable (ECS-7)](https://kb.trolmaster.com/cables-and-connections?hsLang=en#4-pin-37m-daisy-chain-control-cable-ecs-7) - [9,8m Extension Cable for IR Emitter (ECS-8)](https://kb.trolmaster.com/cables-and-connections?hsLang=en#98m-extension-cable-for-ir-emitter-ecs-8) - [3,7m RJ12 to 4-Pin IP65 Connector Cable (ECS-9)](https://kb.trolmaster.com/cables-and-connections?hsLang=en#37m-rj12-to-4-pin-ip65-connector-cable-ecs-9) - [7,6m RJ12 Coiled Communication Cable (ECS-10)](https://kb.trolmaster.com/cables-and-connections?hsLang=en#76m-rj12-coiled-communication-cable-ecs-10) - [4-Pin Waterproof Splitter Cable (ECS-12)](https://kb.trolmaster.com/cables-and-connections?hsLang=en#4-pin-waterproof-splitter-cable-ecs-12) - [Touch Spot Extension Cable (TSS-2)](https://kb.trolmaster.com/cables-and-connections?hsLang=en#touch-spot-extension-cable-tss-2) - [150m RJ12 Cable Roll (ECS-500)](https://kb.trolmaster.com/cables-and-connections?hsLang=en#150m-rj12-cable-roll-ecs-500) - [Multifunction Crimper (MC-1)](https://kb.trolmaster.com/cables-and-connections?hsLang=en#multifunction-crimper-mc-1) - [Accessories](https://kb.trolmaster.com/accessories?hsLang=en#main-content) - [RJ12 Splitter Hub (SPH-1)](https://kb.trolmaster.com/accessories?hsLang=en#rj12-splitter-hub-sph-1) - [Grow Camera (TC-2, TC-1)](https://kb.trolmaster.com/accessories?hsLang=en#grow-camera-tc-2-tc-1) - [Touch Spot Extpansion Set (TSS-1)](https://kb.trolmaster.com/accessories?hsLang=en#touch-spot-extpansion-set-tss-1) - [RJ12 Waterproof Straight-Through Inline Coupler (2 Pieces) (ECW-1)](https://kb.trolmaster.com/accessories?hsLang=en#rj12-waterproof-straight-through-inline-coupler-2-pieces-ecw-1) - [Sensor Bracket (2 Pieces) (TSB-1)](https://kb.trolmaster.com/accessories?hsLang=en#sensor-bracket-2-pieces-tsb-1) - [Weatherproof Box (BM-1)](https://kb.trolmaster.com/accessories?hsLang=en#weatherproof-box-bm-1) - [Cabinet (SCC-4)](https://kb.trolmaster.com/accessories?hsLang=en#cabinet-scc-4) - 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