Feed CO₂ Only When Your Plants Can Actually Use ItThe TrolMaster Beta-8 Digital CO₂ PPM Controller gives indoor growers a simple, accurate way to manage supplemental CO₂. A high-quality NDIR (Non-Dispersive Infrared) sensor reads CO₂ at canopy height in real time and automatically switches a regulator or generator on or off to hold your target range. A built-in photocell restricts dosing to lights-on periods, so no CO₂ is wasted during the dark cycle when plants are not photosynthesising.Key Benefits Automatic CO₂ control of regulators or generators based on live PPM readings Photocell-gated dosing so CO₂ only runs during lights-on periods High-accuracy NDIR sensor (±50 PPM) for reliable monitoring Adjustable 400-2000 PPM range to suit any crop and stage Fuzzy-logic control for tighter precision with compressed CO₂ systems LED display for easy setup, with a 16ft (4.9m) sensor cable for flexible placement CO₂ dropping off as soon as plants start pulling it in?Once photosynthesis is running at full pace, CO₂ in a sealed tent or room can fall well below optimal fast, and low CO₂ caps vegetative growth, slows nutrient uptake and limits yield in flower. The Beta-8 keeps a live PPM reading at canopy height and brings your CO₂ device online the moment levels drop below the set point, then stops once the target is reached, so plants never run on a depleted atmosphere.How to Use Mount the CO₂ sensor near the plant canopy using the included cable Connect the sensor to the Beta-8 controller Plug your CO₂ regulator or generator into the controller outlet (maximum 10A) Set the target CO₂ PPM range on the LED display Adjust the deadband to control how tightly the range is held The controller then doses CO₂ automatically to maintain the target level Technical Specifications Input voltage: 120V AC Output relay rating: 10A Fuse rating: 6A / 250V CO₂ control range: 400-2000 PPM Deadband range: 20-200 PPM CO₂ accuracy: ±50 PPM Sensor type: NDIR (Non-Dispersive Infrared) Sensor cable: 16ft (4.9m) Power cord length: 1.8m Dimensions: 275mm (L) x 87mm (W) x 94mm (H)