NDIR precision, fuzzy-logic control, and day/night photocell — for regulators and generators.
The TrolMaster Beta-8 is a dedicated digital CO2 PPM controller compatible with both CO2 regulators and CO2 generators, built around a precision NDIR (Non-Dispersive Infrared) sensor with a 16 ft remote cable for accurate canopy-level readings. Fuzzy-logic output control, adjustable deadband, and a built-in photocell make it a reliable single-point solution for closed-loop CO2 management in licensed cultivation facilities.
The TrolMaster Beta-8 is a standalone digital CO2 controller designed to maintain a dialed-in PPM setpoint inside a sealed or semi-sealed grow room. The unit accepts a CO2 regulator or CO2 generator plugged directly into its output receptacle. The included remote NDIR sensor continuously samples the air at canopy level and feeds that reading back to the controller. When CO2 falls below setpoint, the Beta-8 opens the output relay to activate the injection device. When the reading climbs above setpoint plus the configured deadband value, the relay closes and injection stops.
The core sensing technology — Non-Dispersive Infrared (NDIR) — is the industry-standard method for accurate, long-term CO2 measurement. Unlike cheaper electrochemical or metal-oxide sensors, NDIR sensors are not consumed by CO2 exposure over time and maintain calibration accuracy across years of continuous use. The Beta-8 sensor is field-recalibratable, which matters for facilities running multi-year compliance programs where sensor drift cannot be left unaddressed.
The Beta-8 is the right fit for licensed cannabis and hemp operators running a single room or zone with an existing CO2 delivery device — either a bottled gas regulator or a propane/natural gas CO2 generator — who need closed-loop PPM automation without integrating a full environmental controller platform. It is a single-function unit: CO2 in, relay out, sensor feedback. Setup is plug-and-play, and the front-panel LED display keeps current PPM readable at a glance during any room walk.
Facilities that already run a full-featured environmental controller system (such as TrolMaster's Hydro-X platform) for temperature, humidity, and light scheduling may prefer to use the Beta-8 as a dedicated CO2 loop rather than adding a sensor module to a shared controller — keeping CO2 logic isolated and independently auditable. It also works cleanly for operators who run mixed equipment where their main controller does not have a CO2 relay output.
Fuzzy-logic output control is the Beta-8's most operationally significant feature for facilities running compressed CO2 (tank + regulator setups). Standard on/off relay control opens the solenoid fully until setpoint is reached, which can produce PPM spikes and overshoot — wasting CO2 and stressing plants near the injection point. With fuzzy-logic enabled, the Beta-8 calculates a proportional PWM signal as the measured PPM approaches setpoint, modulating the output rather than switching hard on/off. The result is tighter PPM bands and lower CO2 waste over a crop cycle.
The built-in photocell on the remote sensor handles day/night mode automatically: CO2 injection is suppressed during dark periods without any timer programming. Operators can still configure a manual deadband range (20–200 PPM adjustable) to tune how tightly the controller holds the setpoint for their room volume and injection device response time. Min/max PPM recall lets staff quickly check the highest and lowest readings logged since the last reset — useful for shift handoffs and compliance documentation.
The 16 ft remote sensor cable gives operators meaningful flexibility in positioning the sensing point independent of where the controller box is mounted. Best practice in commercial cultivation is to position the sensor at mid-canopy height, away from direct injection points and air handler return paths, to get a representative room average rather than a localized spike. The controller body mounts on a wall or equipment rack and plugs into a standard 120V NEMA 5-15 outlet; the CO2 device plugs into the Beta-8's switched outlet.
Important load note: the device plugged into the Beta-8 should not exceed the rated amperage. Most standard CO2 regulators (solenoid valves) draw well under this threshold; CO2 generators vary — verify your generator's running amperage before connecting. For multi-zone facilities, a separate Beta-8 per zone is the clean approach, keeping each zone's CO2 loop independently controlled and logged. The Beta-8 does not require network connectivity or a subscription service — it operates entirely as a standalone unit.
| SKU | Beta-8 |
| Input Voltage | 120V AC |
| Output Relay Rating | 10A |
| Fuse Rating | 6A / 250V~ |
| CO2 Control Range | 400–2000 PPM |
| CO2 Deadband Range | 20–200 PPM (adjustable) |
| CO2 Accuracy | ±50 PPM |
| Sensor Technology | NDIR (Non-Dispersive Infrared) |
| Remote Sensor Cable Length | 16 ft (approx. 4.9 m) |
| AC Power Cord Length | 1.8 m |
| Unit Dimensions (L×W×H) | 275 × 87 × 94 mm |
| Gross Weight | 0.56 kg |
Yes. The Beta-8 is designed for both. CO2 regulators (tank + solenoid) and CO2 generators (propane or natural gas burners) both plug into the Beta-8's switched 120V output receptacle. The controller opens and closes that outlet based on the PPM reading from the remote sensor. Verify that your CO2 device's running amperage does not exceed the unit's output relay rating before connecting.
NDIR stands for Non-Dispersive Infrared — it measures CO2 by passing infrared light through an air sample and detecting absorption at CO2's specific wavelength. Unlike electrochemical sensors that degrade with CO2 exposure, NDIR sensors maintain accuracy over years of continuous use and are recalibratable in the field. For licensed commercial operations where environmental data may be audited, sensor reliability and longevity matter significantly.
With fuzzy-logic enabled, the Beta-8 modulates its output signal proportionally as the room's CO2 PPM approaches the setpoint, rather than switching the relay fully on or off. This reduces PPM overshoot — a common waste point in bottled CO2 systems — and produces a tighter, more stable band around the target. For compressed CO2 systems in particular, fuzzy-logic operation can meaningfully reduce CO2 consumption over the course of a crop cycle.
No. The Beta-8's remote sensor has a built-in photocell that automatically detects ambient light levels and suppresses CO2 injection during dark periods. No additional timer wiring or programming is required. If your facility runs light-deprivation blackout curtains or rooms with very low ambient light bleed, verify that the photocell is positioned where it can reliably detect the room's day/night cycle.
The Beta-8 controls one output (one zone) per unit. For multi-zone facilities, the recommended approach is one Beta-8 per independent CO2 zone, with each unit's sensor positioned at canopy level in its respective room. This keeps each zone's CO2 loop isolated, individually configurable, and independently monitorable — which also simplifies any compliance documentation by room.
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