Climalink Climate Sensor

What the Climalink Measures

The Climalink monitors five environmental parameters simultaneously: air temperature, relative humidity, vapor pressure deficit (VPD), canopy-level light (lux), and — in the CO₂ variant — ambient CO₂ concentration. VPD is calculated automatically on-device from the live temperature and humidity readings, so you get a derived value that actually tracks transpiration pressure rather than relying on manual lookup tables or secondary software.

Temperature range spans -40 °F to 257 °F (-40 °C to 125 °C) with an accuracy of ±0.18 °F (±0.1 °C). Humidity covers 0–100% RH at ±1.0% RH accuracy. The optional CO₂ module reads 0–5,000 ppm at ±3% accuracy and is pressure-compensated, which matters if your facility sits at elevation. The built-in PAR/lux sensor gives you a canopy-level light verification point without a separate meter — useful for confirming uniformity zone to zone.

Aspirated Design: Why It Matters for Accuracy

Passive sensors sitting inside a sealed housing are reading the air pocket trapped around the element, not the actual room air — and in a high-HVAC, high-light commercial grow, the difference between stagnant air and moving air at the canopy can be several degrees Fahrenheit and multiple RH percentage points. The Climalink solves this with an active aspiration system: a small internal fan continuously draws ambient air across the sensing elements so readings reflect actual canopy conditions, not the microclimate inside the housing.

The housing also incorporates specialized filter media for dust and moisture protection, which is critical in environments running CO₂ enrichment, heavy irrigation, or high transpiration loads. Easy-swap filter packs are available to keep readings accurate over the life of the sensor. For facilities where regulatory compliance or internal SOPs require documented environmental data, sensor drift from contamination is a real audit risk — the filter system is a direct answer to that.

Growlink OS Integration and Automation

The Climalink is purpose-built for the Growlink LINKS ecosystem. It connects to the canopyLINK hub or the Growlink HUB directly, delivering live data into Growlink OS for centralized logging, threshold-based alerts, and automation triggers. If your VPD climbs above target, OS can automatically signal your HVAC, dehumidifier, or humidifier — no manual intervention. One climaLINK sensor per climate zone is the standard deployment; the canopyLINK hub supports up to eight LINKS devices total.

For operations already running Growlink controllers — whether precision irrigation PICs or the full LINKS stack — the Climalink plugs into the same SDI-12 architecture. Up to four Climalinks can be connected to a standalone ESP Precision Irrigation Controller simultaneously, making it practical to cover multiple zones or bench rows from a single controller without adding a separate data logger. Data is centralized in Growlink OS regardless of how many sensors are in the network.

Who Should Be Running the Climalink

Licensed cannabis and hemp cultivation operations running Growlink controllers where climate data needs to be automated rather than manually logged. Particularly well-suited to multi-room facilities where zone-to-zone environmental consistency is a compliance and quality requirement — each room gets its own sensor, all data rolls up to a single OS dashboard. Greenhouse operators benefit from the aspirated design, which prevents solar heat loading of the housing from skewing readings on sunny days.

The Climalink is also a strong fit for operations adding CO₂ enrichment programs where you need closed-loop feedback — the optional CO₂ variant closes the loop between your CO₂ generator or regulator and actual room ppm, rather than running enrichment on a timer alone. Made in the USA. Package includes the Climalink sensor and a 5m M8 cable. The canopyLINK hub is sold separately and required for LINKS-architecture deployments.