valveLINK Controller

What It Is

The Growlink valveLINK is an 8-channel irrigation valve controller purpose-built for controlled-environment agriculture. It drives up to eight standard 24VAC 2-wire diaphragm valves or 24VAC motorized ball valves — one controller per zone bank, each channel fully independent. Power input is 24VDC via the included adapter, and the unit simulates 24VAC to the valves through a 50% duty-cycle PWM signal at 1 kHz, with a 1-second DC inrush pulse to reliably open diaphragm valve coils on activation.

The valveLINK lives inside the Growlink LINKS ecosystem and connects to Growlink OS via Wi-Fi or wired RJ-45 through the LINKS HUB. That connection means every valve event — whether fired manually, on a schedule, or triggered by sensor data — is logged, time-stamped, and visible in the central dashboard alongside climate, substrate, and nutrient data. It is manufactured in the United States and rated for demanding agricultural environments including high-humidity indoor grows.

Who It's For

The valveLINK is the right tool for licensed cannabis and hemp operators running multi-zone drip, flood, or misting systems who need zone-by-zone irrigation control without managing a separate timer bank for each zone. If your facility runs distinct rooms, benches, or trays with different strains, substrates, or growth stages, the ability to assign each of eight channels its own schedule and logic — independent of the others — directly addresses the consistency problem that manual or single-zone irrigation creates.

It is particularly valuable for operations implementing data-driven crop steering where irrigation timing, frequency, and shot volume need to respond dynamically to real substrate moisture readings rather than a fixed clock. Facilities already running or planning to run Growlink TerraLINK substrate sensors and canopyLINK environmental sensors get the most out of the valveLINK, since Copilot can close the loop between sensor data and actual valve actuation without staff intervention between events.

Key Features & Control Modes

Three operating modes give operators a practical adoption path. Manual mode lets staff fire any valve on demand from the Growlink OS dashboard — useful for flush events, system checks, or spot corrections. Scheduled mode runs time-based irrigation programs per channel, supporting different schedules for seedling, vegetative, and flowering zones on the same controller. Sensor-based mode, the most advanced, connects live substrate VWC and EC data from TerraLINK sensors directly to valve trigger logic through Copilot — meaning irrigation events fire when the substrate actually needs water, not when the timer says so.

Copilot's CoPilot and AutoPilot programs take this further: CoPilot analyzes the previous cycle's substrate data and suggests adjustments to the next cycle's irrigation events to hit your target VWC rise, dryback percentage, and substrate EC ceiling. AutoPilot automatically accepts those suggestions, running fully autonomous crop steering across your valve zones. Centralized management through Growlink OS provides remote monitoring, data logging, and alerts — all eight channels, all zones, one dashboard.

How It Fits a Commercial Build

The valveLINK is a component in Growlink's broader LINKS device ecosystem, not a standalone box. It operates alongside the LINKS HUB (which connects and powers up to eight LINK devices), TerraLINK substrate sensors, canopyLINK canopy environment sensors, and climaLINK climate monitors — all unified under Growlink OS. For operations that have already standardized on Growlink for climate and environmental monitoring, adding valveLINK is the logical step to bring irrigation into the same automated system rather than running a disconnected timer bank.

For new builds, the valveLINK scales cleanly: one unit handles up to eight zones; add additional controllers for larger facilities with more zone banks. Compatible valve types include standard 24VAC 2-wire diaphragm valves and 24VAC motorized ball valves — the industry-standard formats used across drip irrigation, flood-and-drain, and automated misting systems in commercial CEA. Installation guidance from Growlink recommends mounting outside the grow environment where possible, or in a sealed enclosure when high-humidity placement is unavoidable.