The Growlink TerraLink+ (GL-LINK-TerraLINK) is a commercial-grade root-zone substrate sensor that simultaneously measures volumetric water content (VWC), electrical conductivity (EC), and substrate temperature using TDR technology. It connects to the Growlink LINKS ecosystem through an M8 connector and feeds live substrate data into Growlink OS and Crop Steering Copilot, enabling data-driven irrigation and crop steering based on actual root-zone conditions rather than fixed schedules.
• SKU: GL-LINK-TerraLINK
• Sensing Technology: TDR (Time Domain Reflectometry) / Capacitance
• Parameters Measured: VWC, EC, substrate temperature
• VWC Range: 0–100%
• VWC Accuracy: ±2% across 1.00–40.00 dielectric permittivity
• EC Range: 0–23 dS/m
• EC Accuracy: ±5% from 0–7 dS/m; ±15% from 7–23 dS/m
• EC Temperature Compensation: 0–50°C
• Temperature Range: -40°C to 80°C
• Temperature Resolution: 0.1°C
• Temperature Accuracy: ±0.5°C
• Output Interface: SDI-12 V1.3
• Connector: M8
• Power Supply: 3.6–16V DC
• Quiescent Current: 30µA
• Measurement Current: 10mA for 150ms per reading cycle
• Ingress Protection: IP68
• Probe Material: Stainless-steel rods
• Sensor Body: Epoxy-resin sealed
• Compatible Substrates: Rockwool, coco, peat, and soil
• Placement: Surface placement or direct burial in the substrate
• High-EC Performance: Designed to maintain measurement integrity during high-EC fertigation and aggressive dryback cycles
• Growlink Integration: Growlink LINKS ecosystem and Growlink OS
• Required Hardware: Growlink canopyLINK hub, sold separately
• canopyLINK Capacity: Up to 8 LINKS devices per hub
• Crop Steering: Live VWC, EC, and temperature data can be used by Crop Steering Copilot for irrigation triggers
• Connectivity: LINKS devices can operate over Wi-Fi independently or connect through the HUB via wired RJ-45
• Important Media Note: High-perlite or clay-pebble mixes can reduce probe-to-media contact and affect reading consistency
Key Advantage: The TerraLink+ combines VWC, EC, and root-zone temperature in one IP68-rated TDR sensor, providing the live substrate data needed for precise crop steering. Its wide EC range and TDR technology are particularly suited to high-EC fertigation and aggressive dryback strategies.