{"product_id":"growlink-terralink-w-m8-adapter-for-canopylink","title":"Growlink Terralink (w\/ M8 Adapter for CanopyLINK)","description":"\u003ch2\u003eReading the Root Zone with the Growlink TerraLINK Substrate Sensor\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003eThe \u003cstrong\u003eGrowlink TerraLINK Substrate Sensor\u003c\/strong\u003e reads volumetric water content, bulk EC, and root-zone temperature directly inside coco or rockwool. The probe runs as a TDR substrate probe — \u003cstrong\u003eTime Domain Reflectometry\u003c\/strong\u003e — so EC drift doesn't corrupt the VWC number during aggressive drybacks. \u003cstrong\u003eVWC\u003c\/strong\u003e reads 0.0–1.0 m³\/m³ at \u003cstrong\u003e±0.02 from 0–53%\u003c\/strong\u003e and ±0.04 above. \u003cstrong\u003eBulk EC\u003c\/strong\u003e spans \u003cstrong\u003e0–20,000 µS\/cm\u003c\/strong\u003e at ±(5% + 10 µS\/cm) up to 10,000 µS\/cm. \u003cstrong\u003eTemperature\u003c\/strong\u003e lands inside \u003cstrong\u003e±0.3 °C\u003c\/strong\u003e across the active grow range. Output is \u003cstrong\u003eSDI-12 V1.3\u003c\/strong\u003e over a 2 m M8 cable, with stainless steel rod sealed in \u003cstrong\u003eIP68 epoxy\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003ePlacing and Wiring the TerraLINK Substrate Probe for Crop Steering\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003ePlacement is what makes or breaks the read. In rockwool blocks and slabs, slide the rod in 1 inch from the bottom, equidistant between two plants. In 1-gallon coco pots aim for 2 inches up from the bottom. In 2-gallon and larger, 3 inches. The probe wires into a canopyLINK port via M8 — Pin 1 12V red, Pin 2 signal white, Pin 3 ground bare. It can also run to the Precision Irrigation Controller on the 30 ft (9 m) cable variant. Growers running Crop Steering Copilot pair this TerraLINK substrate probe with the controller's irrigation logic for shot-by-shot dryback targeting. Avoid mediums mixed with perlite or expanded clay — the air pockets confuse the waveform. Recalibrate the medium profile in Growlink OS when switching between rockwool, coco, and peat blends.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul style=\"text-align: justify;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrue TDR Substrate Read:\u003c\/strong\u003e Time Domain Reflectometry keeps the VWC number honest even at high bulk EC and aggressive dryback.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVWC ±0.02 Accuracy (0–53%):\u003c\/strong\u003e Tight enough to dial in crop-steering shot volumes through veg, transition, and stretch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBulk EC 0–20,000 µS\/cm:\u003c\/strong\u003e Reads the full feed range — ±(5% + 10 µS\/cm) up to 10,000 µS\/cm, ±8% above.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSDI-12 V1.3 Output:\u003c\/strong\u003e Wires to canopyLINK over M8 or to the Precision Irrigation Controller (PIC) on the 30 ft cable variant.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP68, Stainless + Epoxy:\u003c\/strong\u003e Stainless steel rod sealed in epoxy resin holds up in coco runoff, rockwool slurry, and high-salt drainback.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"text-align: justify;\"\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #333; color: #fff;\"\u003e\n\u003cth style=\"padding: 8px; text-align: left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding: 8px; text-align: left;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eTechnology\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eTime Domain Reflectometry (TDR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eVWC Range \/ Accuracy\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e0.0–1.0 m³\/m³ — ±0.02 (0–53%), ±0.04 (53–100%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eBulk EC Range \/ Accuracy\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e0–20,000 µS\/cm — ±(5% + 10 µS\/cm) to 10,000; ±8% above; 1 µS\/cm resolution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eTemperature Range \/ Accuracy\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-40 to 85 °C — ±0.4 °C (-40 to 0), ±0.3 °C (0 to 85); 0.10 °C resolution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eOutput Interface\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSDI-12 V1.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003ePower Supply\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e3.6–16 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eCable \/ Connector\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2 m cable, M8 connector (canopyLINK); 30 ft \/ 9 m variant for PIC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eM8 Pinout\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003ePin 1 = 12V (Red), Pin 2 = Signal (White), Pin 3 = Ground (Bare)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eBuild\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eStainless steel rod, epoxy resin seal, IP68\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eCompatible Hosts\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eGrowlink canopyLINK, Precision Irrigation Controller (PIC), Crop Steering Copilot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eMedia Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eRockwool, coco coir, peat blends (avoid perlite\/clay-pebble mixes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Growlink","offers":[{"title":"Default Title","offer_id":48240874684630,"sku":"GL-LINK-TERRALink","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0723\/9450\/6454\/files\/Growlink_Terralink_Substrate_Sensor_main_image.webp?v=1778630087","url":"https:\/\/growershouse.com\/products\/growlink-terralink-w-m8-adapter-for-canopylink","provider":"GrowersHouse","version":"1.0","type":"link"}