{"product_id":"trolmaster-wn-9-substrate-sensor-node","title":"TrolMaster WN-9 Substrate Sensor Node | VWC, EC \u0026 Temperature Probe","description":"\u003cp\u003eThe \u003cstrong\u003eTrolMaster WN9 Substrate Sensor Node\u003c\/strong\u003e is the dedicated sensing probe designed for use with the \u003ca\u003eTrolMaster WCS-9 Substrate Sensor System\u003c\/a\u003e. Engineered for professional cultivation environments, the WN-9 delivers highly accurate measurements of \u003cstrong\u003eVolumetric Water Content (VWC), Electrical Conductivity (EC) and root zone temperature\u003c\/strong\u003e, helping growers make better irrigation decisions and implement advanced crop steering strategies.\u003c\/p\u003e\n\u003cp\u003eWhether you're growing in Rockwool, coco, soil or other high-EC substrates, the WN-9 continuously monitors root zone conditions and feeds real-time data back to the WCS-9 Display for analysis, averaging and Feed On Demand irrigation control.\u003c\/p\u003e\n\u003cdiv style=\"background: #e8f5e9; border: 1px solid #b7dfbb; padding: 18px; border-radius: 6px; margin: 20px 0;\"\u003e\n\u003cstrong\u003e⚠️ Important Compatibility Information\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eThe WN-9 is NOT a standalone sensor.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis product is an expansion Sensor Node designed exclusively for use with the \u003ca href=\"https:\/\/www.thehydrobros.com\/products\/trolmaster-wcs-9-substrate-sensor\"\u003eTrolMaster WCS-9 Substrate Sensor System\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eTo operate, this Sensor Node must be connected to a WCS-9 Display.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 0;\"\u003e\u003cstrong\u003eIf you do not already own a WCS-9 Display, you will need the complete \u003ca href=\"https:\/\/www.thehydrobros.com\/products\/trolmaster-wcs-9-substrate-sensor\"\u003eWCS-9 Starter Kit\u003c\/a\u003e.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f6f8f9; border: 1px solid #d9dee2; padding: 18px; border-radius: 6px; margin: 20px 0;\"\u003e\n\u003cstrong\u003e📦 What's Included In This Listing?\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e1 × TrolMaster WN-9 Sensor Node\u003c\/li\u003e\n\u003cli\u003e1 × \u003ca href=\"https:\/\/www.thehydrobros.com\/products\/trolmaster-to-thinkgrow-12daisy-chain-control-cable-ecs-7\"\u003eECS-7 12ft Daisy Chain Cable\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin-bottom: 0;\"\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e WCS-9 Sensor Display is required (as well as a compatible controller)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWhat Does The WN-9 Sensor Node Do?\u003c\/h2\u003e\n\u003cp\u003eThe WN-9 is the measurement probe used within the WCS-9 ecosystem. Installed directly into the growing media, it continuously captures root zone data and transmits readings back to the WCS-9 Display.\u003c\/p\u003e\n\u003cp\u003eEach Sensor Node measures:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eVolumetric Water Content (VWC)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSubstrate EC\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eRoot Zone Temperature\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBy collecting accurate root zone information, growers can make more informed irrigation decisions, monitor dry-backs and optimise plant performance throughout the entire crop cycle.\u003c\/p\u003e\n\u003ch2\u003eExpand Your WCS-9 Monitoring System\u003c\/h2\u003e\n\u003cp\u003eOne of the biggest advantages of the WCS-9 platform is its multi-node architecture.\u003c\/p\u003e\n\u003cp\u003eTraditional substrate sensors only monitor a single location, which can often provide misleading information due to localised dry spots, irrigation channeling or nutrient hotspots.\u003c\/p\u003e\n\u003cp\u003eThe WN-9 allows growers to place multiple sensors throughout the crop, providing a much more representative picture of root zone conditions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUp to 4 WN-9 Sensor Nodes can be connected to a single WCS-9 Display.\u003c\/li\u003e\n\u003cli\u003eSensor Nodes connect together using \u003ca\u003eTrolMaster ECS-7 Daisy Chain Cables\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eThe WCS-9 Display automatically calculates average values across all connected nodes.\u003c\/li\u003e\n\u003cli\u003eIndividual node readings can also be viewed separately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis makes the system ideal for larger irrigation zones, multiple slabs, larger Rockwool blocks and commercial cultivation facilities.\u003c\/p\u003e\n\u003ch2\u003ePrecision Root Zone Monitoring\u003c\/h2\u003e\n\u003cp\u003eEach WN-9 Sensor Node uses durable stainless steel sensing spikes to continuously measure moisture and EC levels within the substrate.\u003c\/p\u003e\n\u003cp\u003eAn integrated temperature sensor is built directly into the probe, providing accurate root zone temperature monitoring alongside moisture and nutrient concentration data.\u003c\/p\u003e\n\u003cp\u003eThe result is verified root zone data that can be used to improve irrigation timing, monitor crop steering targets and optimise substrate performance.\u003c\/p\u003e\n\u003ch2\u003eIdeal For Feed On Demand Irrigation\u003c\/h2\u003e\n\u003cp\u003eThe WN-9 plays a critical role within TrolMaster's Feed On Demand irrigation strategy.\u003c\/p\u003e\n\u003cp\u003eBy providing live substrate moisture data, the sensor enables the WCS-9 and compatible TrolMaster controllers to automatically trigger irrigation events based on actual substrate conditions rather than relying solely on timers.\u003c\/p\u003e\n\u003cp\u003eThis allows growers to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eImprove irrigation precision.\u003c\/li\u003e\n\u003cli\u003eAchieve more consistent dry-backs.\u003c\/li\u003e\n\u003cli\u003eReduce overwatering.\u003c\/li\u003e\n\u003cli\u003eImplement advanced crop steering strategies.\u003c\/li\u003e\n\u003cli\u003eRespond dynamically to changing plant demand.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eScale Your System As You Grow\u003c\/h2\u003e\n\u003cp\u003eThe WN-9 has been designed with expansion in mind.\u003c\/p\u003e\n\u003cp\u003eAdditional Sensor Nodes can be added to existing WCS-9 installations as your facility grows, providing extra monitoring points without requiring a complete system replacement.\u003c\/p\u003e\n\u003cp\u003eFor larger installations, multiple WCS-9 Displays can be integrated into compatible TrolMaster systems using the \u003ca href=\"https:\/\/www.thehydrobros.com\/products\/trolmaster-rj12-splitter-hub-sph-1\"\u003eTrolMaster Hub\u003c\/a\u003e, allowing even greater monitoring capacity across multiple rooms and irrigation zones.\u003c\/p\u003e\n\u003ch2\u003eTrolMaster WN-9 Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned exclusively for the WCS-9 monitoring platform.\u003c\/li\u003e\n\u003cli\u003eMeasures VWC, EC and root zone temperature.\u003c\/li\u003e\n\u003cli\u003eSuitable for soil, coco, Rockwool and high-EC substrates.\u003c\/li\u003e\n\u003cli\u003eProfessional-grade stainless steel sensing probes.\u003c\/li\u003e\n\u003cli\u003eSupports advanced crop steering strategies.\u003c\/li\u003e\n\u003cli\u003eFeed On Demand irrigation compatible.\u003c\/li\u003e\n\u003cli\u003eDaisy-chain expandable architecture.\u003c\/li\u003e\n\u003cli\u003eIncludes ECS-7 12ft connection cable.\u003c\/li\u003e\n\u003cli\u003eAccurate root zone monitoring.\u003c\/li\u003e\n\u003cli\u003eCommercial cultivation ready.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #2d6a4f; color: #ffffff;\"\u003e\n\u003cth style=\"border: 1px solid #cccccc; padding: 10px; text-align: left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #cccccc; padding: 10px; text-align: left;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #cccccc; padding: 10px;\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #cccccc; padding: 10px;\"\u003eSubstrate Sensor Node\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #cccccc; padding: 10px;\"\u003eMeasurements\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #cccccc; padding: 10px;\"\u003eVWC, EC \u0026amp; Temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #cccccc; padding: 10px;\"\u003ePower Input\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #cccccc; padding: 10px;\"\u003e5V DC 0.1A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #cccccc; padding: 10px;\"\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #cccccc; padding: 10px;\"\u003e0-50°C (32-122°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #cccccc; padding: 10px;\"\u003eOperating Humidity\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #cccccc; padding: 10px;\"\u003e≤90% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #cccccc; padding: 10px;\"\u003eMeasurement Interval\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #cccccc; padding: 10px;\"\u003eEvery 1 Minute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #cccccc; padding: 10px;\"\u003eMaximum Nodes Per Display\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #cccccc; padding: 10px;\"\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eCan I use the WN-9 without a WCS-9 Display?\u003c\/h3\u003e\n\u003cp\u003eNo. The WN-9 is a Sensor Node only and requires a WCS-9 Display to operate.\u003c\/p\u003e\n\u003ch3\u003eHow many WN-9 sensors can I connect?\u003c\/h3\u003e\n\u003cp\u003eEach WCS-9 Display supports up to 4 WN-9 Sensor Nodes.\u003c\/p\u003e\n\u003ch3\u003eDoes this include the cable?\u003c\/h3\u003e\n\u003cp\u003eYes. This listing includes one ECS-7 12ft Daisy Chain Cable.\u003c\/p\u003e\n\u003ch3\u003eCan I monitor multiple pots or slabs?\u003c\/h3\u003e\n\u003cp\u003eYes. Multiple WN-9 Sensor Nodes can be installed throughout your crop and averaged by the WCS-9 system for more representative root zone monitoring.\u003c\/p\u003e\n\u003ch3\u003eWhat growing media is the WN-9 suitable for?\u003c\/h3\u003e\n\u003cp\u003eThe WN-9 is suitable for Rockwool, coco, soil and other high-EC soilless growing media.\u003c\/p\u003e","brand":"TROL MASTER","offers":[{"title":"Default Title","offer_id":57243981676917,"sku":"13025","price":165.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/files\/img-33a15efe687f42e7b8ae18797dad3868.jpg?v=1780433152","url":"https:\/\/www.thehydrobros.com\/de-de\/products\/trolmaster-wn-9-substrate-sensor-node","provider":"The Hydro Bros","version":"1.0","type":"link"}