{"product_id":"growlink-quantum-light-sensor","title":"Growlink Quantumlink Full-Spectrum PAR Sensor | PPFD, DLI + Lux | M8","description":"\u003ch2\u003eThe Growlink Quantum Light Sensor Logs PPFD and DLI at Canopy Height\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003eThe Quantumlink is a fixed quantum sensor for the Growlink LINKS system. It stays mounted at the canopy instead of riding around in a back pocket. The head reads photosynthetic photon flux density from \u003cstrong\u003e0 to 5,000 µmol·m⁻²·s⁻¹\u003c\/strong\u003e across a \u003cstrong\u003e400–750 nm\u003c\/strong\u003e window. That reach runs a little past the classic 400–700 nm PAR band, so far-red from modern LED bars gets counted. The same head also reports \u003cstrong\u003e0–250,000 lux\u003c\/strong\u003e, color temperature from \u003cstrong\u003e0 to 10,000 K\u003c\/strong\u003e and flicker frequency up to \u003cstrong\u003e120 Hz\u003c\/strong\u003e. PPFD is the number plants respond to, while lux and color temperature help when matching fixtures after a lamp swap. GrowlinkOS turns the running PPFD log into a daily light integral, the photon total from lights-on to lights-off. As a reference, 900 µmol held for 12 hours works out to about \u003cstrong\u003e38.9 mol·m⁻²·d⁻¹\u003c\/strong\u003e. Watching that total, not a single noon reading, shows whether a dimming schedule or a gray greenhouse day shorted the crop. Connection is one \u003cstrong\u003eM8\u003c\/strong\u003e lead into a canopyLINK or a LINKS HUB, with a hold-to-reset button on the face.\u003c\/p\u003e\n\u003ch2\u003eWhere a Fixed PAR Sensor Earns Its Place in the Grow Room\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003ePlacement is most of the job with any canopy sensor. Set the head level and facing straight up at the top of the plants, then raise it as the crop stretches into early flower. A sensor left at the old height reads lower than the tops actually receive, and the log drifts away from what the plants see. Because one head reports one spot, many growers walk it bed to bed during the first week of a run. That pass maps the hot spots under fixture centers and the dead zones along walls and aisles. Once the map looks even, the sensor goes back to a representative position and logs from there for the rest of the cycle. GrowlinkOS alerts then flag a drop in intensity, which can point to a failed driver, a dimming change or a bumped fixture. A flicker reading that departs from the room's normal pattern is worth a look at that fixture's driver. Greenhouse teams lean on the daily total most, since it shows how much supplemental light a gray day really needs. Keep the diffuser clean, because dust, spray residue and fingerprints read as lower light and can push a controller to overcorrect. It reports nothing without a canopyLINK or LINKS HUB and a GrowlinkOS account, so it belongs in rooms already running Growlink hardware. It is a fixed logger rather than a handheld wand, so a quick spot check across several rooms still means moving it by hand.\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\u003eFull-Spectrum PAR:\u003c\/strong\u003e PPFD measured across 400–750 nm keeps LED, HPS and mixed rooms on one comparable scale.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDLI Tracking:\u003c\/strong\u003e Daily light integral is calculated in GrowlinkOS, so light delivery stays consistent cycle to cycle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCanopy Mapping:\u003c\/strong\u003e Moving the head bed to bed exposes hot spots and dead zones before they show up in the plants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Metric Head:\u003c\/strong\u003e PPFD, lux, color temperature and flicker frequency all come from one sensor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnergy Right-Sizing:\u003c\/strong\u003e Logged PPFD shows where fixture output can come down without shorting the crop.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM8 Plug-and-Play:\u003c\/strong\u003e One M8 lead connects to a canopyLINK or LINKS HUB, and the sensor appears in the platform.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrowlinkOS Logging:\u003c\/strong\u003e Continuous monitoring, alerts and history sit alongside the rest of the room data.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width: 100%; max-width: 760px; margin: 0 auto 16px; border-collapse: collapse; font-size: 14px; line-height: 1.4;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #333; color: #fff;\"\u003e\n\u003cth style=\"padding: 7px 10px; text-align: left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding: 7px 10px; 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: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top; width: 38%; font-weight: bold;\"\u003eBrand \/ Model\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top;\"\u003eGrowlink Quantumlink\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top; width: 38%; font-weight: bold;\"\u003eSKU\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top;\"\u003eGL-LINK-QUANTUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top; width: 38%; font-weight: bold;\"\u003eSensor Type\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top;\"\u003eFull-spectrum quantum (PAR) sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top; width: 38%; font-weight: bold;\"\u003ePPFD Range\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top;\"\u003e0–5,000 µmol·m⁻²·s⁻¹\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top; width: 38%; font-weight: bold;\"\u003eSpectral Range\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top;\"\u003e400–750 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top; width: 38%; font-weight: bold;\"\u003eLux Range\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top;\"\u003e0–250,000 lux\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top; width: 38%; font-weight: bold;\"\u003eColor Temperature\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top;\"\u003e0–10,000 K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top; width: 38%; font-weight: bold;\"\u003eFlicker Frequency\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top;\"\u003e0–120 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top; width: 38%; font-weight: bold;\"\u003eCalculated Metric\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top;\"\u003eDaily light integral (DLI) in GrowlinkOS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top; width: 38%; font-weight: bold;\"\u003eLighting Types\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top;\"\u003eLED, HPS, metal halide and mixed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top; width: 38%; font-weight: bold;\"\u003eConnector\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top;\"\u003eM8, to canopyLINK or LINKS HUB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top; width: 38%; font-weight: bold;\"\u003ePlatform\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top;\"\u003eGrowlinkOS monitoring, logging and alerts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top; width: 38%; font-weight: bold;\"\u003eControls\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top;\"\u003eReset button (hold)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top; width: 38%; font-weight: bold;\"\u003eMade In\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 10px; border-bottom: 1px solid #eee; vertical-align: top;\"\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Growlink","offers":[{"title":"Default Title","offer_id":67807921111254,"sku":"GL-LINK-QUANTUM","price":399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0723\/9450\/6454\/files\/growlink-quantumlink-par-light-sensor-1050.webp?v=1793205651","url":"https:\/\/growershouse.com\/products\/growlink-quantum-light-sensor","provider":"GrowersHouse","version":"1.0","type":"link"}