{"product_id":"apogee-sq-522-ss-full-spectrum-quantum-par-sensor-with-modbus-output","title":"Apogee SQ-522-SS | Full-Spectrum Quantum PAR Sensor with Modbus Output","description":"\u003ch2\u003eApogee SQ-522-SS — Full-Spectrum Quantum PAR Sensor with Modbus Digital Output\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eApogee SQ-522-SS\u003c\/strong\u003e is a professional-grade, full-spectrum quantum PAR sensor designed for accurate and continuous PPFD measurement across all light sources — including narrow-band LEDs. Built for commercial growers, researchers, and greenhouse engineers who need data they can trust, the SQ-522-SS outputs a digital signal via \u003cstrong\u003eModbus RTU protocol\u003c\/strong\u003e over RS-232 or RS-485, making it ideal for integration with dataloggers, controllers, and building management systems.\u003c\/p\u003e\n\n\u003cp\u003eWith a \u003cstrong\u003espectral range of 389–692 nm (±5 nm)\u003c\/strong\u003e, the SQ-522's full-spectrum response significantly outperforms traditional quantum sensors when measuring LED grow lights — giving you accurate readings rather than misleading estimates.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e🌱 \u003cstrong\u003eFull-spectrum quantum sensor\u003c\/strong\u003e — spectral range 389–692 nm ±5 nm for accurate LED PAR measurement\u003c\/li\u003e\n  \u003cli\u003e📡 \u003cstrong\u003eModbus RTU digital output\u003c\/strong\u003e — RS-232 or RS-485 compatible, PPFD returned in digital format\u003c\/li\u003e\n  \u003cli\u003e🏗️ \u003cstrong\u003eRugged self-cleaning housing\u003c\/strong\u003e — anodized aluminium body with cast acrylic diffuser\u003c\/li\u003e\n  \u003cli\u003e🔌 \u003cstrong\u003ePre-tinned pigtail leads\u003c\/strong\u003e — easy connection to dataloggers and controllers\u003c\/li\u003e\n  \u003cli\u003e📏 \u003cstrong\u003eNIST-traceable calibration\u003c\/strong\u003e — sensor-specific calibration coefficients programmed at the factory\u003c\/li\u003e\n  \u003cli\u003e💧 \u003cstrong\u003eSuitable for aquatic environments\u003c\/strong\u003e — including salt water aquariums and coral growing\u003c\/li\u003e\n  \u003cli\u003e☀️ \u003cstrong\u003eMinimal azimuth error\u003c\/strong\u003e — typically less than 0.5%\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003ePPFD measurement over plant canopies in greenhouses, growth chambers, and outdoor environments\u003c\/li\u003e\n  \u003cli\u003eReflected and under-canopy (transmitted) PPFD measurement\u003c\/li\u003e\n  \u003cli\u003eCommercial and research greenhouse facility monitoring (e.g. Syngenta, Embrapa-scale installations)\u003c\/li\u003e\n  \u003cli\u003eMulti-zone PAR measurement integrated with dataloggers and environmental controllers\u003c\/li\u003e\n  \u003cli\u003eAquatic PAR measurement — coral growth, saltwater aquariums\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e Modbus RTU (RS-232 \/ RS-485)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpectral Range:\u003c\/strong\u003e 389–692 nm (±5 nm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHousing:\u003c\/strong\u003e Anodized aluminium with acrylic diffuser\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCalibration:\u003c\/strong\u003e NIST-traceable, factory-programmed sensor-specific coefficients\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAzimuth Error:\u003c\/strong\u003e \u0026lt;0.5%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCable:\u003c\/strong\u003e High-quality, pre-tinned pigtail leads\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Compatible with Apogee AL-120 solar mounting bracket (sold separately)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eApogee SQ-522-SS Quantum Sensor\u003c\/li\u003e\n  \u003cli\u003eCable with pre-tinned pigtail leads\u003c\/li\u003e\n  \u003cli\u003eProtective blue cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eDatalogger, mounting bracket, and controller sold separately. Requires a Modbus-compatible measurement device supporting the Read Holding Registers (0x03) function.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy From The Hydro Bros?\u003c\/h2\u003e\n\n\u003cp\u003eWe supply professional-grade horticultural equipment to commercial growers, research facilities, and serious hobbyists across the UK and internationally. Need a quote for multiple units or a commercial project? \u003cstrong\u003eGet in touch with our team directly\u003c\/strong\u003e and we'll put together a tailored quotation for you.\u003c\/p\u003e","brand":"Apogee Instruments","offers":[{"title":"Default Title","offer_id":57322262790517,"sku":"13073","price":592.0,"currency_code":"CHF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/files\/full-spectrum-digital-front__90557.1581703778.220.220.jpg?v=1782677821","url":"https:\/\/www.thehydrobros.com\/en-ch\/products\/apogee-sq-522-ss-full-spectrum-quantum-par-sensor-with-modbus-output","provider":"The Hydro Bros","version":"1.0","type":"link"}