{"product_id":"full-spectrum-quantum-sensor","title":"Full-Spectrum Quantum Sensor","description":"\u003ch1\u003eDescription\u003c\/h1\u003e\n\u003ch3\u003eMeasure photosynthetically active radiation, PAR, in µmol m\u003csup\u003e-2\u003c\/sup\u003e s\u003csup\u003e-1\u003c\/sup\u003e\n\u003c\/h3\u003e\n\u003cp\u003eApogee Instruments' quantum sensors provide accurate and cost-effective measurement of photosynthetically active radiation (PAR) from all light sources used to grow plants.\u003c\/p\u003e\n\u003cp\u003eApogee Instruments SQ series quantum sensors consist of a cast acrylic diffuser (filter), photodiode, and signal processing circuitry mounted in an anodized aluminium housing, and a cable to connect the sensor to a measurement device. Sensors are potted solid with no internal air space. SQ-500 series quantum sensors are designed for continuous PPFD measurement in indoor and outdoor environments.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003eFeatures\u003c\/h1\u003e\n\u003ch3\u003eSpectral Response\u003c\/h3\u003e\n\u003cp\u003eThe full-spectrum quantum sensor has a spectral range of 389 to 692 nm ± 5 nm. The improved spectral response increases the accuracy of LED measurements.\u003c\/p\u003e\n\u003cp\u003eThe spectral responses can be seen in the graph below:\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Quantum PAR light sensor from Apogee\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0344\/9087\/6044\/files\/testBanner2_13fac2b3-ba17-4dce-9769-11f68ed98c94.jpg?v=1607078858\" data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAccurate, Stable Measurements\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eSensors are cosine-corrected to maintain their accuracy when radiation comes from low zenith angles. The sensors measure PPFD with a cosine response accurate within ± 5 % at 75° zenith angle. Long-term non-stability determined from multiple replicate quantum sensors in accelerated aging test and field conditions is less than 2 % per year.\u003c\/p\u003e\n\u003ch3\u003eRugged, Self-Cleaning Housing\u003c\/h3\u003e\n\u003cp\u003ePatented domed shaped sensor head (diffuser and body) facilitates runoff of dew and rain to keep the sensor clean and minimize errors caused by dust blocking the radiation path. Sensors are housed in a rugged anodized aluminum body and electronics are fully potted.\u003c\/p\u003e\n\u003ch3\u003eIdeal for Measurements in Air and Underwater\u003c\/h3\u003e\n\u003cp\u003eApogee quantum sensor are calibrated to make absolute PPFD measurements in air. The waterproof sensors can be used to make absolute PPFD measurements underwater by applying an immersion effect correction factor, the SQ-420, SQ-520, MQ-210, and MQ-510 already apply the correction factor.\u003c\/p\u003e\n\u003ch3\u003eCalibration\u003c\/h3\u003e\n\u003cp\u003eTo ensure accuracy each sensor is carefully calibrated in controlled conditions and traceable to NIST reference standards. The full-spectrum sensors are pre-calibrated for all light sources.\u003c\/p\u003e\n\u003ch3\u003eMounting\u003c\/h3\u003e\n\u003cp\u003eThe AL-120 Solar Mounting Bracket with Leveling Plate facilitates mounting the sensor to a mast or pipe. The AL-100 Solar Sensor Leveling Plate is designed to level the sensor while sitting on a flat surface or mounting to a surface.\u003c\/p\u003e\n\u003ch3\u003eOutput Options\u003c\/h3\u003e\n\u003cp\u003eAvailable in multiple analog output options including 0 to 40 mV, 0 to 2.5 V, and 0 to 5 V. Additionally, a digital \"smart\" sensor that uses USB communication and custom software to interface directly to a computer is available. Sensors are also available attached to a hand-held meter with digital readout.\u003c\/p\u003e\n\u003ch3\u003eHigh Quality Cable\u003c\/h3\u003e\n\u003cp\u003ePigtail-lead sensors feature an IP68, marine-grade stainless-steel cable connector approximately 30 cm from the head to simplify sensor removal for maintenance and recalibration. Cable is shielded-twisted pair wire with a TPR jacket for high water resistance, UV stability, and flexibility in cold conditions.\u003c\/p\u003e\n\u003ch3 class=\"product-page-title\"\u003eWarranty\u003c\/h3\u003e\n\u003cp class=\"product-page-content\"\u003eAll Apogee products are backed by an industry-leading\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e4-year warranty.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1 class=\"product-page-content\"\u003e\n\u003cstrong\u003e\u003c\/strong\u003eApplications\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003ePPFD measurements over plant canopies in outdoor environments, greenhouses, and growth chambers.\u003c\/li\u003e\n\u003cli\u003eReflected or under-canopy (transmitted) PPFD measurements in outdoor environments, greenhouses, and growth chambers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0344\/9087\/6044\/files\/banner_ab8e8992-41ae-495e-bd14-c0a3a1f24a10.jpg?v=1607076707\" alt=\"Full Spectrum Quantum PAR sensor from Apogee\" data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003ch4\u003eHelpful tips\u003c\/h4\u003e\n\u003cp\u003ePAR is often expressed as photosynthetic photon flux density (PPFD): photon flux in units of micromoles per square meter per second (µmol m\u003csup\u003e-2\u003c\/sup\u003e s\u003csup\u003e-1\u003c\/sup\u003e, equal to microEinsteins per square meter per second) summed from 400 to 700 nm (total number of photons from 400 to 700 nm). While Einsteins and micromoles are equal (one Einstein = one mole of photons), the Einstein is not an SI unit, so expressing PPFD as µmol m\u003csup\u003e-2\u003c\/sup\u003e s\u003csup\u003e-1\u003c\/sup\u003e is preferred.\u003c\/p\u003e\n\u003cp\u003eSensors that measure PPFD are often called quantum sensors due to the quantized nature of radiation. A quantum refers to the minimum quantity of radiation, one photon, involved in physical interactions (e.g., absorption by photosynthetic pigments). In other words, one photon is a single quantum of radiation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eGreen Houston is an \u003c\/em\u003e\u003cem\u003eofficial\u003c\/em\u003e\u003cem\u003e \u003c\/em\u003e\u003cem\u003edistributor\u003c\/em\u003e\u003cem\u003e for all Apogee instruments in Africa, imported directly from the USA.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003ePlease contact office@greenhouston.co.za for all Apogee sensors and variants.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cmeta charset=\"utf-8\"\u003ePlease note: Apogee products are imported from the USA and due to the fluctuating exchange rate, prices are not fixed and may be subject to change. Requesting a quote before placing an order is highly recommended.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003eEducational videos\u003c\/h1\u003e\n\u003ch3\u003e\u003cspan\u003eWhy do I need a PAR-Quantum Meter?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003ciframe width=\"100%\" style=\"height: 50vh;\" src=\"https:\/\/www.youtube.com\/embed\/TszB2A3bdYc\"\u003e\u003c\/iframe\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIn-depth Look at PAR-Quantum Meters\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/TszB2A3bdYc\" style=\"height: 50vh;\" width=\"100%\"\u003e\u003c\/iframe\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003ePAR, PPF, PPFD, and PFD Explained\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ciframe width=\"100%\" src=\"https:\/\/www.youtube.com\/embed\/UZO8Fb0ryW8\" style=\"height: 50vh;\"\u003e\u003c\/iframe\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Apogee Instruments","offers":[{"title":"SQ-500-SS: Sensor \u0026 5m cable","offer_id":35204922900633,"sku":"","price":10459.0,"currency_code":"ZAR","in_stock":true},{"title":"SQ-500-SS-L-10: Sensor \u0026 10m cable","offer_id":35204931879065,"sku":"","price":11499.0,"currency_code":"ZAR","in_stock":false},{"title":"SQ-500-SS-L-20: Sensor \u0026 20m cable","offer_id":35204934205593,"sku":"","price":11899.0,"currency_code":"ZAR","in_stock":false},{"title":"SQ-520: Sensor \u0026 4.5m USB output","offer_id":35205017370777,"sku":"","price":12249.0,"currency_code":"ZAR","in_stock":false},{"title":"MQ-500: hand-held meter \u0026 2m cable","offer_id":35204639228057,"sku":"","price":14249.0,"currency_code":"ZAR","in_stock":false},{"title":"MQ-500-L5: hand-held meter \u0026 5m cable","offer_id":35204639260825,"sku":"","price":14579.0,"currency_code":"ZAR","in_stock":false},{"title":"MQ-501: handheld meter w\/ bracket \u0026 0.17m lead.","offer_id":35215536324761,"sku":"","price":15279.0,"currency_code":"ZAR","in_stock":false},{"title":"PQ-510: Sensor with Bluetooth micro-logger \u0026 2m cable","offer_id":35205481496729,"sku":"","price":15499.0,"currency_code":"ZAR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0344\/9087\/6044\/files\/SQ-500-SS_Front.png?v=1750671564","url":"https:\/\/greenwares.myshopify.com\/products\/full-spectrum-quantum-sensor","provider":"Green Houston","version":"1.0","type":"link"}