Apogee Instruments SQ-520: Full-Spectrum Smart Quantum Sensor (USB) with Apogee Instruments Neoprene Case

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About This DR BRUCE BUGBEE: Apogee PAR sensors have been designed and refined by Dr. Bruce Bugbee, a world-famous crop physiologist. PREMIUM QUALITY: The SQ-520 is preferred by sci entists and serious growers for accurate PAR measurements. Our sensors stay accurate and reliable while other budget PAR sensors can have readings drift by over 50%. FEATURES: USB-compatible smart quantum sensor connects directly to a computer (Windows or macOS X) for spot measurements, real-time PPFD graphing, and datalogging with ApogeeConnect software. It also functions as a stand-alone PAR datalogger by connecting to most standard 5V DC USB power plugs. The sensor head's internal memory stores up to 10,000 user-defined periodic measurements, downloadable as a CSV file for computer analysis. HIGHLY ACCURATE & STABLE: This sensor precisely measures photon intensity between 400 and 700 nm, providing a single PAR reading in µmol m-2 s-1 within 5% uncertainty. Its calibration maintains stability with an accuracy drift rate of less than 2% per year, unlike hobby-grade PAR sensors. MANUFACTURED IN THE USA: All sensors are backed by our four-year warranty and supported by our US-based customer support team Show more