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ApogeeInstruments

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

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

$724.61 USD
$724.61 USD
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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 scientists 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
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Customers are saying

4.7 ★ (127 reviews) · Verified Buyer
  • ⭐⭐⭐⭐⭐
    The sofa looks amazing in my living room. The fabric feels high quality and it’s more comfortable than I expected. Definitely worth the price.

    James R.

    ⭐⭐⭐⭐⭐
    Very sturdy and easy to assemble. The wood finish looks natural and fits perfectly with my other furniture.

    Emily K.

    ⭐⭐⭐⭐☆
    Solid frame and no noise at all when sleeping. Took a bit of time to assemble but overall very satisfied.

    Michael T.

    ⭐⭐⭐⭐⭐
    Super comfortable. I’ve been sleeping much better since I got this. It’s firm but still soft enough.

    Sarah L.

  • ⭐⭐⭐⭐⭐
    Simple design and gives off a nice warm light. Perfect for evening atmosphere.

    Daniel W.

    ⭐⭐⭐⭐⭐
    The table and chairs are very well made. Looks even better in person and feels durable.

    Olivia M.

    ⭐⭐⭐⭐⭐
    Comfortable and stylish. I use it daily and it hasn’t shown any signs of wear.

    Chris J.

    ⭐⭐⭐⭐☆
    Spacious and practical. Took some effort to build but worth it.

    Brian K.

  • ⭐⭐⭐⭐⭐
    Plenty of storage space and looks clean. Helped organize my room a lot.

    Anna P.

    ⭐⭐⭐⭐⭐
    Compact but functional. The drawer slides smoothly and feels solid.

    David S.

    ⭐⭐⭐⭐☆
    Bright and modern. Installation was easy and it lights up the whole room nicely.

    Jessica H.

    ⭐⭐⭐⭐⭐
    Soft and comfortable underfoot. The color matches the pictures well.

    Ashley W.

Frequently Asked Questions

Orders are typically processed within 3–5 business days. Delivery usually takes 3–12 business days depending on your location.

Yes, we offer a 30-day return policy. Items must be unused, in original condition, and include original packaging.

Once your order has been shipped, you will receive a tracking number via email.

Please inspect your order upon arrival and contact us immediately if there is any issue. We will review the case and make it right.

Orders cannot be canceled once they have been processed. If you contact us before processing, cancellation may be possible.