SQ-512-SS Amplified 0-2.5 V Full-Spectrum Quantum Sensor

The SQ-512 is an amplified full-spectrum quantum sensor with a 0 to 2.5 V output. The sensor incorporates a blue-enhanced silicon photodiode and custom optical filters with a rugged, self-cleaning sensor housing design, anodized aluminum body with acrylic diffuser. Typical applications include PPFD measurement over plant canopies in outdoor environments, greenhouses, and growth chambers, and reflected or under-canopy (transmitted) PPFD measurements in the same environments. Quantum sensors are also used to measure PAR/PPFD in aquatic environments, including salt water aquariums where corals are grown. Sensor includes IP68 marine-grade stainless-steel cable connector 30 cm from head to simplify sensor removal and replacement for maintenance and recalibration.

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Specifications

  • Power Supply 3.3 to 24 V DC
  • Current Draw at 12 V is 57 µA
  • Output (Sensitivity) 0.625 mV per µmol mˉ² sˉ¹
  • Calibration Factor (Reciprocal of Sensitivty) 1.6 µmol mˉ² sˉ¹ per mV
  • Calibration Uncertainty ± 5 %
  • Calibrated Output Range 0 to 2.5 V
  • Measurement Range 0 to 4000 µmol mˉ² sˉ¹
  • Measurement Repeatability Less than 0.5 %
  • Long-term Drift Less than 2 % per year
  • Non-linearity Less than 1 % (up to 4000 µmol mˉ² sˉ¹)
  • Response Time Less than 1 ms
  • Field of View 180 Ëš
  • Spectral Range 389 to 692 nm ± 5 nm (wavelegths where response is greater than 50 % of maximum)
  • Spectral Selectivity Less than 10 % from 412 to 682 nm ± 5 nm
  • Directional (Cosine) Response ± 5 % at 75 Ëš zenith angle
  • Azimuth Error Less than 0.5 %
  • Tilt Error Less than 0.5 %
  • Temperature Response -0.11 ± 0.04 % Cˉ¹
  • Uncertainty in Daily Total Less than 5 %
  • Detector Blue-enhanced silicon photodiode
  • Housing Anodized aluminum body with acrylic diffuser
  • IP Rating IP68
  • Operating Environment -40 to 70 C, 0 to 100 % relative humidity, can be submerged in water up to depths of 30 m
  • Dimensions 24 mm diameter, 37 mm height
  • Mass 100 g (with 5 m of lead wire) Cable 5 m of shielded, twisted-pair wire with santoprene rubber jacket (high water resistance, high UV stability, flexibility in cold conditions)
  • Warranty 4 years against defects in materials and workmanship

 

Ordering information  

SQ-512-SS

sq-500-spec-sheet

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