SQ-215 : Amplified 0-5 Volt Sun Calibration Quantum Sensor

The SQ-215 is an amplified original quantum sensor with a 0 to 5 V output that has been calibrated for use in sunlight.

  • Product Name:Amplified 0-5 Volt Sun Calibration Quantum Sensor
  • Item No.:SQ-215
  • Manufacturers:Apogee
  • Country of Origin:USA

The SQ-215 is an amplified original quantum sensor with a 0 to 5 V output that has been calibrated for use in sunlight. The sensor features a rugged, self-cleaning sensor housing design. Typical applications include PPFD (Photosynthetic Photon Flux Density) 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 (Photosynthetically Active Radiation)/PPFD in aquatic environments, including salt water aquariums where corals are grown. Sensor includes IP67 marine-grade stainless-steel cable connector 30 cm from head to simplify sensor removal and replacement for maintenance and recalibration.

Power Supply    5.5 to 24 V DC; current draw 10 µA

Sensitivity    2 mV per µmol mˉ² sˉ¹

Calibration Factor    0.5 µmol mˉ² sˉ¹ per mV (reciprocal of sensitivity)

Calibration Uncertainty    ± 5 %

Calibrated Output Range    0 to 5 V

Measurement Repeatability    Less than 0.5 %

Non-stability (Long-term Drift)    Less than 2 % per year

Non-linearity    Less than 1 % (up to 2500 µmol mˉ² sˉ¹; maximum PPFD measurement is 2500 µmol mˉ² sˉ¹)

Response Time    Less than 1 ms

Field of View    180˚

Spectral Range    410 nm to 655 nm (wavelengths where response is greater than 50 % of maximum)

Spectral Selectivity    Less than 10 % from 469 to 655 nm

Directional (Cosine) Response    ± 5 % at 75˚ zenith angle

Temperature Response    0.06 ± 0.06 % per C

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, 28 mm height

Mass    100 g (with 5 m of lead wire)

Cable    5 m of shielded, twisted-pair wire with TPR jacket (high water resistance, high UV stability, flexibility in cold conditions)

Warranty    4 years against defects in materials and workmanship