SQ-500: Full-Spectrum Quantum Sensor

$295.00

The SQ-500 is a self-powered, analog full-spectrum quantum sensor with a 0 to 40 mV 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.

How is the SQ-500 differentfrom previous Apogee quantum sensors?

The SQ-500 is a full spectrum quantum sensor with a spectral range of 389 to 692 nm ± 5 nm, which can be seen in the graph below. This improved spectral respose increases the acuracy of LED measurements.
SQ-500 & SQ-100 Spectral Response
Where is the SQ-500 used?

The SQ-500 is used to measure incoming PPFD measurements in outdoor environments, greenhouses, growth chambers, and aquariums.
Full Description

The SQ-500 is a self-powered, analog full-spectrum quantum sensor with a 0 to 40 mV 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.

How is the SQ-500 differentfrom previous Apogee quantum sensors?

The SQ-500 is a full spectrum quantum sensor with a spectral range of 389 to 692 nm ± 5 nm, which can be seen in the graph below. This improved spectral respose increases the acuracy of LED measurements.
SQ-500 & SQ-100 Spectral Response
Where is the SQ-500 used?

The SQ-500 is used to measure incoming PPFD measurements in outdoor environments, greenhouses, growth chambers, and aquariums.
Determining Grow Light Position Using a PAR Meter
Full-spectrum quantum sensor used to measure the PPFD output of grow lights to create PAR intensity maps of a grow area. The PAR intensity map is then used to determine how far the grow lights should be positioned from the crop for maximum yield.

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Current Stock:
Power Supply Self-powered Output (Sensitivity) 0.01 mV per µmol mˉ² sˉ¹ Calibration Factor (Reciprocal of Sensitivty) 100.0 µmol mˉ² sˉ¹ per mV Calibration Uncertainty ± 5 % Calibrated Output Range 0 to 40 mV 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 ˚ 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 ˚ 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