Apogee SQ-500 Quantum Sensor

$969.00

Apogee Instruments’ new Quantum Sensor, the SQ-500, has an improved spectral response, providing accurate PAR/PPFD measurements under all light sources, including LEDs.

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Apogee Instruments’ new Quantum Sensor, the SQ-500, has an improved spectral response, providing accurate PAR/PPFD measurements under all light sources, including LEDs.

Rugged Design: The head is submersible and suitable for use in all climate conditions. Patented domed shaped sensor head (diffuser and body) facilitate runoff of dew and rain to keep the sensor clean and minimize errors caused by dust blocking the radiation path. Sensors are housed in a rugged anodised aluminium body and electronics are fully potted.

Excellent Cosine Response: Sensors measure PPFD with a cosine response accurate within ±5% at 75° zenith angle.

Refined Spectral Response: The improved spectral response of the SQ-500 increases the accuracy of LED measurements, making it ideal for use with both natural and electric light sources.

Accurate, Stable Measurements: Calibration in controlled laboratory conditions is traceable to a NIST lamp. Quantum sensors are cosine-corrected, with directional errors less than ± 5% at a solar zenith angle of 75°. Long-term non-stability, determined from multiple replicate quantum sensors in accelerated aging tests and field conditions, is less than 2% per year.

Typical Applications: 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 PPFD in aquatic environments, including salt water aquariums where corals are grown.

Weight 0.5 kg
Dimensions 15 × 15 × 10 cm