SQ-202X-SS Apogee Amplified 0-2.5 Volt Original Quantum PAR Light Sensor View larger

SQ-202X-SS Apogee Amplified 0-2.5 Volt Original Quantum PAR Light Sensor


Apogee Instruments


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Amplified 0-2.5 Volt Original Quantum

365,00 €

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The Sensor measures: PAR Light
Output Signal: mV
Cable Length: 5 meters
Power Supply: 2,5 to 24 Vdc
Sensor for use in: Outdoor & Underwater

The SQ-212 is an amplified quantum sensor that measures photosynthetically active radiation and is calibrated for use in sunlight. The sensor housing design features a fully potted, domed-shaped head making the sensor fully weatherproof and self-cleaning. Photosynthetically active radiation (PAR), or photosynthetic photon flux (PPF), is the wavelength range from 400 to 700 nanometers and is strongly correlated with plant growth. Gardeners, greenhouse managers, growth chamber users and salt-water aquarists measure PAR to insure optimal specimen health.

Sensor Apogee SQ-212, (400-700 nm) with output in µmol m-2 s-1 with 5m cable, & screw for the leveling base.
Designed for use with dataloggers
SQ-212: Calibrated for solar light. SQ-222: Calibration for electric light.
Optional conector for HOBO data loggers.

Photosynthesis is driven by the number of photons between 400 and 700 nanometers (nm).
This is called the Photosynthetic Photon Flux (PPF) and is measured in μmol m-2 s-1 (micromols of photons per square meter per second). PPF sensors are commonly called quantum sensors because a quantum refers to the amount of energy carried by a photon.

Also available Line Quantum Sensor Apogee SQ-300, designed for use with dataloggers.
Line quantum sensors are often used to quantify the variable light in greenhouses and below plant canopies because they provide a spatial average.

Power Supply: 2.5-24 VDC with a nominal current draw of 300 µA
Sensitivity: 2.0 mV per µmol m-2 s-1
Calibration Factor: 0.5 µmol m-2 s-1 per mV (reciprocal of sensitivity)
Calibration Uncertainty: ± 5%
Measurement Repeatability: < 1%
Non-stability (Long-term Drift): < 2 % per year
Non-linearity: < 1 % (up to 2500 µmol m-2 s-1; maximum PPF measurement is 2500 µmol m-2 s-1)
Response Time: < 1 ms
Field of View: 180°
Spectral Range: 410 nm 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: 2.4 cm diameter and 2.8 cm height
Mass: 90 g (with 5 m of lead wire)
Cable: 5 m of shielded, twisted-pair wire. Santoprene rubber jacket (high water resistance, high UV stability, flexibility in cold conditions). Pigtail lead wires
Warranty: 4 years

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