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|The Sensor measures:||PAR Light|
|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.
Apogee Instruments quantum sensors measure photosynthetic light levels in both air and water, combining accuracy and durability at an affordable price. The sensor heads feature a unique blue diffuser that reduces spectral error to less than 5% for sunlight (direct, diffuse, under plant canopy, reflected from plant canopy) and common electric plant lights (fluorescent, metal halide, high pressure sodium), and less than 10 % for LEDs (blue, green, red, cool white, neutral white, and warm white). You can read more about using our quantum sensors with various light sources in our Knowledge Base.
Apogee’s quantum sensors are the culmination of over 16 years of field-testing and feedback from researchers worldwide. The sensor heads are potted solid with no internal air space for use in all climate conditions. In addition, all Apogee designs are subjected to brutal accelerated aging tests to ensure reliability and precision even under the harshest of conditions.
Each Apogee quantum sensor is carefully pre-calibrated to NIST standards in carefully controlled conditions. Our stock models are ready to go out of the box and come in several configurations readily compatible with most data-loggers. Our custom options can provide maximum flexibility by offering different multipliers, outputs, and cable lengths. With Apogee, you are dealing directly with the manufacturer and we can work with you to deliver quantum sensors that fit your specific application.
For reference, a quantum refers to the amount of energy carried by a photon. Quantum meters approximate the quantity of photons between 400 and 700 nanometers. Photosynthesis is largely driven by the number of photons between these wavelengths. Photosynthetically Active Radiation (PAR) is also called the Photosynthetic Photon Flux (PPF) or Photosynthetic Photon Flux Density (PPFD) and the units are μmol m-2 s-1 (micromoles of photons per meters squared per second).