Total ePAR and ePFD intensity measurements over plant canopies in all growing environments, monitor and adjust grow lights, research plant morphogenic activity, and photobiology studies.
Accurate, Stable Measurements
Sensors are cosine-corrected to maintain their accuracy when radiation comes from low zenith angles. The sensors measure PFD with a cosine response accurate within ± 5 % at 75° zenith angle. Long-term non-stability determined from multiple replicate quantum sensors in accelerated aging test and field conditions are less than 2 % per year.
Rugged, Self-cleaning Housing
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 anodized aluminium body and electronics are fully potted.
To ensure accuracy each sensor is carefully calibrated in controlled conditions and traceable to NIST reference standards. The extended sensors are pre-calibrated for all light sources, though it is recommended SQ-620 series (ePFD) sensors are only used under LEDs.
The AL-120 Solar Mounting Bracket with Leveling Plate facilitates mounting the sensor to a mast or pipe. The AL-100 Solar Sensor Leveling Plate is designed to level the sensor while sitting on a flat surface or mounting to a surface.
Available in multiple analog output options including 0 to 40 mV, 0 to 2.5 V, 0 to 5 V, and 4 to 20 mA ranges. Digital output options include a digital “smart” sensor that uses USB communication and custom software to interface directly to a computer, SDI-12, and Modbus protocols. Sensors are also available attached to a hand-held meter with digital readout. The analog versions of these sensors (SQ-610, SQ-620) work with our µCache Bluetooth Micro Logger.
Pigtail-lead sensors feature an IP68, marine-grade stainless-steel cable connector approximately 30 cm from the head to simplify sensor removal for maintenance and recalibration. The cable is shielded-twisted pair wire with a TPR jacket for high water resistance, UV stability, and flexibility in cold conditions.
PPFD measurements over plant canopies in outdoor environments, greenhouses, and growth chambers.
Reflected or under-canopy (transmitted) PPFD measurements in outdoor environments, greenhouses, and growth chambers.
All Apogee products are backed by an industry-leading 4-year warranty.
Green Houston is an official distributor for all Apogee instruments in Africa, imported directly from the USA.
Please contact firstname.lastname@example.org for all Apogee sensors and variants.