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Photosynthetic
Plants use of sunlight to convert CO2 into organic matter.
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product
Underwater Quantum/PAR Sensors
Photosynthetic radiation is essential for the growth of the photosynthetic organisms such as corals. The wavelength range from 400 to 700 nm is PAR (Photosynthetically Active Radiation) or PPFD (Photosynthetic Photon Flux Density). Apogee quantum/PAR sensors are calibrated to measure the number of photons of light across this range.
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Portable Photosynthesis System
LI-6800
The LI-6800 Portable Photosynthesis System simultaneously measures photosynthetic gas exchange and chlorophyll a fluorescence over the same area in plants and aquatic samples, revealing additional insights into photobiology. Highly extendable, it is capable of measuring gas exchange from soil, insects, and many other sample types for countless experiments.
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Line Quantum Sensor
LI-191R
The LI-191R Line Quantum Sensor measures PAR integrated over its 1-meter length. It is used to measure sunlight under a plant canopy, where the light field is non-uniform. The LI-191R makes it easy to measure under-canopy light in many plots quickly and consistently. It measures light in units of Photosynthetic Photon Flux Density (PPFD), which is expressed as μmol s-1 m-2.
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Spherical Underwater Quantum Sensor
LI-193
The LI-193 Spherical Quantum Sensor measures PAR in air or underwater from all directions at depths up to 350 meters. This sensor is useful for studies of phytoplankton, which uses radiation from all directions. The measurement is referred to as Photosynthetic Photon Flux Fluence Rate (PPFFR) or Quantum Scalar Irradiance.
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Underwater Quantum Sensor
LI-192
The LI-192 Underwater Quantum Sensor measures PAR from all angles in one hemisphere. The LI-192 works in air or underwater at depths up to 560 meters. The measurements are cosine corrected and typically expressed as Photosynthetic Photon Flux Density (PPFD). For simultaneous measurements of downwelling and upwelling PAR, two sensors can be mounted on the 2009S Lowering Frame.
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Water quality profiler with optical fast DO sensor
AAQ-RINKO
The water quality profiler, AAQ 1183 has been redesigned as AAQ-RINKO with an optical fast response (63% response in water, 0.4 s) DO sensor, RINKO. Conventional water quality profilers with a slow response DO sensor require holding the instrument for a certain period at the measurement depths. AAQ-RINKO makes vertical measurements possible with a profiling speed of 0.5 m/s, similar to CTD observation, thereby significantly reducing the observation time. In addition to conductivity, temperature, depth, chlorophyll, turbidity, DO and pH, AAQ-RINKO also enables simultaneous installation of PAR (Photosynthetic Available Radiation) and ORP (Oxidation Reduction Potential) sensors. The processing unit is available in three types in accordance with the observation applications.
