Showing results: 1 - 3 of 3 items found.
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Apogee Instruments, Inc.
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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ML-series -
EKO Instruments Co., Ltd.
The ML-series small sensors are used as multi-purpose cost effective sensors for qualitative radiation measurements in the fields of photovoltaics, horticulture, agriculture and industry. Those compact all-weather sensors rely on a passive high quality detector. Based on the integral construction of each sensor type, irradiance (W/m2), illuminance (Lux) or photosynthetic photon flux density (mol/m2/s) can be measured. All sensors have an optical quality glass dome which minimizes the soiling of the diffusor and optimizes the cosine response. Within the operating temperature range, the ambient temperatures has a rather small effect on the sensor output and makes it a reliable sensor under varying environmental conditions. The compact dimensions of the sensor body make it easy to integrate to any type of applications. For mounting the sensor in an horizontal position, an optional mounting plate is available.
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Photo Emission Tech., Inc.
QE system provides electronics and software designed for fully automated measurement of external quantum efficiency of solar cells. All systems include probes and a fixed plate sample stage for samples up to 150 mm x 150 mm. The main system components include: custom designed software, measurement electronics, and computer system (Windows 8 operating system). The measurement involves focusing monochromatic light to a spot on the device under test, then accurately measuring the photon flux and current from the test cell. The system utilizes a dual beam configuration with lock-in detection, providing an absolute accuracy of ±3%. The QE system uses a grating monochrometer with silicon/InGaAs/Ge detectors. The system includes automatic order sorting filters and two light sources for monochromatic illumination (a Xenon- arc lamp and a halogen lamp). A single lock-in amplifier is used to measure both the reference detector and test device. The main system comes with all the hardware needed to measure quantum efficiency, a fixed plate sample stage and probes.
