FLOX (FLuorescence bOX)
FLOX is an automated field spectroscopy device capable of collecting unattended, continuous, long-term hyperspectral measurements.
It represents the evolution of prototypes such as Multiplexer Radiometer Irradiometer (MRI) , SFLUOR box  and SIF-System  developed from a collaboration between Jülich Research Center and the Remote Sensing of Environmental Dynamics Laboratory of the University Milano Bicocca. The basic routines of FLOX are based on SPECY (Forschungszentrum Jülich, IBG-2: Plant Sciences).
FLOX is specifically designed to passively measure Chlorophyll fluorescence induced by sun, under natural light conditions. Therefore the design is optimized in order to achieve maximum efficiency in terms of: Signal to Noise Ratio, Spectral Resolution and quick acquisition time. The core of the system is the QEPro spectrometer from Ocean Optics covering the Red/Near Infrared region (650 – 800 nm). This is the spectral range where Chlorophyll fluorescence is emitted and where the two atmospheric oxygen absorption bands (O2B and O2A, at 689 nm and 760 nm respectively) can be used to measure it. Upward and downward channels of FLOX allow to sequentially measure the solar irradiance and the reflected radiance from the canopy. In order to keep a stable level of dark current the spectrometers are embedded in a temperature controlled housing. The signal-to-noise is maximized thanks to accurate automatic optimization of the signal of both channels.
For more information about FLOX Specifications download the product info.
|Wavelength range||650—800 nm|
|Spectral Sampling Interval (SSI)||0.17 nm|
|Spectral resolution (FWHM)||0.3 nm|
|Signal to Noise Ratio (SNR)||1000|
|Field Of View (FOV)||Dual FOV. Upwelling radiance 25°. Downwelling radiance 180°|
|Signal Optimization||Automatic adaption to varying light conditions|
|Dark current||Accurate dark current determination at each measurement cycle|
|Manual acquisition||Interface software for manual measurement and calibration|
|Automatic acquisition||Fully autonomous measurement mode for unattended data acquisition|
|Quick measurements||20 seconds under bright sunshine 60 seconds in overcast conditions|
|Stability||Reference system stability check and uncertainty estimates|
|Simultaneous metadata||Spectrometer temperature, Outside temperature, GPS position, GPS time|
|Data Display||Live assessment of the systems status|
|Data storage||SD card up to 64 GB (12 months of measurements)|
|Case||Robust and Waterproof housing based on the 1510 Pelicase|
|Dimension||Small form factor (50 x 30 x 20 cm) suitable as plane hand luggage|
|Power supply||12 Volt. From battery and solar panels|
|Power consumption||Average consumption of 60 Watt. (20 / 100 Watt, cooling on / off)|
|Energy saver||Day/night switch for energy saving|
|Second spectrometer||Additional spectrometer covering Visible Near Infrared or Shortwave Infrared|
|Fiber optics||Flexible length of fiber optics according to user needs|
|Field use||Backpack option including small battery packs|