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With the Geoptik Sky Quality Meter LU-DL it is possible to determine the quality of the dark sky present in the observing site in magnitudes per square second arch. But it is also possible to compare this data with other sites, or monitoring the evolution of the light pollution of your area over time.This model is provided with a USB 2.0 port that allows the user to connect the device to a PC.
Brightness of the sky on visual magnitude on arc seconds.
Infrared blocking filter; limits the visual band-pass measurement.
Temperature sensor, model and serial number are provided.
Precise readings even in very dark sky.
Firmware upgrade at http://unihedron.com/projects/darksky/cd/SQM-LU-DL/SQM-LU-DL_Users_manual.pdf
Sampling time of maximum light: 80 seconds.
Sampling time of minimum light: 1 secondo.
The specifications can be changed without advice
Instructions manual on PDF with CD and software
USB cable 4 mt
Battery pack for 6 battery AA
Calibration module: Serial number of the USB device and calibration data