The Ethernet Enabled Sky Quality Meter w/ Lens, Weatherproof Housing and POE by Unihedron:  At long last, Unihedron is offering an economical SQM model that is Ethernet-enabled for steady sky brightness monitoring in twilight! Calculates night sky brightness in magnitudes per square arcsecond. The Unihedron SQM-LE, designed by Dr. Doug Welch and Anthony Tekatch, provides an accurate measurement of just how high the quality of the night sky or site actually is. Analyze the brightness of the sky at various locations and chronicle the severity of light pollution in your area. Set planetarium dome illumination to simulate sky conditions people are likely to encounter in other areas of their city. The SQM-LE allows the user to keep an eye on sky brightness levels throughout the night, week, month, or even year and figure out which dates are most likely to show the greatest possibility for being able to locate the faintest stars. Fine-tune the consequence of sky brightness using qualitative measures such as the Bortle Scale and research how sky brightness corresponds to solar activity. Share your knowledge of sky brightness levels to help predict forthcoming illumination grades with the Clear Sky Clock. Lastly, the SQM-LE allows users to correlate a difference in the reading on the SQM to predict a difference in the background ADU with a particular filter and exposure.

Unihedron Ethernet Enabled Sky Quality Meter w/ Lens, Weatherproof Housing & POE Features...

 

• Quality of sky illumination expressed in visual magnitudes per square arcsecond
• Infrared blocking filter limits analysis to visual bandpass
• Includes sensor temperature, model number, and serial number
• Get precision readings from even the blackest of nights
• Firmware that is field-upgradeable
• Open protocol document

Unihedron Ethernet Enabled Sky Quality Meter w/ Lens, Weatherproof Housing & POE Specifications... 

• Ethernet connectivity
• Includes applications for reading data in Java, C, Perl, Python
• The Half Width Half Maximum (HWHM) of the angular sensitivity is ~10-degrees. The Full Width Half Maximum (FWHM) is then ~20-degrees. The sensitivity to a point source ~19-degrees off-axis is a factor of 10 lower than on-axis. A point source ~20 degrees and ~40-degrees off-axis would be listed at 3.0 and 5.0 magnitudes fainter, respectively.
• Operates from included 5-6VDC adapter
• Minimum light sampling time: 1 second; Maximum light sampling time: 80 seconds
• Dimensions: 3.6 x 2.6 x 1.1-inches

OPT Product Number: UH-SQM-LE-HPOE