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Sky Quality Meter

Sky Quality Meter

Regular price $349.00
Regular price Sale price $349.00
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An easy to use meter for measuring the brightness of the night sky

The Sky Quality Meter - L measures the brightness of the night sky in magnitudes per square arcsecond. Perfect for checking how dark you night sky is and for dark sky reserve projects.

Unprecedented sensitivity in a handheld meter.


  • Find out how good the night or site REALLY is.
  • Compare the sky brightness at different sites.
  • Monitor sky brightness through the night, night-to-night, and year-to-year.
  • Set planetarium dome illumination to mimic the skies people are likely to experience elsewhere in the city.
  • Determine which nights show the greatest promise for finding the 'faintest fuzzies'.
  • Calibrate the effect of sky brightness on qualitative measures such as the Bortle Scale.
  • Investigate how sky brightness correlates with the solar cycle and month-to-month sunspot activity.
  • Help provide local ground truth for future sky brightness prediction with the Clear Sky Clock.
  • CCD users can make a correlation between the SQM reading and when the background reaches some ADC level.

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