{"product_id":"unihedron-sky-quality-meter-with-lens-sqm-l","title":"Unihedron Sky Quality Meter with Lens (SQM-L)","description":"\u003cmeta name=\"uuid\" content=\"uuidxrj1083g3cOY\"\u003e\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e\u003cstrong\u003eThe Sky Quality Meter-L\u003c\/strong\u003e measures how clear the night or site is. Compare the sky brightness at different sites with measured results! If you're a CCD use, you can make a correlation between the Unihedron SQM-L reading and when the background reaches some ADC level.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eHow to Use the Sky Quality Meter-L\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eKeep track of the evolution of light pollution in your area.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eSet planetarium dome illumination to mimic the skies you are likely to experience elsewhere in the city.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMonitor sky brightness through the night, night-to-night, and year-to-year.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDetermine which nights are the greatest for finding the faintest of lights.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eCalibrate the effect of sky brightness on qualitative measures such as the Bortle Scale.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eInvestigate how sky brightness correlates with the solar cycle and month-to-month sunspot activity.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eHelp provide local ground truth for future sky brightness prediction with the Clear Sky Clock.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFeatures of the Sky Quality Meter-L\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eReceive audible signals while measurement is in progress.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThe sky brightness measure is displayed in visual magnitudes per square arcsecond.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIts infrared blocking filter restricts measurement to its visual bandpass.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eTemperature is measured in both Celsius and Fahrenheit.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThe model number and serial number can be displayed with different button press sequences.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eReceive precision readings at even the darkest sites.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIts power-saving features provide maximum battery life.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eReverse battery protection.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eFull List of Specifications for the Sky Quality Meter-L\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe Half-Width Half Maximum (HWHM) of the angular sensitivity is ~10 degrees.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe Full-Width Half Maximum (FWHM) is then ~20 degrees.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe 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 register 3.0 and 5.0 magnitudes fainter, respectively.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eOperates from 9V battery (included).\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eSize: 3.6 x 2.6 x 1.1 inches\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eMaximum light sampling time: 80 seconds\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eSpecifications are subject to change without notice.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOPT Product Number: \u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eUH-SQM-L\u003c\/strong\u003e\u003c\/span\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eAn affordable meter for measuring sky brightness!\u003c\/li\u003e\n\u003cli\u003eUnprecedented sensitivity in a handheld meter!\u003c\/li\u003e\n\u003cli\u003eMeasures the brightness of the night sky in magnitudes per square arcsecond.\u003c\/li\u003e\n\u003cli\u003eDesigned by Dr. Doug Welch and Anthony Tekatch.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Unihedron","offers":[{"title":"Default Title","offer_id":52488911683879,"sku":"oop1793367961188","price":94.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/2481\/4887\/files\/unihedron-sky-quality-meter-with-lens-sqm-l_1.jpg?v=1793367968","url":"https:\/\/mobwifestyleboutique.shop\/products\/unihedron-sky-quality-meter-with-lens-sqm-l","provider":"My Store","version":"1.0","type":"link"}