{"product_id":"unihedron-sky-quality-meter-sqm-lu","title":"Unihedron Sky Quality Meter (SQM-Classic)","description":"\u003ch2\u003eUnihedron Sky Quality Meter\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eAn affordable meter for measuring sky brightness for astronomers!\u003c\/p\u003e\n\u003cp\u003eThe \"Sky Quality Meter\" measures the brightness of the night sky in magnitudes per square arcsecond.\u003c\/p\u003e\n\u003cp\u003eUnprecedented sensitivity in a handheld meter!\u003c\/p\u003e\n\u003cp\u003eDesigned by Dr. Doug Welch and Anthony Tekatch\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003eUses:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFind out how good the night or site REALLY is.\u003c\/li\u003e\n\u003cli\u003eCompare the sky brightness at different sites quantitatively.\u003c\/li\u003e\n\u003cli\u003eDocument the evolution of light pollution in your area.\u003c\/li\u003e\n\u003cli\u003eSet planetarium dome illumination to mimic the skies people are likely to experience elsewhere in the city.\u003c\/li\u003e\n\u003cli\u003eMonitor sky brightness through the night, night-to-night, and year-to-year.\u003c\/li\u003e\n\u003cli\u003eDetermine which nights show the greatest promise for finding the 'faintest fuzzies'!\u003c\/li\u003e\n\u003cli\u003eCalibrate the effect of sky brightness on qualitative measures such as the Bortle Scale.\u003c\/li\u003e\n\u003cli\u003eInvestigate how sky brightness correlates with the solar cycle and month-to-month sunspot activity.\u003c\/li\u003e\n\u003cli\u003eHelp provide local ground truth for future sky brightness prediction with the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/cleardarksky.com\/csk\/\" data-mce-href=\"http:\/\/cleardarksky.com\/csk\/\"\u003eClear Sky Clock\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca title=\"Charge-Coupled Device (type of image sensor)\"\u003e\u003cstrong\u003eCCD\u003c\/strong\u003e\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eusers can make a correlation between the SQM reading and when the background reaches some\u003cspan\u003e \u003c\/span\u003e\u003ca title=\"Analog-to-Digital Converter\"\u003e\u003cstrong\u003eADC\u003c\/strong\u003e\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003elevel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFeatures:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAudible signal while measurement is in progress.\u003c\/li\u003e\n\u003cli\u003eSky brightness displayed in visual magnitudes per square arcsecond.\u003c\/li\u003e\n\u003cli\u003eInfrared blocking filter restricts measurement to visual bandpass.\u003c\/li\u003e\n\u003cli\u003eTemperature in both Celsius and Fahrenheit as well as model number and serial number can be displayed with different button press sequence.\u003c\/li\u003e\n\u003cli\u003ePrecision readings at even the darkest sites.\u003c\/li\u003e\n\u003cli\u003ePower-saving features designed in for maximum battery life.\u003c\/li\u003e\n\u003cli\u003eReverse battery protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe Half Width Half Maximum (HWHM) of the angular sensitivity is ~42°.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/unihedron.com\/projects\/darksky\/images\/fovcurves.jpg\" data-mce-href=\"http:\/\/unihedron.com\/projects\/darksky\/images\/fovcurves.jpg\"\u003eComparison chart\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eOperates from 9V battery (included with courier shipments).\u003c\/li\u003e\n\u003cli\u003eSize 3.8 x 2.4 x 1 in.\u003c\/li\u003e\n\u003cli\u003eMaximum light sampling time: 80 seconds.\u003c\/li\u003e\n\u003cli\u003eSpecifications are subject to change without notice.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUnihedron Sky Quality Meter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003eWarranty: Unihedron warranty\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Unihedron","offers":[{"title":"Default Title","offer_id":46096215212261,"sku":"UH-SQM-Classic","price":186.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/sqmback.jpg?v=1777043442","url":"https:\/\/istronomyplus.com\/products\/unihedron-sky-quality-meter-sqm-lu","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}