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<title><![CDATA[EC21 Product Catalogs - 457nm]]></title>
<link><![CDATA[https://www.ec21.com/ec-market/457nm--2717/1/457nm.html]]></link><item>
<title><![CDATA[Brightness Meter]]></title><link><![CDATA[https://pnshar.en.ec21.com/Brightness_Meter--6797758_6797789.html]]></link><description><![CDATA[457 whiteness optical system is 457nm and its half-width is 44nm. 4. Measure and display the whiteness, Fluorescent whiteness (whitening rate) and opacity (%) etc. digitally. 5. Indication error: 0.5]]></description><pubDate><![CDATA[20120615]]></pubDate></item>

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