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For example, the illuminance could be integrated over time to yield luxhours lxh or foot candlehours fch. Buy extech ea31 easyview 31 digital light meter and more from our comprehensive selection of extech easyview light meter. Extech ea31 light measurement up to 20,000fc20,000lux. Extech ea33 easyview big digit light meter with memory this compact and ruggedly designed meter has a wide measurement range to 99,990 foot candles in five ranges and 999,990 lux in five ranges with 0. Ea33 easyview light meter with memory ea33 nist ea33 with nist certificate features.
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Extech highest intensity light measurements up to 99,990fc999,900lux. Looking for extech easyview light meter, up to 20k fc 8evp0. Congratulations on your purchase of the extech ea33 easyview light meter which. Extech ea33 easyview light meter with memory mitchell.
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The handheld extech ea33 light meter, weighing only 11. Protocols for visually guided navigation assessment of efficacy of. This compact and ruggedly designed meter has a wide measurement range to 99,990 foot candles in 5 ranges and 999,990 lux in 5 ranges with 0. The extech easyview widerange light meter measures up to 40,000 footcandles in four ranges and 400,000 lux in five ranges with 3 percent accuracy ideal for outdoor use. Feb 06, 20 in order to determine the actual contrast ratios during the experiment, we measured luminance for black minimal luminance and white maximal luminance displays for each of the three media from the position of the participant i. Large 312 digit 1999 count lcd with overrange indication. Extech ea31 easyview 31 digital light meter from davis. Name 4 abachi 4 mahogany 5 abura 5 maple, bigleaf 6 afrormosia 5 maple, red 5 agba 6 maple, sugar 4 alder 6 meranti 5 ash 6 oak red 4 aspen 7 oak, white 4 basswood 7 pecan 6 beech 4 pine eastern white 6 birch 4 ponderosa 4 cedar, eastern 5 red. The target was a matte grey circle with approximately 50% diffuse reflectivity, which was verified with an extech ea33 light meter.
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