1pcs Uvi Meter 10% Ref. Nist High Precision Sun Index Tester Uvi

The instrumentation used to measure UV index for the program is directed toward the sky in a global normal (perpendicular to level ground) inclination.Therefore the UVI meter is designed to operate in the same fashion. Solar irradiance measured this way includes direct (reduced by cosine law depending on solar zenith angle) plus diffuse (diffused by the atmosphere).This vertical (global) reading represents an average intensity value your body will experience while being active on a tennis or volleyball court, or lying flat on a blanket on the grass. If however, you are reclined in a lounge chair facing the sun perpendicular to the sun angle, you will experience a higher UV intensity, as represented by pointing the UVI meter directly at the sun. This value will typically exceed the actual UV index number.Technical ParameterIndex Range:0-15.0 Spectral Response:280~400 nmResolution:0.1 IndexConv. Rat:3.0 Readings/SecDisplay:3.5 Digit LCDDigit Size:0.4 inch highOper. Temp:32 Fahrenheit TO 90 FahrenheitOper. Humid. :5% TO 80% RHAccuracy:10% REF.NISTColour:yellowMaterial:plasticPackage Contents:1 * Digital UVI MeterOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.