Filter: Metal Oxide Eeff (erythemally effective) and PTFE diffuser cap.
Sensor (for outdoor sun only) Note: All meters are now shipped with above SiC sensor unless confirmed by email for outdoor use only.
Aluminum Galium Nitride (AlGaN) Photodiode with UG-11 filter and PTFE diffuser cap.
Peak sunlight response bandwidth: 290-298 nm
Total solar response: 290-400nm, Diffey
Display: 3 ½ digit LCD
Resolution: 0.1 UVI
Power Source: 9V DC battery
Accuracy: ±10% ref NIST
Proper usage of Solarmeter Ultraviolet Radiometer for Outdoor UV Index Measurement
The instrumentation used to measure UV index for the U.S. E.P.A./NWS program is directed toward the sky in a global normal (perpendicular to level ground) inclination. Therefore the Solarmeter® Model 6.5 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 Solarmeter ® directly at the sun. This value will typically exceed the actual UV index number.
|To obtain the UV index instantaneous value, the following instructions will provide the most consistent, accurate results:|