Solarmeter Model 4.0 Standard UVA Meter - Measures 320-400nm with range from 0-199.9 mW/cm² UVA

The Model 4.0 UVA Meter's sensor consists of a GaAsP photodiode and a UV filter. It is completely insensitive to visible light longer than 400nm and infrared radiation because its spectral response only covers the UVA region from 320-400nm. Applications include monitoring UV lamp intensity and aging, measuring outdoor UVA, testing acrylic shield transmission, testing window film/transmission, and testing eyewear UVA blocking capabilities. To operate your Solarmeter, aim the sensor window located on the top panel of the meter directly at a UV source. Press and hold the push-button switch on the face of the meter. For best results take note of the distance the reading was taken from the UV source in order to ensure repeatable results. Battery operation voltage is viable from 9V down to 6.5V. Below 6.5V the numbers on the LCD display will begin to dim indicating the need for battery replacement. Under typical service load a standard 9V battery will last approximately 2 years.