These meters are photovoltaic devices for taking accurate and repeatable readings of UV light sources. Key Features: J-225 Meter measures the intensity of shortwave UV (254nm). Each meter comes with a sensor, attentuation screen and filter. This meter's sensor is sensitive within a range from 220 to 280nm with maximum sensitivity at 254nm J-221 Meter measures the intensity of longwave UV (365nm). It's sensor is sensitive from 300 to 400nm with a peak sensitivity at 365nm. J-221 Meter complies with MIL STD 45662-A and can be found in MIL-I-6868D (NSN 6635-488-5451) Each meter features two scales for low and high intensity readings For remote readings, a four foot (1.2m) cord connects the sensor to the meter Two scales measure a wide range of intensity An infrared filter assu...Read more
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