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 assures accurate readings when measuring light sources producing infrared radiation
• The 5X attenuation screen can be used for very high intensity lamp measurements
• Meters are self-powered for maximum portability
  
  Dimensions:
  3H x 3D x 3W in. (76 76 76mm)  Weight: 9 oz (0.25kg)