iU2-C is a precise meter that measures UVC radiation. This meter measures UVC light from artificial light sources. Applications of iU2-C include : Monitoring UVC (e.g. s t e r i l i z i n g) Lamp Intensity & Aging; Testing Eyewear UVC Blocking Capabilities; Measuring UVC Lamp Fixture Leakage. Widely used in Home, Office, School, Restaurants, Clinics, Hospitals and Industries etc..Specifications: UVC Measurement Range 0 to 3000 uW/cm2 Spectral Detection Range 220 to 280 nm; Peak point of Spectrum 254~265 nm. The peak absorption wavelength of most D N A is about 265 nm; Measurement accuracy +-4% or +-1 digits Resolution 1.0 uW/cm2 Power Supply Two AAA Alkaline Batteries; Dimensions 67x124x25 mm (2.64x4.88x0.98") Weight 123 grams (4.34 oz.) with batteries. MATERIALS SUPPLIED : UVC Light Meter; Protector Bag; English User Manual; Two AAA Alkaline Batteries. Please note that the actual wavelength of some UVC labeled LED lights exceeds 280nm. The test result with this product will be zero.