Digital RGM UVC Light Meter Spectrum 220-280NM UV Radiation Reptile Measurement High Precision UV Lighting Measuring      Features: The instrument has an LCD that can display the value of UVC irradiance. When the lamp's output drops to 70% of original readings, please replace it.   Simply press and hold the push-button switch on the face of the unit. Aim the sensor window in the top panel of the meter directly at the UV source. Note reading on LCD and record if desired. To get more accurate data, please take several tests at the same distance and averaging.   Compact radiometer, Uses imported UV photosensitive devices, Comes with an integrated UVC filter, Has good cutoff characteristics.   Adopting high-precision digital AD, display accuracy is stable and accurate. Imported sensor, no stray light effect, Probe material, UV glass.   Widely used for daily UVCtesting of all types of reptile lamps, Effectively help you choose the best angle and distance of your own bulb.      Specification: Material: ABS   Size: 100x78x58mm/3.94x78x58mm   Response spectrum: λ = 220-280nm   Measurement range: 0~ 2000uW /cm2   Measurement accuracy: 1uW /cm2   Response time: T≦ 0.5s   Measurement error: ±10%   Power consumption: ≦0.25W   Power supply：2XAA battery( excluded)      Package Includes: 1x UVC Light Meter      note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid.   Due to the difference between different monitors, the picture may not reflect the actual color of the item.