Tenmars TM-204 Integrated Digital Light Meter Lux Photometer  Product Description:  - 3 digits LCD with maximum reading 2000. - Overload indication. - Low battery indication. - According to JISC1609:1993 and CNS 5119 general A class specifications. - Spectral response close to CIE luminous spectral efficiency. - Measuring intensities of illumination in unit of Lux or Foot-candle. - Measuring lights source include all visible range. - Cosine angular corrected.  Application:  - Warehouses, factories, office buildings, restaurants, schools, library, hospitals, photographic,video, parking garages, museums, art galleries, stadiums, building security.  --The batteries not included package  Specification:           Model     TM-203     TM-204     TM-205           Data hold     V     V     V           Max/ Min /AVG hold     V                     Max hold          V                Zero adjustment     V     V     V           Auto ranging     V          V           Auto power off     V          V           Datalogger     V                                  Sensor     Silicon photodiode and filter           Measuring range     200, 2000, 20000, 200000 Lux 20,200, 2000, 20000 Foot-candle           Accuracy     +/- 3% (Calibrated to standard incandescent lamp 2856º K) +/- 8% (other visible light source TM-204) +/- 6%(other visible light source TM-203/205)           Angle deviation from cosine characteristics     30º     +/- 2%           60º     +/- 6%           80º     +/-25%         Dimension:           Meter size (LxWxH)     172x55x38mm           Weight (including battery)     250g