Lutron LX105 LX-105, Light Meter, 2000/20,000/50,000 Lux, RS232 Output Overview: - Cosine and colour corrected measurements - Super large LCD display with contrast adjustment for best viewing angle - Dual function meter's display - Displays % differential from reference point - Zero adjustment by push button - Sensor used the exclusive photo diode & colour correction filter, spectrum meet C.I.E. photopic - Accuracy is enhanced by selecting lighting type (Tungsten/Daylight, Fluorescent, Sodium, Mercury) - Record/Recall Min, MAX and AVG readings - Relative % light measurement - Data Hold plus Auto shut-off - Built-in RS-232 serial interface - Optional Windows 95/98 compatible software and serial cable - Optional battery powered datalogger stores over 8000 readings Simultaneous display of Foot-candles or Lux, plus four lighting types (Tungsten/Daylight, Fluorescent, Sodium, Mercury) Specifications Range: 2,000/20,000/50,000 Lux Resolution: 1, 10, 100 lux; 0.1, 1, 10 Fc Accuracy: 4% of reading Sampling Rate: 0.4 second Power Supply: Single 9V battery Dimensions/Weight: 180 x 72 x 33mm/335g The batteries not included package