Features: Accurately displays light level in terms of Fc or Lux over three ranges: Fc (0-200, 0-2000 and 0-5000Fc) Lux (0-2000, 0-20000, 0-50000Lux) Resolution of 0.1Fc or 1Lux with 5% accuracy Select fast (0.2 second) or slow (0.4 seconds) response Monitor light levels using outputs; 1mV per count analog output for capturing readings to a recorder Utilizes precision photo diode and color correction filter; Cosine/color corrected Complete with 9V battery and light sensor with 45" (1.1m) cable and protective cover Specifications: Fc Range: 200, 2000, 5000Fc Lux Range: 2000, 20000, 50000Lux Max. Resolution: 0.1Fc/1Lux Basic Accuracy: ±5% FS Fast Response: 0.2s Slow Response: 0.4s Cosine & Color Corrected: Yes Analog output: Yes Dimensions/ Weight: 6.4x2.8x1.2" (163x70x30mm)/ 8.3oz (220g) 401025 is a Foot Candle/Lux Meter which measures light level to 5000FC (foot-candles) and 50,000 Lux with a 5% accuracy using a precision photo diode and color correction filter. Meter features fast/slow response time and an analog output (1mV per count) for capturing readings to a recorder. Comes complete with 9-Volt battery.