Traceable Dual-Range Light Meter with Recorder Output and Calibration

This dual-unit visible light meter measures from 0 to 50,000 lux or 0 to 5,000 foot-candles. The photovoltaic cell and microprocessor provide an impressive 0.4 second sampling rate and automatic-zero adjustment. Color-correction filter and precise photodiode produce accurate cosine- and color-corrected measurements over the wide range.