Wide Range Light Meter that provides high intensity light measurements up to 40,000Fc/400,000Lux. This product is NIST Certified which indicates that the product is traceable to standards provided by the National Institute of Standards and Technology (NIST). The Extech EA30-NIST Light meter sports a compact and rugged design and features a large display. Multiple wide measuring ranges: 40,000Fc in 4 ranges and 400,000Lux in 5. Data hold freezes reading on display MIN/MAX readings. Zero function Cosine and color corrected measurements. Low battery and overrange indication. Auto power off to save battery life. Meter utilizes precision silicon photodiode sensor with 3ft coiled cable for easy storage. With NIST Calibration.