Portable lux meter features maximum 200,000LUX wide range, 0.1LUX/ 0.01FC high resolution, unit selection, automatic measuring range selection, and data hold function. Adopts a silicon photo diode with filter, with CIE photopic (CIE human eye response curve) spectral response, mainly used in industrial/ laboratory/ planting and other places as professional light intensity instrument. Digital LCD screen clearly displays illumination value and unit, greatly enhancing reading experience. Note: 20,000LUX range, reading x10; 100,000/ 200,000LUX range, reading x 100. It supports automatic data recording function, including maximum and minimum values; supports unit selection of LUX/ FC, satisfying different requirements. Compact and lightweight, non-slip and comfortable to hold, easy to use. Powered by 2 AAA batteries (not included), easy to install and replace batteries.