HI 97500 is a portable lux/light meter designed to perform light measurements with ease. The instrument is provided with a light sensor connected to the meter HI 97500 Portable Lux Meter Three measurement ranges Light sensor attached to 1.5 meter coaxial cable Rugged, waterproof case Low-battery indicator HI 97500 is a portable lux meter designed to perform light measurements simply and accurately. The instrument is supplied with a light sensor connected by a fixed 1.5 m coaxial cable to allow measurements to be taken from a distance without any interference from the operator. By simply pressing the RANGE key, users can switch among three ranges to choose the best resolution according to the environment being tested. The HI 97500 lux meter has a rugged and water-resistant body for frequent outdoor use. HI 97500 features a low battery indicator and automatic shut-off feature that turns the meter of after 7 minutes of non-use. Powered by a single 9V battery, this instrument guarantees about 200 hours of continuous operation. Specifications: Range 0.001 to 1.999 Klux; 0.01 to 19.99 Klux; 0.1 to 199.9 Klux Resolution 0.001 Klux; 0.01 Klux; 0.1 Klux Accuracy ±6% of reading ±2 digits Sensors human-eye-response silicon photodiode with 1.5 m coaxial cable (fixed) Battery Type / Life 9V / approximately 200 hours of continuous use; auto-off after 7 minutes of non-use Environment 0 to 50°C (32 to 122°F); RH max 100% Dimensions 164 x 76 x 45 mm (6.5 x 3.0 x 1.8") Weight 180 g (6.3 oz.) HI97500 Light meter Lux meter à¤Ã×èͧÇÑ´¤ÇÒÁà¢éÁáʧ à¤Ã×èͧÇÑ´áʧ