HI 97500 is a portable lux meter (light meter) designed to perform light measurements with ease. The instrument is provided with a light sensor connected to the meter through a coaxial cable, allowing measurements from a distance without any interference from the operator.By simply pressing the RANGE key, it is possible to switch among three ranges and choose the best resolution according to the environment to be tested. The HI 97500 lux meter has a rugged and water-resistant body for outdoor use without any problems. The 9V battery and automatic shut-off feature guarantee about 200 hours of operation. Hanna #: HI 97500. 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 Sensor: Human-eye-response silicon photodiode with 1.5 m coaxial cable (fixed).Battery Type / Life: 1 x 9V / approx. 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.) HI 97500 is supplied with battery, protective case and instructions.