HI 97500 - Portable Lux Meter 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.