Weighted sensor settles face up in water every time!
Quickly and accurately measure light levels at the bottom of your tank using the waterproof sensors. Ranges: 0–1,999 lux, 2,000–19,999 lux and 20,000–50,000 lux. Easy-to-use meter has three buttons for manual range selection; accuracy is 6% of reading 1 digit. Sensor is salt water compatible and measures a peak wavelength of 560 nm. Meter is splashproof with auto shut-off.
3 1/2-ft cord connects sensor to meter. One 9V battery (included) gives 150 hours of use. Two-year warranty.