The PCE-TUM 20 is a portable handheld turbidity meter or turbidimeter for water quality analysis. This turbidity measuring device is equipped with a large LCD screen and user-friendly keyboard. The turbidity meter features two automatically switching measuring ranges between 0 … 50 NTU and 50 … 1000 NTU for increased accuracy. - 0 … 1000 NTU turbidity measuring range - Infrared LED light source - Calibration references included