The new TL23 Series laboratory turbidimeters blend trusted technology and improved features to simplify testing in the most demanding industrial and wastewater applications. Hach’s new TL23 lab turbidimeter brings a new face to the trusted legacy 2100N and 2100AN turbidimeters. It utilizes the same optic bloc while delivering an improved user experience with its intuitive interface, which ties perfectly to the rest of Hach’s laboratory instruments. The 2100N is replaced by TL2300 (EPA 180.1 compliant, up to 4,000NTU) which still utilizes Tungsten filament lamp for your measuring needs.