Optrode by Metrohm is a titration sensor with a photometric endpoint recognition that features a solvent-resistant glass shaft and a compact construction. This device is very easy to clean. One of the features of Optrode is that it carries eight wavelengths (470, 502, 520, 574, 590, 610, 640 and 660 nm) which can be changed to meet client demand. Optrode is backwards-compatible, able to work with new and old titration systems. The provided power supply is supported by the USB instrument of a compatible Metrohm product (USB sample charger, Titrando, Ti-TOuch, Titrino Plus). An optional USB power supply unit can be used for older titration systems.