The Lange LDO method is based on a completely new, optical principle. The measurement is carried out by way of an oxygen-sensitive coating that is excited by a blue light-emitting diode. After excitation the coating subsequently emits red light. The elapsed time between excitation and emission corresponds to the DO concentration. A further (red) LED is used to compensate for minor variations within the cell.
- No more calibrating: Minimal maintenance
- No more replacing of the membrane and electrolyte: Easy handling
- No flow rate required: Accurate and dependable measurements
- No more poisoning of the electrode by H 2 S: Usable for difficult applications
- No polarization times: High availability