Hach has released the newest model of its LDO Probe, designed to measure dissolved oxygen (DO) in wastewater applications without the need to replace membranes or replenish electrolyte solution.
The Hach LDO probe uses a luminescent sensor to measure the concentration of dissolved oxygen in a solution. Molecules within the senor are excited by a blue LED and the oxygen in a sample causes them to relax. The higher the concentration of O2 in a sample, the faster the luminescent molecules will return to their normal state.
The sensor also takes into account the temperature of a sample, which has affects accurate DO measurement. Each sensor cap is calibrated in the factory prior to shipping, so it can determine the relationship of life span, temperature and O2 concentration resulting in a complete picture of what is happening in the facility.