The main reasons why an Optical DO sensor is a better choice for measuring dissolved oxygen
Stability, sensitivity, speed of response, accuracy in low DO conditions and minimal maintenance requirements.
Oxygen is not consumed as part of an electrochemical reaction and optical sensors do not require sample flow or stirring for accurate readings.
Results demonstrated excellent correlation between the optical sensor and the Winkler titration method.
Optical sensors respond faster than membrane-based sensors to changing temperature and DO
Readings are stable and drift is minimal over long-term deployments.
Durable sensing element offers a longer operational life than an oxygen-permeable membrane.
Maintenance and calibration requirements are drastically reduced, minimizing site visits and operational costs.
Material costs are reduced. Clark-cell sensors require frequent replacement of membranes and filling solution. The optical sensor Cap is replaced annually.