Why do dissolved oxygen membrane sensors have to be polarized for 12 hours before calibration?

Document ID

Document ID TE431

Published Date

Published Date 27/05/2017
Question
Why do dissolved oxygen membrane sensors have to be polarized for 12 hours before calibration?
Summary
Dissolved oxygen membrane sensor have to be polarized for 12 hours before calibration
Answer
Membrane sensors need to be polarized prior to calibration to ensure that the electrode signal is stable. If the sensor is not polarized, the measured concentration will not be accurate and the reading will drift.