My dissolved oxygen electrode is dry, what should I do?

Rehydration of DO probes is quick and easy.

Remove the red and black plastic cap or the membrane assembly. Soak the bottom 1 inch in electrolyte solution for 5 minutes. Rinse the membrane with electrolyte and refill with clean electrolyte. Gently tap the sides of the membrane cap to ensure that no air bubbles remain trapped. Adjust O-ring inside membrane cap. With the sensor facing down screw the membrane assembly.