This is the official statement from me (GHL):
- The floater or optical sensor don't expire when lying on the shelf! Correct storage assumed.
- pH- or redox electrodes do have an expiry date (no suprise I guess)
and no, there is not a common issue with the opto-levels
Was this clear enough?
I hope all the confusion has been cleared up now.
This is my last comment to this topic here, all further discussions will be between spshelps and us directly.
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