Can it be replace with other endnumber Units?
68 is just the production date. The first number is the year, the second number the month. So it is a sensor definitely from August, but the year could be 2016, 2006 or 1996… It can be replaced by a sensor with another number. What has to be the same is “81 210”.
Regarding the cap, I am not sure. For using this sensor the cap is not needed, so I guess it is application related.
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