Apera Ph Pen Testers "New GS" Series Line?

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Not sure this would solve your problem. Per their product description, "A ventilation ducting tool designed for insertion into 6” ducting to prevent...

[dmpmfd]

That sucks but it seems like they have since upgraded their packaging.

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Here is a summary of the article (hoping this isn't against...

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I've started searching for a replacement to my Apera PH20 pen (possibly coming to EOL of sensor) and wanting to get one that the sensor can be replaced...