Each sensor comes with one adhesive pad for installation. Notion starter kits will not ship with extra adhesives.
While we can't guarantee the adhesive's fidelity after being removed from it's initial location, it may be able to be reused. It's important though that if it is reused, the copper colored disc on the bottom of the device is still in flush contact with the new surface.
If you need an extra adhesive for your sensor we would be happy to send those to you free of charge. Please email us at firstname.lastname@example.org to make a request.