Tech-supplies list these devices:
http://194.201.138.187/epages/Store.storefront/?ObjectPath=/Shops/Store.TechSupplies&ViewAction=DetailSearchProducts
I've just “found” these on the Rapid site
http://www.rapidonline.com/Electronic-Components/Integrated-Circuits/Ibutton
Expensive but tiny.
Re-usable for up to one million readings or ten years.
They look as though they could be very useful for many “serious” applications.
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http://194.201.138.187/epages/Store.storefront/?ObjectPath=/Shops/Store.TechSupplies&ViewAction=DetailSearchProducts
I've just “found” these on the Rapid site
http://www.rapidonline.com/Electronic-Components/Integrated-Circuits/Ibutton
Expensive but tiny.
Re-usable for up to one million readings or ten years.
They look as though they could be very useful for many “serious” applications.
e