English to Italian Tech/Engineering Patents sensori di gas

The electrodes are of platinum. While electrodes of most other materials, such as tungsten or aluminum, tend to cause drift when being used in a gas sensor of this type, it is found that platinum electrodes are highly stable (chemically inert) and therefore reduce the device’s tendency to drift. At the same time, platinum electrodes are well able to withstand the high temperatures on the hotplate.

Quale traduzione per drift in questo contesto?
"deriva"/"slittamento"/"deviazione"/"spostamento"?

Grazie