Is there a pressure sensor?Updated a year ago

No. Instead we have two gentle (but powerful) brushing modes and medium/soft bristles which provide an effective clean without being harsh on gums or tooth enamel. 

Worried you're brushing too hard? Give these a try:

1) Don't brush—'massage'
There's no need to brush or scrub your teeth, simply guide your toothbrush around your teeth in small circles and let our sonic motor do the work for you.

2) Try a lighter grip
Simply hold the handle between your thumb and first two fingers. It’s almost impossible to brush too hard.