I am curious what part do they substitute for a mercury float?

[triumph1234]

I have a project using gravity to form the circuit and instead of a metal piece I was curious if there was a substitute for the old mercury switches in thermostats? I have searched but to no avail.
Thanks

 

[ChosunOne]

See Wikipedia, Galinstan.
https://en.wikipedia.org/wiki/Galinstan

 

[Bluejets]

Tilt switch...... there are module units for use with Arduino also (Ebay eyc)

https://core-electronics.com.au/til...MI5Ja8hqTU7gIVEjdgCh13FwBeEAQYAyABEgJbL_D_BwE

 

[triumph1234]

Thanks very much!