What is the range of a pH scale?

What is the range of ph scale

pK_(w)=12.26 at 100^(@)C . What is the range of pH-scale at this temperature? What will be the pH of a neutral solution at this temperature ?

What is the range of time scale?

What is the range of nano scale.

What is the range of time scale?

What is the range of pH values ?

What is the range of a clinical thermometer on Fahrenheit scale ?