UK perspective here.
A domestic device for weighing quantities of cooking ingredients, or a person's body mass, is usually called "a scales". Yes that's right, not "scale".
A device used for measuring small quantities with precision in a scientific (usually chemical) laboratory is called a "balance".
If any of these devices has an electronic display of the weight, it has the word "electronic" in front of it.
Hence you have "a scales" in the kitchen, whose technology may either be based on putting known weights in one pan and the unknown in the other (technically known as a "balance"), or on the compressibility / extensibility of a spring, and a pointer which indicates on a "scale" the value. Both are a "scales".
Then to confuse you even further, a simple device consisting of a spring which holds an item to be weighed underneath it, whose technology consists of stretching a spring rather than compressing it (commonly seen in schools, in the science lab) is referred to as a "spring balance".
Hope this helps.