scale or scales?

[frindle]

[FONT=&#54620]Hello. [/FONT]
[FONT=&#54620]I'm wondering which sentence is correct.[/FONT]
[FONT=&#54620][FONT=&#54620](When "scale" means 'a small weighing machine', should it be always plural?)[/FONT]
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[FONT=&#54620][/FONT]
[FONT=&#54620]1. [/FONT][FONT=&#54620]A scale is a tool that doctors use to measure your weight.[/FONT]
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[FONT=&#54620]2. Scales are tools that doctors use to measure your weight.[/FONT]
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[Tdol]

I would use a scale for a system to measure smething and scales for the machine.

 

[Barb_D]

Please see this: https://www.usingenglish.com/forum/ask-teacher/119559-scale-scales.html