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Senior Member
Hi everybody,

I tend to get confused when I have to use one of this three terms for a certain kind of apparatus. For instance, is a blood pressure monitor an instrument, an appliance, or a tool?
Thank you
  • alvarezg

    Senior Member
    An instrument is a precision, maybe scientific, device, such as a blood pressure monitor. It can also refer to a musical instrument, maybe because both are considered delicate.
    A tool is something tradespeople use, such as a hammer. or screwdriver.
    An appliance is usually operated by electricity and used at home: washing machine, vacuum cleaner,blender, etc. In the medical field, artificial arms or legs, or braces to make your teeth straight are also called applieances.


    New Member
    'Instrument' can also be used to define a weapon. For example..'He was attacked with a blunt instrument' = a weapon that is not a hammer or baseball bat or something.

    'He was attacked with a sharp instrument' = a weapon that is sharp or bladed like a knife, sword, broken bottle.

    I would just call a blood pressure monitor 'medical apparatus'.
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