I doubt about the correct preposition here.

Which sentence should I use if it is the engineers themselves who are clamouring for the equipment?

This instrument is highly demanded for engineers

This instrument is highly demanded by engineers

or are both correct?

and how about this?

It is highly demanded instrument for engineers

It is highly demanded instrument by engineers

  • Are the engineers doing the demanding? Or someone else? Preposition questions must state the intended meaning as it's the meaning which determines the correct preposition to obtain that sense.
    – Andrew Leach
    Commented Apr 10, 2015 at 21:51
  • 2
    If you mean engineers are demanding it, then by. If you mean it's being demanded on behalf of engineers (by other people), then for. For a more detailed explanation, please ask on our sister site for those baffled by the mischievous imps of the English language, prepositions: English Language Learners.
    – Dan Bron
    Commented Apr 10, 2015 at 21:53
  • @AndrewLeach yes I mean engineers demand it. thanks
    – ihood
    Commented Apr 10, 2015 at 22:01
  • @AndrewLeach, could you help me with the second added part too?
    – ihood
    Commented Apr 10, 2015 at 22:06
  • 1
    If the meaning is the same, then the preposition is the same. However: there is a question about articles which is relevant.
    – Andrew Leach
    Commented Apr 11, 2015 at 7:20

3 Answers 3


For the situation when the engineers themselves demand the instrument, you definitely use

This instrument is highly demanded by engineers.

You can come up with the preposition (by or for) by attributing the action of demanding:

  • engineers demand = demanded by engineers
  • someone else demands = demanded for engineers (by someone else).

In the second case there is a third party as the source of the action.

As to your second question, the concept is the same plus in case of 'for', the meaning is dual:

  1. demanded for the engineers' work process
  2. demanded for engineers by someone else

Remember to use 'a' article with 'is'

It is a highly demanded instrument ...


Considers these examples:

This instrument is highly demanded for engineers by management.

for engineers: for the benefit of engineers, the management is placing /orders/requests/ for it, or buys it, so the engineers could use its superior functionality, etc.

This instrument is highly demanded by engineers, who are asking for it every day.

by engineers: the engineers themselves are asking for it


demanded by = someone else ask for that thing Example:Salary hike is demanded by the employee Here the salary is asked by the employee

demanded for = Something is asked for the other person Example:The Team Leader demanded for the salary hike of team members.

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