Equipment

We use the uncountable noun equipment to mean ‘the set of things that you need for a particular purpose’, such as tools or clothing:

• We’ve bought camping equipment, including new sleeping bags and a little refrigerator.
• All of Vincent’s camera equipment was stolen from his car.

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Because equipment is uncountable, we cannot say ‘an equipment’ or ‘equipments’. To refer to a single item of equipment, we say a piece of equipment:

• On board is a piece of equipment – a radiometer called the ATSR – which can measure the temperature of the seas.