a filter; a strainer; a device used to remove impurities from liquids or gases. Can refer to household filters (e.g. coffee), laboratory equipment, or industrial filtration units.
水槽の濾過器を交換したら、水がきれいになった。
After replacing the aquarium filter, the water became clear.
実験では濾過器を使って溶液から固形物を取り除く。
In the experiment we use a filter to remove solids from the solution.
コーヒーを淹れるときはペーパーフィルターか濾過器を使う。
When making coffee, you use a paper filter or a filter device.