Sintered metal filters are often too coarse to catch small particles. Pleated paper filters are a sure bet, but carry a spare, because if there's enough fine silty dirt, they can get clogged. There are some high quality sintered metal filters with micron ratings, but I can't give you a specific brand from memory.
I had a chunk of dirt get through a sintered metal filter on my DT100, and it was so big it stuck in the main jet.
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