Can i put a grill / mesh inside an obsersation chamber?

[MDDIY2022]

Hi - I'm looking to install an observation chamber which will have 160mm pipe running in and out of it. I want to catch any debris in the observation chamber before it exits ... probably a small grate with 10mm squares catch everything I need. Would would be the best way to do this? should I try to fix a grate on the inside of the exit hole of the chamber?

Thanks for any advice.