I have a pollen trap which I haven’t used for about 20 years. Anyway with this one, all you do is replace the bottom board with it, which would work with a flow hive. I got a fair bit of pollen with it. You also get a few legs & wings. You need to close it off during wet weather because the pollen gets damp & goes mildewy.
I used to think that while a colony was above a pollen trap, I wouldn’t have to worry about that colony swarming. How wrong was I, the colony still swarmed. Therefore enough pollen still got through the mesh for the colony to build up to swarming strength.
I don’t use them myself, but I think that @Gerald_Nickel has used them on a Flow Classic. I haven’t seen him on the forum for ages, and I know that both he and his wife were very sick, so he may not be able to answer in person. However, from what I remember, they worked pretty well for him.
If they are compatible with a standard Langstroth bottom board, I don’t see why they could not be used with a Flow hive.
Dawn, are you still on this site. Had some heart issues n lost my contacts n passwords. Hope all is well on your end. Just succeeded in my first flow harvest after 6 years trying … it was awesome to see the flow out those tubes.