I am a scuba diver and, hence, need to take into account how buoyant the materials are I take with me into the water. Given that I have a LOT of diving equipment, it is practically impossible to test the buoyancy of all of my materials while diving.
Therefore, I am interested in figuring out the buoyancy (in grams) of each of these items (different lights, several sets of undergarments, et cetera) separately, in the comfort of my home.
What I am looking for is some kind of experimental setup that allows me to measure the buoyancy of each item (accurate to, say, 100 grams or so) at home, using items I have available at home (so without the luxury of access to a science lab).
I have contemplated filling a bucket with water and then inserting each item (possible made more heavy by adding weights on top, is the item is fully positively buoyant) and measuring the weight of the water that flows of the bucket, but I don't know how to do this practically (for example, how do I actually weigh that water correctly, and how do I remove the bucket that contains the item without spilling more water, et cetera). So, I am hoping there may be a more practical way of measuring buoyancy of each item, only relying on material that I have in my home.
Does anyone have some ideas how to make this practically feasible?