Is that gold cylinder a moisture filter? If so, is it filled with absorbant beads or is it a molecular sieve type? Might be tricky to determine how efficient moisture removal is. I have a lab grade thermohygrometer (remote probe) which can measure relative humidity. If you inflate a plastic bag with output air, seal it tight, I can see what it’s reading on the meter. No charge, of course; someone would just have to mail it to me. I like the 120-12v feature!