Hey guys I need to get a psychrometer for the A/C season and im new to the A/C side of things so I never needed one. My boss has an uei brand and some of the other techs have yellow jacket. I looked around online a bit and they seem to be about 100 bucks or so. I found a cheaper pen style one from supco for a decent price. My question is what would be a good psychrometer for someone starting out?