Pressure gauge without pump
I will travel with the airplane and I want to take my pump with me. I want to avoid any embarrassing situation at the customs when they see the hand-pump with a gauge in my luggage.
I read that some members take the cylinder and the hose only with them and use their mouths to suck out the air from the cylinder. My problem with this is that I wouldn’t be able to monitor the pressure. If I go by feeling I would create a vacuum of at least 10” Hg, which is too much.
Did anyone here ever see a pressure gauge without the pump which would fit into the cylinder opening? This way I could suck out the air, then measure the pressure. And just having a stand alone pressure gauge in the luggage wouldn’t cause any suspicions with the customs.