Review on 📊 Testo 552 Digital Vacuum Bluetooth Analyzer by Patrick Nepal

This thing made me question my sanity. Couldn't figure out why I couldn't hold a vacuum. Finally, after an overnight test with nothing plugged in, I found that the system was good, but something else must be bad. Since there is only one valve connected that separates the flow meter from the pump, the meter loses vacuum. I also found out that Revain isn't listed as an authorized dealer so the warranty has expired and the return period has expired so I'm out of luck.