Unveiling TESTO 552i Vacuum Gauge Failures and Shortcomings - What You Need to Know
In this video, I will show you how TESTO’s 552i vacuum gauge behaves in a refrigeration system. The vacuum sensor in this gauge is of the Pirani type, and Testo claims that it provides very accurate vacuum pressure readings.
However, this gauge has three major problems. I contacted TESTO and present...
