Greetings everyone. Today’s post will have us taking a look at an excellent digital solution for working on refrigeration systems – the UEi AK900SC/AK900HC Refrigeration System Analyzer Digital Manifold. First off, for clarity’s sake, the “SC” and “HC” in each part number refer to “soft case” and “hard case” respectively. So if you are looking to save so cash you can opt for the soft cover and if you need the extra protection for the unit you can pick up the hard case unit.