Review on BACOENG 220lbs Digital Electronic Refrigerant Charging Weight Scale for HVAC AUTO AC Freon Recovery with Auto Shut-Off, Back Light, 9V Battery, Portable Case by Chad Dahl

This scale is good value and works well but has one major design flaw. After a while it turns off and does not remember the weight. When this happened to me I was lucky enough to remember the weight of the balloon when I started. I then did a calculation to determine my final weight and wrote it on the tank. I fully charged the 3 ton system so this thing went off a couple of times. If I hadn't been paying close attention early in the attack, I really would have been in a stalemate.