Just received my new refractometer and all I can say is WOW. I can not believe my eyes so retested and calibrated it again and came up with same info. When using a swing arm deep 6 SG hand held the reading was 1.023. With the refractometer it reads 1.026 I wonder how I got along without this device for so long. I will never ever use those hand helds again. Thanks J man.