AD 6000 Ultra Microbalance If you?re weighing samples from a few micrograms to a gram, the PerkinElmer® AD 6000 Autobalance can make a big difference in your laboratory. Using proven PerkinElmer balance technology, the AD 6000 Autobalance offers a wide range of features, including high performance, fully automated operation, and user convenience. With the AD 6000, you get the benefit of over 40 years of PerkinElmer experience in accurate weighing technology.