The MEA-Systems record, amplify, and analyze signals from biological samples in vitro or ex vivo. The data is analyzed by the included data acquisition software. MEA-Systems are used to record from brain or cardiac slices, neuronal or cardiac cultures, beta cell screening, ex vivo retina, cell lines, or stem cells. Advantages of Multi Channel MEA systems are long-term and repeated recordings, fast results, unmatched sampling rate of up to 50 kHz per channel, and high-quality, low-impedance microelectrode arrays. Available options include 32 to 252 electrodes, as well as CMOS-Chips with 4225 electrodes, multiwell plates with up to 96-wells, and automated liquid handling for increased accuracy.