By data acquisition we mean: sampling and measuring the output signals of one or more sensors for the purpose of storage and analysis. There are three ways of doing this. You can achieve this using data loggers that can operate independently of a PC. Or you can opt for precision multimeter systems with a multiplexer that connects the signals sequentially with the meter. Finally, you can also choose advanced systems for quick data acquisition and online analysis and direct connection to a computer. Where necessary, robust versions are available for various applications.