Several clients in the early 1980s wanted new ways to measure a range of things out in the 'real wild world'. Gradually, requirements emerged for a battery-powered, real-time, multi-channel data logger. A number of instruments on the market were evaluated and all of them lacked continuous measurement and analysis, i.e. to continue measurment while analysing and storing data. With DataTrap, sophistcated trigger conditions could be set by the user and continuous real-time measurement and analysis was made possible. Data was stored on removable memory cards. A DataTrap could operate up to two weeks on a battery charge.