The atline system presented here enables water to be determined quickly and easily. Its robust design makes it insensitive to harsh production environments. Thanks to its modular structure it can be adapted to any particular process, and water contents between 0.02 and 50% can be determined in numerous intermediate and end products. All the analytical results are available for monitoring and control purposes and can be exported either via Ethernet or analog outputs on the I/O controller or processed further in a process control system.