The PAMAS S4031 GO is a portable particle counter that is integrated in the rugged case PAMAS GO specially developed and designed for harsh environments. It can be used for batch sampling or for online measurements. A wear resistant ceramic piston pump guarantees a constant flow. With a simple-to-use touch screen user interface operation is easy and intuitive. Up to 32 free adjustable size channels may be selected and stored in the system. The system is equipped with an integrated battery for more than three hours operation and data storage of more than 4000 measurements.