The software PAMAS PCT is used in test rigs to monitor the cleanliness of components. These include for instance hydraulic systems whose hoses are flushed with a cleaning fluid. The software PAMAS PCT is used in combination with the online particle counters PAMAS S50, PAMAS S50P Fuel and PAMAS OLS50P. With the help of this method, it can be tested whether the analysed component is clean and ready for use or if the flushing eventually needs to be repeated.