Method for detecting and monitoring condensate in an oil system of an oil-injected compressor or vacuum pump

A method for detecting and monitoring condensate in an oil system (2) of an oil-injected compressor (1) or vacuum pump, having an inlet (4) for gas to be compressed and an outlet (5) for compressed gas, wherein the method comprises the following steps:

• determining a humidity at the inlet (4) and at the outlet (5) or downstream of the outlet (5) of the compressor (1) or vacuum pump;
• determining an amount of water vapor that enters the compressor (1) or vacuum pump and amount of condensate that exits the compressor (1) or vacuum pump based on the humidity determined at the inlet (4), on the one hand, and at the outlet (5) or downstream of the outlet (5), on the other hand;
• determining an amount of condensate that remains in the compressor (1) or vacuum pump by determining the difference between the amount of condensate that enters the compressor (1) or vacuum pump and the amount of condensate that exits the compressor (1) or vacuum pump;
• storing or keeping track of the amount of condensate that remains in the compressor (1) or vacuum pump;
• repeating or continuously carrying out the aforementioned steps at regular intervals and storing or keeping track of the amount of condensate and how long said condensate remains in the compressor (1) or vacuum pump.