Method for monitoring the oil level of an oil-lubricated compressor, oil level monitoring system for carrying out the method and compressor system having such an oil level monitoring system

An oil level monitoring system for carrying out a method for monitoring an oil level of an oil-lubricated compressor, the system comprising:

• at least one oil level sensor for detecting an oil level, representing the compressor oil level, of an oil in an oil reservoir of a compressor;
• and
• an evaluation unit for reading sensor signals from the at least one oil level sensor, which evaluation unit stores at least one relay criterion and at least one verification criterion,
• wherein the evaluation unit is configured to relay an oil level signal in response to both the at least one relay criterion according to the read oil level and the at least one verification criterion being satisfied.