A system and method for monitoring and/or detecting the flow of one or more fluids in a fluid system including leak detection system integral to the fluid system (e.g., at any point along a conduit, at a connection between conduits such as at a fitting assembly, etc.) configured to detect incipient, early stage levels of the leak. Based on one or more factors related to the fluid and/or the leak, the methods, devices, and systems disclosed herein can provide an indication of a suitable action or process in response to the fluid or the leak including performing preventative maintenance or providing an indication of the need of maintenance in response to the leak.