System and method for sensing lubricant and engine health

A method comprising:

• generating stimuli at a sensing region circuit of a sensor during an operational life of an engine, wherein the sensor is in contact with lubricant associated with the engine;
• receiving signals from the sensor, the signals representative of responses of the lubricant to the stimuli;
• analyzing the responses to determine a characteristic of the lubricant that represents one or more of a total base number (TBN) or a total acid number (TAN) of the lubricant;
• and
• determining an unhealthy state of one or more of the engine or the lubricant based on the characteristic TBN and/or TAN of the lubricant that is determined.

A system comprising:

• a sensor configured to be in contact with a lubricant within a rotating equipment of a system, wherein the sensor is configured to generate detectable stimuli at different times during an operational life of the rotating equipment;
• and
• one or more processors configured to receive signals from the sensor, the signals representative of responses of the lubricant to the stimuli, the one or more processors configured to analyze the responses and determine a characteristic of the lubricant that represents one or more of a total base number (TBN) or a total acid number (TAN) of the lubricant,
• wherein the one or more processors are configured to determine an unhealthy state of one or more of the engine or the lubricant based on the characteristic of the lubricant that is determined.