I am working on a way to monitor the status of an air-cooled chiller. Occasionally the chiller shuts itself off due to a diagnostic error, and I'd like to alerted when this happens. I think I should be able to monitor vibration and/or noise levels to detect when the chiller is not running. The chiller is outside, so I need sensors that are either weather proof or that I can mount in a project box. I plan to run wires about 15' from the sensors to an Arduino MKR1000 board that is indoors.
Anyone have experience with or recommendations for sensors for this type of project?