The Sentry comes with an internal microphone, seen behind the small grill in the image on the right.
Sometimes the most convenient location for mounting the Sentry is not the best place to measure the noise. In this case you can use the SEN-MIC30 Microphone, which comes with a 30m / 100ft microphone extension cable.
The microphone is designed to be mounted unobtrusively in a ceiling or wall panel, leaving just the grill showing. This is to ensure that it does not attract attention as shouting into the microphone can cause unwanted power cut-off.
For the optional External Microphone with extension cable, please add item code SEN-MIC30 at $324.00 to your order.
For more detailed information about installation and wiring of the Sentry please visit our Technical Support web site.
Sentry Music Noise Controller and its optional parts.