Many law enforcement agencies across the U.S. use the Global Positioning System (GPS) to monitor and track a participant’s movement throughout their communities. More importantly, GPS monitoring has proven to be a valuable tool to help ensure that a participant remains within a certain area or out of restricted locations thereby reducing recidivism and helping participants stay on the right path back to becoming productive citizens within their community.

Use the links below to view more information about the specific GPS monitoring devices offered by Sentinel:

How GPS Monitoring Works

Here’s How Sentinel GPS Monitoring Works

  • The participant is equipped with a GPS tracking device;
  • The GPS device captures latitude and longitude coordinates from a minimum of four satellites. Location data along with the date, timestamp, and rate of travel (speed) are processed;
  • Data is collected by the GPS device and transmitted to our National Monitoring Center via cellular towers;
  • Sentinel’s proprietary Sentrak software determines the device’s location and reports the device’s status, and;
  • Based on a predetermined protocol from the agency, officers are notified if a violation has occurred.

For more information about any of our products or services, please call Sentinel  at 800.589.6003 or email us at