Any smart parking system has to begin with an accurate detection system. The ability to tell if a car is in the space, or not. Sounds simple, but it's not. Many legacy parking vendors will tout their detection system, but unfortunately single-source detection systems are notoriously inaccurate. Each individual technology has it's own short comings that will lead to parker confusion and frustration once it is deployed out in the wild parking jungle. The worst possible result of inaccuracy is improper tickets being issued.
Sentry Is Accurate
We have done significant video analysis (ask legacy vendors about their video analysis) on millions of parking sessions that has led us to develop, and constantly improve, our patent-pending algorithm that uses the best that each current detection technology can provide and fuses them together to provide a more powerful and accurate solution. Two key differences that separate Sentry from the legacy vendors are video and processing power. The ability to "see" the space with video and use multiple computer vision algorithms and cognitive learning in concert with sensor (puck or radar) data, along with the local processing power (because we're not constrained with limited power sources) to crunch all that data in the meter itself and quickly provide the right answer a smart system requires. Nothing exists in the industry today that matches Sentry.
Sentry Loves Bike Lanes
This is becoming more prevelant as towns integrate bike paths into their streets. Towns that have legacy meters with single source detection sensors have found that the solution becomes completely unreliable as they moved the parking area away from the curb. This leads to bad tickets being issued, and with no video of the parking sessions and no human review on all violations like Sentry, this in turn leads to wasting parker time contesting the tickets, lack of confidence in the overall system as well as wasting municipal resources dealing with the bogus tickets. As mentioned above, Sentry's state-of-the art, patent-pending, detection system uses multiple inputs and analyzes that data in real-time providing an accurate determination of vehicle presence. Moving vehicles away from the curb does not impact Sentry's detection system because magnetometers can be deployed in the parking lane along with the computer vision in Sentry meters and sticks.