Guardline uses motion detectors with passive infrared technology (PIR) to spot vehicles coming up your driveway. The sensors can detect motion up to 40 feet away, which should cover most driveways and even shorter stretches along your property line. Still, you might want to consider Dakota Alert for better options to monitor your land's perimeters.
The sensors can withstand all types of weather and work without interference. The receivers have a battery backup and a 12-volt relay to link them to additional external alarms or sirens.
You can customize almost every detection setting with Guardline. We're big fans of the four distance settings—13 feet, 23 feet, 26 feet, and 40 feet—so you can ignore people walking up a path on the other side of your driveway. There's even a unique speed sensitivity setting, so passing wildlife moving slower than 2 mph don't trigger your alarm unless you want them to.
If you don't want the system sending alerts during the day, you can turn on Night Mode to stay on top of nighttime visitors. Plus, you can remove a small cover over the motion sensor to increase the field of view for earlier alerts.
The wireless range allows for a quarter mile between the sensor and the receiver, although heavy foliage and thick walls will reduce this distance. This is shorter than the full- and half-mile ranges from Dakota Alert and eMACROS, respectively, but perfect for most people.
This driveway alarm comes with 32 customizable alert sounds and is expandable to include multiple sensors—up to 16. (Four zones with four sensors for one receiver.) You can pair specific sounds with each zone, so you'll always know where the motion is without looking.
We love Guardline for its customization options and flexibility—and we think it's perfect for most properties. The quarter-mile range isn't the longest on our list, but it's great for everything except gigantic properties.