GTO Wireless Driveway Alarm
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Keep track of the comings and goings on your property with this wireless electro-magnetic sensor alert system. When a vehicle passes the sensor, the receiver emits and audible tone and lets you know someone's there. Used in combination with the GTO and Mighty Mule Automatic Gate Lock, (FM143/fm144) adds an additional layer of security for your property.
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Top Customer Reviews
First, driveway alarms do NOT detect "vehicles." They respond to infrared motion - a motion detector - caused by the movement of nearby objects, or they detect local changes in magnetic flux caused by the movement of a nearby metallic object. In most single home applications, motion detecting driveway alert systems will respond to the movement of nearly anything - birds, pets, people, deer, windblown trash. So motion detectors are not a good idea for settings where those variables are likely, but may work well in more controlled environments.
Magnetic field detection units - like the Mighty Mule FM231 (also sold as the GTO 4450)and the FM131 work differently. They will only respond to changes in magnetic fields - but since most deer, pets, birds, trash, and people aren't terribly magnetic they're fine in situations where motion detectors won't be suitable. (It's the same concept used in anti-submarine warfare, where sub hunters try to find subs in the ocean depths by monitoring the changes in the magnetic field a moving steel sub makes. Pretty cool for under a hundred bucks.)
I purchased this specific unit, the FM231/GTO 4450, after a couple of years of living with the FM131. The 131 worked, but its sensor and transmitter unit shared the same small green plastic housing that was mounted on the end of a pvc tube about 30" off the ground.Read more ›
The transmitter is 33 ft from the white line on the road with the probe 12 ft in the middle of the gravel driveway. We put the line connecting the probe and transmitter inside 1 inch pvc pipe and it is buried about 8 to 10 inches deep. Most cars drive over the top of it.
The receiver is in my shop about 6 ft off the ground and is about 50ft from the transmitter. I still get the random false beeps from a passing school bus or BIG truck. I can live with that. It has alerted me to every car pulling in. My old dog still reponds sooner but only when he's awake.
Well worth the money.
Most Recent Customer Reviews
We have a very long driveway so when the alarm goes off we have plenty of time to see who is coming. Wouldn't live with out it !Published on December 8, 2014 by John Waldron
This product worked good, for almost one year. Now, despite a lot of tinkering, it doesn't do much of anything. It seams to have a mind of it's own. Read morePublished on July 14, 2011 by Daniel Russ