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GTO Wireless Driveway Alarm

by GTO
3.0 out of 5 stars 6 customer reviews

Currently unavailable.
We don't know when or if this item will be back in stock.
Currently unavailable. We don't know when or if this item will be back in stock.

Product Description

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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Customer Reviews

Top Customer Reviews

This is a good product, but you have to understand its specific limitations and the limitations of all driveway alert systems. The product does work, and if installed carefully in the right environment, may work well. It may in fact work better than several competing units, including Mighty Mules' FM131, which I'd previously bought and used for a couple of years.

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.
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This is a good product but it is not "plug and play", it will need some tweaking about placement. I set it up on top of the ground first for about a week. Moving it a little at a time. We have a gravel driveway that is from 16 to 24 feet wide. I placed it 20 feet from the road which is busy. Everything made it go off that went down my side of the road. So I moved it 30ft away. I got everything that turned into the drive except the far side (@ 15 ft away from probe) We started moving the probe away from the transmitter a few feet at a time. The results after a week of playing with it are as follows:
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.
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Have been very unhappy with this product...will sound an alarm when there's absolutely nothing to set it off. Will not alarm when there is large vehicles driving by it in our driveway. We've tweaked the sensitivity. moved the monitor, etc with no success. Am considering returning it to the manufacturer.
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