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Door Locks & Access Control
Garage Door Control
Alert System Type
Motion Alert
Car & Garage Product Type
Garage - Door Control
Sensor Type
Pressure / Floor
Battery Operated
Ease of Installation
Intermediate (Installs < 60 minutes)
Skylink Technologies
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Protect Your Home and Family With a
Garage Door Monitoring System

Skylink GM-318 Household Alert Garage Door Monitoring System
Skylink GM-318 Household Alert Garage Door Monitoring System
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Household Garage Door Monitoring System Household Garage Door Monitoring System Household Garage Door Monitoring System Diagram
Skylink GM-318 Household Alert Garage Door Monitoring System
Item# 7311GD
Price: Normally $20.95 
Hot Deal $16.31
Free shipping on orders over $50 - See Details


  • Receiver expands to four different sensors
  • Visual and audible alerts
  • Easy to install and use

Essential Info

Leaving your garage door open unnecessarily can be both dangerous and costly. But it's easy to forget that it's open when you're carrying in groceries or the mail. Now you can install a garage door sensor that alerts you to the status of your garage door with audio and visual indicators. Best of all, the Household Garage Door Monitoring System is easy to set up, with the sensor alerting the receiver wirelessly.


What's Included

  • Household Alert® Sensor
  • Household Alert® Receiver
  • Power adapter
  • 3V lithium battery
  • Clip
  • Double-sided foam mounting tape
  • 4 3 x 18 screws
  • 1 2 x 5 screw
  • Instructions
  • More Info

    The garage door sensor mounts near the bottom of your garage door and sends a wireless signal to the receiver in your house when the garage is opened. With its range of 300 feet, you'll be able to place the receiver in any convenient location in your home. Add an additional Garage Door Sensor if you have an additional door you want to protect, or add extra Household Alert Receivers in other areas of your home. If you need to cover a distance further than 300 feet, use the Household Alert Wireless Repeater to extend the communication range between the Skylink wireless devices and ensure the security of your home.

    The included receiver will control up to four different sensors. Sold separately, you can add a Household Motion Alert Sensor or a Household Door/Window Alert Sensor for security, or a Household Water Alert Sensor for water leaks. If you're planning to add a motion sensor, you can save by purchasing the Household Alert Combination Set.

    When multiple sensors are installed, only the corresponding zone LED will flash, so there will be no confusion. In addition, you'll know which zone is being triggered by the number of beeps emitted in succession. If you're planning to leave your garage door open while you work in your garden or on your car, the audible alert can be muted easily.



    Manufacturer Product No.:GM-318
    Dimensions:Receiver: 3 7/8" x 2 5/8" x 1 1/4"; garage sensor: 2 3/8" x 2 3/4" x 1 1/2"
    Operating Range:300 feet
    Approvals:FCC and IC compliant
    Warranty:1 year, limited

    Important notes:
    Only merchandise credit for defective items returned within 30 days of purchase. No other returns allowed on this item.
    Manufacturer contact information: Skylink Technologies Inc, Tel: (800) 304-1187


    Household Garage Door Monitoring System  Household Garage Door Monitoring System  Household Garage Door Monitoring System Diagram   
    Household Garage Door Monitoring System  Household Garage Door Monitoring System  Household Garage Door Monitoring System Diagram   


    103 Ratings
    5 star: 37%  (38)
    4 star: 19%  (20)
    3 star: 11%  (11)
    2 star: 7%  (7)
    1 star: 26%  (27)
    Average Customer Rating
    (103 customer ratings)
    Share your thoughts with other customers
    LORALEA -- duluth, MN   4/15/2014
    Very Poor product the range from the base unit to the sensor is so weak that it did not work.
    GERALD -- aurora, CO   1/30/2014
    all worked horribly 3 componenets of the total order were bad and confirmed bad by the manufacture. Fortunately you did accept a return and a re-order of the later models of Skylink and they worked fabulous.
    ARNEL -- youngstown, OH   10/12/2013
    Does not work if signal is blocked by wall. The only way it worked for me is when I extended the antenna by 6 feet. This is my second unit so I figured all of them are same. It works for me at this point I was able to place it in the bedroom. So far ok.I would recomend the black extended radius mybe it works better. The fist unit the batt drained in 7 days hope this last longer.
    PAT -- st. louis, MO   5/6/2013
    This is an excellent product to provide more home security at a very inexpensive price. It is simple to install & use.
    JEFFREY -- fort worth, TX   3/21/2013
    This unit could not transmit/receive a signal 25 feet thru one regular wall, returned/refunded. I used a different brand (no longer made)in the past and it worked fine.
    WILLIAM -- chepachet, RI   10/1/2012
    Works as advertised. Very easy to program and install.
    ROBERT -- poway, CA   8/16/2012
    Works great but I need to extend range and bought the RP-318 below but it doesn't work and i CAN'T GET THE RETURN CODE.
    DAVID -- blacktown, XX   7/12/2012
    Does exactly what it claims to do. Fast delivery was good
    PHILIP -- buckeye, AZ   4/21/2012
    installation simple, works well except occasional loss of signal which can be reset easily. Good value for the purpose purchased.
    LARRY -- plano, TX   3/11/2012
    Junk. Worst item ever bought from Smarthome. Would love to send back but threw box away.
    JEFF -- toronto, ON   11/25/2011
    The monitor sensor was defective, when the pin drop down to detect that the gararge door was open does not work 100% of the time. Dissappointed with the product, it was not as reliable as per the reviews online.
    WINCHELL -- hayward, CA   10/13/2011
    easy to install but the system is unreliable. Gives false reading. Had to keep resetting it.
    BRIAN -- granbury, TX   6/25/2011
    Great product. Works at a longer range than I would have expected. Ordered another door sensor since the first one worked great.
    PAUL -- watchung, NJ   6/23/2011
    operational range is inadequate, will try enlarging the antenna wire.
    WILLIAM -- lansing, KS   6/23/2011
    The GM-318 seemed to be the perfect solution to our need for monitoring the opening and closing of our two garage doors. Our doors are insulated steel and the lower edge was not wide enough for installation of the sensors, but a 4 inch by 6 inch piece of thin Masonite inserted in the lower steel channel provided a surface large enough to mount the sensors. They were easy to program to the monitor unit after finding a location in the living area nearer to the garage than I wanted. I found the usable range to be only about 25 feet. The most troublesome problem is that since the sensors are located at the floor level on the doors, the signal from the far away door is blocked by the vehicle parked in the near side. When the near side vehicle is absent the units work perfectly. I have to silence the monitor when the near vehicle is present in the garage. A stronger signal is needed which would probably require a higher voltage battery. The option of extending the sensor's antenna to a higher location might solve the problem. Single door installations probably won't have this problem. I also solved the problem of having the door open for extended periods, (washing the cars) by placing a rubber band around the sensor to hold the plunger in the off position. A switch to deactivate the sensor would have been nice for those occasions. Some improvements would make this a teriffic product.
    JAMES -- plano, TX   3/31/2011
    It only would work a couple times before I would have to reset it because it would not turn off the alram when closed. I reset it several times and then gave up.
    MARC -- rye, NY   3/13/2011
    The system works well but the adhesive foam that sticks to the door does not last and it fell. The other alternative to the glue that does not work is to drill the door to instakk with screws is also nt practical if you have a new or steel door
    BILL -- abingdon, MD   1/13/2011
    We have had one of these garage door monitoring systems on our garage for years and since we are so happy with the product we purchased 2 more for other family members. It is an easy reminder that the door has been left open.
    AL -- lake tapps, WA   1/13/2011
    I am using three garage sensors with the monitor. It occasionally works but most of the time one or most of the sensors report incorrectly. Very flaky.
    Al Lykken -- sumner, Washington   12/20/2010
    I installed 3 sensors for my 3 detached garages. It tends to work, but is very flaky. If one garage door opens and closes it will sometimes set off another sensor. I have to unplug and replug the main unit to reset.


    Household Alert Wireless Repeater       
    Household Alert Wireless Repeater       

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