Guardline Driveway Alarm | Outdoor Motion Sensor & Detector | Guardline Security

Guardline 500 Ft. Range Outdoor Motion Sensor

553   |  
$149.99 -33%
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  • Realistic Range: Reliable 500 ft. range tested in extreme conditions.
  • Plug-and-play device: Install in minutes.
  • Expandable: Add extra sensors to detect motion in different areas around your property; Add extra receivers to be alerted throughout your home.
  • NEED MORE RANGE? Try our 1/4 Mile Sensor Set


Easy to Set Up, Easy to Use

  • Plug-and-play device: Intuitive Quick Start Guide has you up and running in minutes
  • No monthly contact, Wi-Fi or phone connection
  • USA-based phone support, live chat and easy to follow video tutorials
  • Industry leading 2-year warranty

Customizable + Expandable

  • Cover your property by placing additional sensors to detect motion in different areas
  • Never miss an alert by adding extra receivers throughout you home, garage, etc.
  • One receiver pairs up to 16 sensors, with 32 unique alert melodies to choose from
  • Place sensors anywhere up to a 1/4 mile from the receiver

Reliable + Realistic

  • #1 most reliable outdoor motion sensor in America
  • Thoroughly tested for reliable, accurate wireless range claims
  • Two decades of extensive testing in all types of extreme weather
  • Passive Infrared Technology picks up motion AND heat-day or night-which means nearly no false alarms from dead leaves

Real People, Real Expertise

  • Superior products from an American small business
  • Over 250,000+ customers since 2001
  • Durable, reliable and backed by our team that cares about earning your trust
  • PEACE OF MIND extends beyond the products we sell-our quality technical support team will go the extra mile for you every step of the way


Installing a DIY Outdoor Motion Sensor System in 30 Minutes

“The Guardline is a premium outdoor DIY motion sensor alert system, but it doesn't need to connect to the internet and share your private info. It's high—tech, but simple and expandable. I had my three sensors mounted and working perfectly in about 30 minutes with the ability to expand to 4 zones with up to 16 sensors at some point if I want.

Here's how easy the install went.” READ FULL EXPERT REVIEW

Peace of mind with the Guardline Driveway Alarm

“We've had the system installed for about a week and it has worked great. Our friend stores his trailer in the back next to our tractor. When he came to pick it up the other day l was alerted when he came up the drive. then when he drove beside the building. And finally when he hooked up the trailer. I also knew exactly when he left the property.”


customer reviews

Customer Reviews

4.4 Based on 553 Reviews
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jack s.
United States

I am not at all

I am not at all satisfied, I've placed it on several differant trees and it keeps beeping every 10 secs. It worked perfectly indoors at about 20 feet. thank you I am disatisfied. I placed the unit on several differant trees and it keeps beeping every 10 sec. indoors it worker great at about 20 ft. thanks Jack Smaall

Troy O.
United States United States


Dont work batteries are good ones oy last a day the eye sensor is weak

Harvey E.
United States United States

Awesome product for that added security.

Customer service is STELLAR. I had a minor issue but it was quickly and very smoothly worked out. I highly recommend.

Preston A.
United States United States

Beyond Satisfied

I set up my eight motion sensors yesterday and I discovered two important things. First, when I began 'testing' the first motion detector I'd set up, I was delighted to discover that it even works when the room is pitch black in darkness, something that I hadn't even considered asking when I was evaluating Guardline. The second point was that I didn't realize that I could have two receivers reacting to the very same 8 sensors at the same time. I found this out by watching one of the company made videos. I immediately ordered a second receiver. For me, this means that I can have one unit upstairs and keep it up there and another downstairs. Definitely pleased with Guardline. And yes, I'm using these units INSIDE my home. Here's a tip: instead of ******** the units to the walls, I went to Home Depot and bought some velcro strips. I applied one part to the wall where I wanted to position the unit and the other to the backside of the sensor. Works great! I would have rated this ten stars!

Phil M.
United States United States

A+++ customer service

Extremely happy with a company that stands behind its products. Thanks for great customer service


  • Sensor Type: Passive Infrared (picks up heat movement).
  • Sensor Range: Sensor detection up to 40 ft.
  • Sensor to Receiver Range: Maximum 500 feet
  • Zones: Program up to 4 different zones; allows you to distinguish which sensor was triggered and prevent interference. Supports 4 sensors on each zone.
  • Tones: 30 different tones and adjustable LOUD volume.
  • Lights: Flashing number for each zone and low battery lights.
  • Weather: Operating temperature range: -4 degrees to 140 degrees F. Sensors are weatherproof and include a hood for further protection against the elements.
  • Mounting: Sensor can mount to posts, walls, fences, and trees with included mounting hardware. Receiver sits on countertop.
  • Expandability: Can support up to 16 sensors and unlimited receivers in one system. Place different receivers throughout your home..
  • .Frequency: . 914.8 MHz.
  • Field of vision of the sensor: 9 to 12 degree viewing radius, up to 40 ft. distance.
  • Relay: Has powered 12 volt relay.
  • Warranty: Two-year warranty and technical support.
  • Power: Sensor 4 AA batteries; Receiver 12V adapter or 4 AAA batteries (receiver batteries are backup only). Has a power-saving mode, which makes sensor-only sensitive in low lighting.
  • Dimensions: Sensor (with shield) 3.25" x 5.5" x 4". Receiver 5.5" x 5.5" x 4".
  • Includes: 1 sensor, 1 receiver, 1 12V AC adapter, 1 sun shield, mounting hardware.

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Questions & Answers

Q: Does this alarm sense when a person crosses the beam? Or only cars? How is the reciever powered? How is the sensor powered?
Answers (1)
A: HI Mark! The sensor detects heat movement so people and cars trigger it! The receiver has a power cord that plugs into the wall for power. It also has a place for four AAA batteries as a backup power source. The sensor uses four AA batteries.
Q: In some of your photos, I notice the sensor has a little roof...does that come with the sensor?
Answers (1)
A: Yes it does!
Q: 12 to 15 degree viewing radius, What exactly does that look like on paper. This needs a diagram as to what this looks like out in the yard ?
Answers (1)
A: The sensor has either a 9 or 12 degree wide viewing angle. At 40' in front of the sensor, this would cover an area 6' wide (9 degrees) or 10 feet wide (12 degrees).
Q: Your specs say that it works down to -4 degrees F. If it goes below that does it need to be brought inside or can it just stay outside and it just won't work? What do you advise to do with the unit for extremely cold weather below -4?
Answers (1)
A: Hi Alissa, the sensor can work below that temperature - just make sure you are using lithium batteries in it. We have plenty of happy customers up in Alaska using our Guardline driveway alarm!
Q: Can a sensor be added to the base unit to not allow the alarm from going off (vehicle leaving)?
Answers (1)
A: You can add up to 16 sensors to one receiver. The sensors can easily capture traffic from cars entering or leaving your driveway.

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