Arlo Does Not Detect Motion Through Glass: Six Simple Solutions


The greatest home security camera is Arlo.

It is equipped with motion detecting technology that gives the homeowner real-time notifications in the event of an incursion or human activity.

Many reviews rank Arlo as one of the best home surveillance cameras, but its inability to detect motion through glass is a significant downside.

Here’s how to configure your Arlo cameras so that they can detect motion through glass:

  1. Understand that glass inhibits the sensing of motion.
  2. Install your Arlo camera outside.
  3. Buy pixel-enabled Arlo cameras.
  4. Install the camera on the ledge or overhang of the window.
  5. Keep the window open.

Use non-insulating glass on particular windows.

This section will explain why glass impedes the motion detection capability on the majority of Arlo cameras and how to resolve this issue.

How to Fix Arlo’s Inability to Detect Motion Through Glass

Using PIR sensors, Arlo cameras cannot detect motion through glass. Glass insulates heat, while PIR sensors detect motion by monitoring variations in temperature.

Nevertheless, pixel-based Arlo cameras may detect motion through glass by analyzing variances in pixels as opposed to measuring changes in temperature.

Install your Arlo cameras outside if you intend to utilize them for motion detection. Notably, Arlo may be mounted on exterior walls, above the door, on window sills, and under an overhang.

1: Recognize that glass prevents motion detection.

Unreliable motion detection through glass.

Arlo, like the majority of motion-detecting cameras, employs passive infrared detection (PIR) to detect motion and notify the homeowner.

Others detect motion via frame-by-frame detection, sometimes known as pixel-based technology.

Typically, passive infrared technology detects motion by detecting changes in ambient temperature.

Glass, however, is an insulating material, therefore its temperature is not affected by its surroundings.

As a result, glass impedes heat detection, preventing cameras with passive infrared detection sensors from detecting motion.

Although Arlo cannot detect motion through glass, this issue can be resolved by following these instructions.

2: Installing Your Arlo Camera Outdoors

By selecting an appropriate location outside your home, your Arlo camera can detect any ongoing activity.

This is possible without the window glass preventing passive infrared sensors from detecting changes in temperature.

You will need a location with sufficient space to set the field of view and focus range so that the camera captures as much of the intended region as feasible.

For instance, when installing the Arlo Pro, you should give it a 100° field of view and a focus range of at least 2 feet, focused at a specified target such as your front gate.

How to Mount Your Camera on an Exterior Wall

Most Arlo cameras attach the base of the mount to the wall using double-sided adhesive. To place the camera on an exterior wall, however, you will need more than double-sided tape.

Two or more long screws can be used to secure the camera mount base to the wall, ensuring the camera remains intact even in adverse weather conditions.

Follow these instructions to attach your Arlo camera to an exterior wall:

  1. Remove the back screw from the base plate’s rear.
  2. Attach the base plate to the wall using the two big screws
  3. Connect the camera’s front portion to the wall mount
  4. Position the camera such that its focal point is directly on the subject.

By putting it on an exterior wall, you prevent window glass from interfering with passive infrared sensing. Additionally, you prevent misleading motion sensing caused by reflections from the window.

I recommend this Adjustable Indoor and Outdoor Wall Install from if you need to mount your Arlo camera outside.

It is simple to install, is compatible with the majority of Arlo cameras, and comes with a 3-month guarantee.

Make sure that you mount it high enough, away from intruders and other undesirables. Ideal height is around 10 feet above the ground.

3: Buy Pixel-Enabled Arlo Cameras

Suppose it is more convenient for you to install your Arlo camera indoors. In this instance, I recommend purchasing a camera with Pixel-enabled motion detection capabilities.

The Arlo Q and Arlo Q Plus cameras are examples of pixel-enabled Arlo cameras.

This camera detects motion by analyzing the changes in pixels to determine whether or not there is movement.

When a certain percentage of pixels change, motion detection is triggered. If the percentage is set to a low value, a greater number of pixels will change before the camera detects motion, and vice versa.

However, there are several disadvantages to Pixel-based Arlo cameras:

  • Pixel-enabled detection cameras consume more power and lack an internal battery, unlike passive infrared detection cameras.
  • The camera must use wires to connect to a power source (They are hardwired)

I recommend this Arlo Q Plus HD Security Camera from if you want to replace your camera with a pixel-enabled alternative.

It is compatible with Alexa and Google Assistant and provides photos and videos of 1080p resolution.

4: Install the camera on the window sill or overhang, number four

Installing your camera on a window ledge or an overhang can improve the quality of your photographs.

Outside of the passive infrared-inhibiting glass, the outer window ledge or window sill is a suitable site. Notably, it enables an unobstructed view of the exterior world for effortless motion detection.

Unfortunately, if you have low-level windows, thieves may be able to see the camera and damage it. However, this issue can be resolved by concealing the camera in a window ledge corner.

The camera can also be mounted on the overhang or soffit.

For this activity, you will require long screws to secure the camera. Before setting up your Arlo camera, you need also verify that it is connected to your wireless Internet connection.

Here is a 7-minute video demonstrating how to mount a camera on a vinyl soffit.

5: Allow Your Window to Be Open

If at all feasible, you should leave your window open to circumvent the glass barrier that impedes infrared motion detection.

In addition, doing so prevents false detections that may occur when your camera focuses on glass reflections.

For optimal results, you should set your camera at a slight downward inclination and around 15 feet away from where you anticipate movements.

It is crucial to install your camera in a secure spot where it cannot be viewed by trespassers or curious bystanders. According to Safewise, selecting the optimal location permits you to monitor a bigger area with a single camera.

Caution: Burglars might easily enter your home, damage the camera and property, and steal your belongings if you leave your window open. Use this strategy only if you reside in an extremely secure community.

6: Use non-insulating glass on particular windows

As previously indicated, heat insulation is the primary obstacle to PIR motion detection by the glass. The majority of homes utilize insulated glass to increase energy efficiency and cut energy expenditures.

However, you may make an exception and utilize older plate glass on a few of your home’s windows.

Older plate glasses lack insulation, allowing more PIR energy to permeate and reach your camera, allowing Arlo’s sensors to detect motion.

Light concentration in a particular location of the old plate glass may interfere with PIR energy, generating a false alarm.

Install the older plate glass on a window that receives no direct sunlight at any point during the day.

Wrap Up

The majority of Arlo cameras detect motion using passive infrared technology. This feature detects motion by the detection of heat movement.

However, most window glass contains an insulating substance that hinders the transfer of heat.

This characteristic prevents such sensors from detecting thermal heat. The only way to circumvent this issue is to position the camera away from the glass.

Alternatively, acquire Arlo cameras with Pixel support that can detect motion through glass. Nonetheless, you must connect it to a power source. Additionally, you should be aware that glass reflections can activate false alarms.