Ajax MotionCam: Photo-Verifying Motion Detector for the Home

The Ajax MotionCam is a wireless motion detector with a built-in camera. When the system is armed and someone walks into its view, it raises an alarm and sends one or more photos to the Ajax app, so you can see what set it off rather than guessing. The maker describes it as a wireless PIR motion detector with extended photo verification possibilities¹. It is part of the Ajax range, so it needs an Ajax hub to work, and it is designed for indoor use only¹.

The headline numbers are these. It detects movement at up to 12 metres, and the maker recommends mounting it at a height of 2.4 metres². Its horizontal field of view is 88.5°¹. With the bundled batteries it runs for up to 4 years when the Photo on demand toggle is disabled, and up to 3 years when it is enabled³. It carries Security Grade 2 and a 2 year warranty¹.

This page covers what the detector does, how far and how well it sees, how the photo verification works, how to look after the batteries, where it must not be fitted, how to set it up and test it, and where to get support. It is one product in a wider choice: if you are still deciding what kind of detection you need, the guide to burglar alarms and the comparison of alarms or cameras set the options out.

What the MotionCam does and who it suits

The MotionCam is a passive infrared (PIR) detector with a camera bolted on. In normal use it watches a room or a zone, and when it is armed and detects movement it triggers an alarm and takes pictures. The maker's description is simple: the built-in camera is activated if the detector is armed and motion is detected¹. It takes a photo only when armed, so it is not photographing the room while the system is disarmed².

The point of the camera is verification. A plain motion sensor tells you something moved; the MotionCam tells you what moved, by sending an image to your phone through the Ajax app. That helps you decide whether an alert is a genuine intruder, a pet, or a curtain moving in a draught, before you act on it. The same idea runs through the wider guide to home cameras and CCTV, which explains how photo and video verification fit into a home security setup.

There is a second use the maker builds in. On models with the feature, the camera can take pictures automatically when Ajax fire detectors are triggered, to help identify the cause of a fire alarm¹. That feature is disabled by default¹.

Who it suits: a household already running an Ajax system that wants to see, not just be told, what tripped a detector in a hallway, landing or living room. It is an indoor detector, so it is not the unit for a garden or a driveway; the maker makes a separate outdoor version, covered on the Ajax MotionCam Outdoor page. If you have no Ajax hub, this detector is not a standalone camera and will not work on its own.

Detection: how far it sees and how wide

The detection figures decide where the detector will and will not do its job, so they are worth getting right before you drill anything.

The detection distance is quoted for the detector installed at the recommended height, so a unit fitted lower or higher will not match it exactly. The maker's outdoor manual shows how much the pattern changes with height and sensitivity, quoting different distances at different settings, which is a reminder that these are working figures rather than guarantees⁴. The temperature compensation range matters in a British home because it means the detector is designed to keep working across ordinary indoor temperatures rather than drifting with the seasons¹.

The maker also builds in SmartDetect, a software algorithm for false alarm prevention¹. That is the maker's description of how it filters out the kind of movement that should not count as an intrusion.

Photo verification: resolution, number of shots and delivery time

The camera is the reason to choose this detector over a plain sensor, so the photo settings are the part to understand. You choose how many photos are taken per alarm: no photo, a single photo, or a series of 2, 3, 4 or 5³. Series of 4 and 5 are only available at the lower resolutions of 320 × 240 or 160 × 120 pixels³. The default is that the first ten alarms are accompanied by an animated series of three images at 320 × 240 pixels³.

Resolution is a straight trade between detail and speed. The maker offers three settings, and the number of images you can take in a series depends on which you pick:

The maker's own advice is to use the maximum photo resolution only when the information content is insufficient, because the higher setting costs you time and battery⁵. For most households the default 320 × 240 is the sensible balance: detailed enough to tell a person from a shadow, without the extra cost of the top setting.

You can also limit how many alarms carry a photo. The maker lets you specify 1 to 10 alarms, or set it to send a photo each time the device is triggered². That cap protects battery life and stops you being flooded with images.

Batteries: up to 4 years, or up to 3 with Photo on Demand on

Battery life is the figure most people ask about, and it depends on one setting. With the bundled batteries and the Photo on demand toggle disabled, the detector runs for up to 4 years; with the toggle enabled, up to 3 years³. The maker's support article gives the same pair of figures and sets out the assumptions behind them: normal PIR sensitivity, the Delay When Entering setting disabled, a series of three photos at 320 × 240 per alarm, and a ping interval of 36 seconds⁵.

The detector uses 2 × CR123A batteries, pre-installed, each with a capacity of 1,550 mAh¹. The maker lists Huiderui, Panasonic or Duracell as the battery manufacturers, UL listed¹. When the batteries run down, the system sends a low battery notification, and after that the detector can keep working for up to 2 months³. The maker recommends replacing them as soon as you get the notification rather than using up that margin⁶.

To replace them, the maker's steps are: remove the detector from the SmartBracket mounting panel, turn the device off, unscrew the 3 screws and remove the back lid, replace the batteries observing polarity, then turn the detector on and check the battery status in the app⁷.

Pet immunity depends on the sensitivity level you choose

If you have a cat or a dog, the pet immunity figure is the one to check against your animal. When properly installed and configured, the maker says the detector does not react to animals up to 50 centimetres tall³. That covers most cats and small dogs, but not a large one.

Sensitivity is set in three levels, adjusted by a PRO installer or by a user with admin rights in the Ajax app⁸. At the Low setting the detector does not respond to animals up to 50 cm tall³. The maker also notes that a detector with a high sensitivity of the PIR sensor can be triggered by large and active pets or by other thermal interferences⁹.

The maker's testing rule is a useful check. If, during the detection zone test, the detector does not react to motion in 5 cases out of 5, the sensitivity can be increased⁴. In other words, test first, then adjust, rather than turning sensitivity up on a hunch.

Where the MotionCam must not be installed

Getting the location wrong is the most common reason a detector misbehaves, and the maker is specific about the places to avoid. Do not install it outdoors, in direct sunlight, opposite objects whose temperature changes rapidly, opposite moving objects with a temperature close to that of the human body, in places with fast air circulation, where objects or glass structures may obstruct the view, or in premises with temperature and humidity outside the permissible limits³. The maker's warning is blunt: installing outdoors can lead to false alarms and detector failure³.

Two further rules matter. The detector does not detect movement behind glass, so do not fit it to look through a window or a glass partition². And it should go on a flat, stable surface such as a wall of a house or a solid fence, because a shaky surface results in false alarms¹⁰.

The detector also has masking sensors that react to hindering, covering and painting the lens⁸. Painting over the lens with varnish or paint raises a masking alarm after 100 seconds¹⁰. That is a security feature: it tells you if someone has tried to blind the detector.

Setting up, testing and checking the signal

Set-up is done through the Ajax app and the hub, and the maker's guidance is to place the detector where the radio signal is strong. Aim for 2 to 3 bars of Jeweller and Wings signal strength in the app; if you see a single bar, move the device, because repositioning it even by 20 cm can significantly improve reception⁴.

The detection zone test is the step that confirms the installation is right. It tests the motion and masking sensors and checks whether the device is installed correctly to detect all alarms⁶. Run it after mounting, walk the zone, and adjust height or sensitivity if it does not respond as it should.

The detector connects to one Ajax hub, and the maker says connection to other hubs, radio signal range extenders, ocBridge Plus and uartBridge is not provided³. The outdoor version is specifically incompatible with the Hub and Hub Plus, the ReX Jeweller range extender and third-party central units⁴. Check your hub against the maker's list before you buy. If you are building the system around a hub, the Ajax Hub (2 Plus, 2, Plus) page covers the control unit itself.

Firmware matters for some features. Photo by schedule needs hubs with firmware OS Malevich 2.19 or later, and HDR needs device firmware 16.59.36.5 or later¹. Updates are done in the app: go to the Devices tab, select the camera, open Settings with the gear icon, check the version and release notes, then tap Next to download and Install to confirm⁹.

Standards, security grade, warranty and support

The MotionCam U Jeweller carries Security Grade 2 and is certified to the EN 50131 series of alarm standards, with a certificate issued by TREZOR TEST s.r.o.¹¹. Grade 2 is the grade most often specified for domestic intruder alarms, and it is the figure an insurer or installer will look for. If you are checking whether a product meets the standard your insurer expects, the guide to police-approved products explains what the markings mean.

The warranty is 2 years after purchase, and it does not extend to the bundled batteries². The MotionCam U Jeweller is listed with a 24 month warranty¹¹.

For help, Ajax Technical Support can be reached at support@ajax.systems, and the maker says its chatbot and technical support team are available 24/7². The maker also notes that in half of cases technical issues can be solved remotely, so it is worth contacting support before returning a unit⁴.

If you are weighing this detector against a camera or a simpler sensor, the comparison of burglar alarm or CCTV camera and the guide to monitored alarms will help you decide what level of response you want. And if you are fitting detection as part of a wider plan, the home security guide is the place to start.