Xandem Tomographic Motion Detection (TMD) - Unbeatable Full-Coverage Motion Sensing Technology

High-Value Asset Protection
  • Provides full-area coverage
  • Can't be blocked, masked, or fooled
  • Remains completely hidden
  • Prevents thieves from "scoping" the site
Testimonial: "We crawled on the ground, underneath shelves and slid along walls... we tried everything to beat Xandem TMD but couldn't. It's like James Bond technology." Mike Katsenevas, Crown Jewelers and Pawn
Dirty and Cluttered Environments
  • Sees through clutter and obstructions (including walls)
  • Is fully functional in dirt, dust, buildup
  • Is immune to birds, rodents, insects, temperature changes
Testimonial: "Before Xandem, we lost over $250,000 worth of tools and machinery in past break-ins. TMD is the only motion sensor we've found that works in our dirty shop. It doesn't false trigger, and covers all of our square footage." Randy Max, Brahma Group Inc.
Aesthetic-Sensitive Areas
  • Remains completely hidden
  • Can be installed inside walls
  • Can be installed inside furniture
Testimonial: “Our project required that even with a very high specification of smart home, very little technology should be on show due to the interior design implications. After much research, the Xandem solution stood out. We purchased a demo kit which worked very well and so specified the solution for the project.” Nathan Williams, Redwood Technical Services
Click here to find out what real Xandem customers say about TMD. Read our TMD case studies, TMD solutions page and a comparison with other technologies for more information.

Our TMD kits include:

  • Sensing nodes: The nodes are the devices that are placed around the area of interest.
  • Processing unit: The processing unit has configurable parameters (like sensitivity) and connects to a standard panel using normally-closed contacts.
  • Hardware: Mounting screws and grommets for installation.


  • Senses through obstructions: Infrared and optical sensors are often obstructed in environments where equipment and inventory move frequently. Xandem TMD senses through walls and obstructions, so the end user is free to use their space as they need without worrying about sensor blockage.
  • Invisible: Infrared and optical sensors must remain exposed to the environments that they sense. That means intruders and visitors can "scope" a site while planning an intrusion. Xandem TMD has the option to remain completely hidden, thus reducing significant vulnerabilities and enhancing aesthetics.
  • Complete coverage: TMD senses motion over areas, not just perimeters. TMD can sense areas up to 10,000 square feet depending on density of obstructions and number of nodes.
  • Dirty: Infrared and optical sensors can completely break down when lenses become dirty. Dirt and dust have no effect on Xandem TMD.
  • Immunity: TMD is not triggered by changes in temperature, light, small animals, smoke, insects or dust.
  • Plug and Play: TMD is easily integrated with standard panel equipment through normally-closed contacts.

A Xandem TMD system is built with two kinds of devices: nodes and a processing unit. Multiple nodes surround the area where motion is to be detected. The nodes form a powerful mesh network that senses when objects move within the area of the mesh, even through walls and obstructions. Each node is not a sensor, the mesh network connecting the nodes is the sensor. The processing unit is a gateway with normally-closed relays that connect to any standard panel.

Xandem motion detection integration

TMD User Guide Download

Coverage Areas

TMD is sold in kits of 6, 10 and 15 nodes. The best kit size depends on the square footage of the area you want to cover, and the density of the obstructions within the area. Use the table below as a guideline for choosing a kit size. These sizes may vary depending on the environment.

TMD Kit Size
(Number of nodes)
Light Obstructions
(Drywall, plastic, thin wood)
Heavy Obstructions
(Brick, concrete, large metal objects)
6 Nodes 500 square feet 500 square feet
10 Nodes 2000 square feet 1000 square feet
15 Nodes 5000 square feet 2000 square feet

Technical Specifications

Specification Node Processing Unit
Physical Size 1.5" x 3.0" x 0.6" 1.5" x 3.0" x 0.6"
Supply Voltage 3-12 Volts 3-12 Volts
Current per node/PU (typical) 34-50mA 34-50mA
Power per node/PU (typical at 6V) 240mW 240mW
Integrated contacts None Normally closed relays
Max RF transmit power 4.5dBm none
RF frequency Minimum: 2.403GHz
Maximum: 2.480GHz
Channel bandwidth: 5 MHz
Number of channels: 16
Minimum: 2.403GHz
Maximum: 2.480GHz
Channel bandwidth: 5 MHz
Number of channels: 16

How large of an area can I cover?
The total area coverage size depends on how many nodes you use, and how heavy the obstructions are. In thin-walled or open areas TMD can cover larger areas than in heavily obstructed and dense environments. See the "Details" tab for approximations.

How close does the processing unit need to be in relation to the nodes?
The processing unit must be able to “hear” each and every node. For best results, the processing unit should be placed somewhere near the node network, then wired to a panel or other interface device.

What frequency does the system use?
Xandem TMD operates on the 2.4GHz internationally unlicensed spectrum. No licensing fees or permission from the government is required to use the system.

Are the radio waves used by TMD harmful to humans or animals?
No. The amount of radio power used by Xandem TMD is extremely low. An entire TMD system with all nodes:
broadcasts about 500-1000 times less wireless power than a single cell phone
broadcasts less radio power than a wifi router

Will other wireless equipment and Xandem TMD interfere with each other?
In some cases, yes, but Xandem has carefully developed our products to be robust in the presence of other devices using the 2.4GHz spectrum. In cases where interference is an issue, the channel can be changed to an open frequency.

Can the system run on batteries or does it need to be hard wired?
Each node consumes 35-50mA of current and can run for 3-5 days on two AA batteries. For rapid deployment applications, this may be enough. For permanent installations, the nodes should be wired to a DC power supply.

Can the system be jammed by intruders?
Xandem has developed anti-jam protection features in each node and processing unit. If an intruder jams, an alarm can be triggered immediately.

Will the system detect motion when a rodent or pet moves?
The system can be easily set to avoid triggering when small pets and rodents move within an area. As the weight and size of the animal increases, thresholds should be increased as well to avoid triggering. Nodes should be placed in areas where pets can’t move within about 1 meter.

Buy TMD Now

Price: $695-$1395 Are you an integrator or installer interested in reselling Xandem products to your clients? Are you interested in purchasing TMD in volume? Check out our TMD Demo Kit and reseller program.

See the User Guide and Details tab for sizing information.