RANGE-R® Frequently Asked Questions

How far away does RANGE-R detect people?

Detection range is dependent on exterior (and interior) wall material type and thickness, however RANGE-R has a nominal range of 50 feet even when penetrating concrete walls up to one foot thick.

How thick a wall will RANGE-R penetrate?

RANGE-R easily penetrates most common, building materials, including concrete, wood, brick, glass, adobe, etc., with thickness of up to 12 inches. RANGE-R will not penetrate metal walls or doors.

How large an area does RANGE-R cover?

RANGE-R detects moving targets within a 160 degree cone out to a distance of 50 feet. This enables an entire room to be covered in a single scan. The cone extends +/ 80 degrees in both the horizontal and vertical axis.

How does RANGE-R work?

RANGE-R operates as a Doppler radar. It transmits RF energy through a wall and monitors the reflected energy to detect motion. RANGE-R detects motion on the other side of a wall in a manner similar to the way a traffic speed gun monitors the speed of a moving vehicle.

Will RANGE-R detect a non-moving person?

Yes. RANGE-R is sensitive enough to detect motion caused by a person’s breathing, making it extremely difficult for someone to “hide” from RANGE-R by trying to remain still.

Will RANGE-R detect more than one person?

RANGE-R will detect multiple targets but currently only displays the range to the target with the strongest RF return signal. Occasionally, an operator may see the display flash back and forth between two ranges, which can be an indication of more than one target in a room. This is not a reliable indicator however, and should only be considered in an advisory capacity.

Does RANGE-R show an image of the person?

No. To keep operation simple and maintain the unit’s small size and light weight, RANGE-R only displays range to the target, in feet.

Will RANGE-R go through metal surfaces?

No. The RANGE-R signal is a radio frequency, therefore it will not penetrate metal surfaces, regardless of thickness.

Will RANGE-R detect animals?

Yes. RANGE-R can detect motion from most domestic animals, like household pets. Due to their small radar cross-section and weak signal returns, smaller animals and insects are generally not detected.

Does RANGE-R detect moving objects such as fans?

RANGE-R has built in capability to reject synchronous periodic motion such as fan rotation. However, occasionally motion from an “unbalanced” source (like a wobbling ceiling fan or blowing curtains by an open window) can trigger detection.

Will RANGE-R detect an injured or sleeping person who is not moving?

Yes. RANGE-R is sensitive enough to detect motion caused by a person’s breathing. Therefore if the person is alive, RANGE-R should detect them.

Will RANGE-R penetrate more than one wall?

Yes. RANGE-R’s high sensitivity will detect people movement through multiple walls. This is, especially true for interior drywall. Since range to the target is displayed, an operator with some knowledge of the building structure can often determine whether a person is in a back room or a front room.

Can RANGE-R operate in a stand-off mode, without holding it against a wall?

While RANGE-R will often work successfully in a standoff mode, small movement of the operator’s hand during operation can be misinterpreted as movement by false targets inside the FOV. Therefore, it is strongly recommended that RANGE-R only be operated by holding it firmly against a wall, window, floor or ceiling while scanning.

If the information provided here did not answer your question or resolve your problem please contact RANGE-R Technical Support at 407-517-6167 or email RANGE-R.techsupport@L-3com.com. Tech support is available 24 hours a day, 7 days a week.