A radar detector device functions by detecting radio waves from traffic control radar guns, and alerts the user upon detection. It detects electromagnetic emissions from a traffic control radar gun by using a super heterodyne receiver. Radar detector devices can detect false positives due to devices that operate in the same part of the electromagnetic spectrum as radar guns.
The most common radar detector devices
Automatic door openers used in most supermarkets are among the most common devices that trigger a false positive detection in radar detector devices. Recent radar detector models have various technological advantages, such as integrated GPS technology and support for various mobile phone brands. Certain radar detector manufacturers also offer iPhone and Android apps can be used with their radar detector models, allowing the user to plan out a route that avoids frequently used traffic control locations before the user even enters his car.
Radar detector features and technology
GPS support allows radar detector users to manually input the location where they last encountered a traffic control device. This can be considered an advantage when encountering LIDAR-equipped traffic control checkpoints, since most radar detector models do not detect LIDAR guns. Technological advancements have allowed the creation of radar detector detecting technology, but newer radar detector models have integrated countermeasures and operate on a different frequency, thus negating the threat of detection. Certain radar detector models can absorb or scramble radio waves emitted from a radar gun, and are legally considered as radar scramblers. Radar gun traffic control devices have an effective range of up to 300m, which also makes it the effective range a radar detector device will detect them. High-end radar detector models have the ability to detect newer traffic control devices that use LIDAR technology, along with existing radar gun technology. LIDAR-equipped traffic control devices and vehicles do not use radio waves, but instead use a relatively focused beam of light to detect the speed of a moving vehicle.
Most LIDAR devices have to be actively aimed at a moving vehicle to be effective, but have a much longer effective range(up to 910m) thanks to their focused beam. Radar detector devices that do not have integrated LIDAR detection capabilities are rendered practically useless due to the extended range of LIDAR traffic control devices.
Radar detector availability and legality
The usage of a radar detector or radar scrambler device is considered illegal in most countries, so check your country’s regulations before purchasing and using a radar detector or radar scrambler. Radar detector prices can vary from $25 to anywhere up to $400. Most countries’ regulations may allow the usage of radar detectors, but may have regulations in place that outright ban the usage of radar scramblers or laser detectors. Heavy fines may be applicable for the usage of radar detector devices and can vary from 95€ in Germany to up to 7700€ in the Czech Republic. Certain countries like Belgium can confiscate entire vehicles if the driver is using or even owns a radar detector device. While radar detector devices are very useful, extreme caution is advised before purchasing or using such a device.
