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Speed Camera Detector Buyer's Guide |
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Radar speed camera detectors

Radar speed camera detectors warn drivers when they are approaching Radar
based speed
cameras. Radar usage in
the UK is generally limited to roadside Gatso speed cameras, handheld
devices and mobile
speed traps such as Mini Gatso. How does a Radar speed
camera work?
Gatso speed cameras and Radar
guns operate by emitting a radio signal at a set frequency (e.g. K Band) which is then
reflected by the target vehicle. The reflected signal's frequency is
shifted in direct proportion to the vehicles speed and this shift is
used by the Radar equipment to calculate the vehicles exact speed.
How does a Radar Detector detect Radar?
A radar signal is conical in
shape much like a torch beam. At 200yards, the normal operation range of
a radar gun, the signal is a wide as a dual carriageway. Most of the
signal therefore, goes past the target and on up the road - reflecting
off trees and houses etc eventually becoming 'radar scatter'. Radar
detectors are extremely sensitive radio receivers tuned to these
frequencies and can detect very small particles of 'radar scatter' at up
to two miles.
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Laser speed camera detectors
Laser speed camera detectors warn drivers when they are approaching
Laser based speed cameras. Laser usage in
the UK is generally limited to mobile handheld devices, that the Police
use on the roadside or from bridges. In 2007 Arrive Alive speed cameras in
north Wales caught 55,704 offenders. Another 5,610 were caught by officers
with hand-held laser devices.
How does a Laser speed camera work?
A Laser speed camera emits a narrow, focussed Laser beam consisting of a
series of pulses which are reflected back from the target vehicle. The
times for these pulses to return are measured and from these the speed
of vehicle can be calculated.
How does a Laser Detector detect Laser?
Because the Laser beam is so narrow, it allows the traffic officer to target
a specific part of the vehicle, from a long range a Laser detector will
detect a Laser gun from most locations within the vehicle. But from close
range specific parts of the vehicle may be targeted i.e. number plate.
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Are Radar and Laser Detectors Legal?
It is currently
100% legal (February 2008) to use a Radar or Laser speed camera detector
in the UK to warn of all speed camera locations - fixed and mobile.
Legality of radar and laser systems are under review.
For further
information please visit our Speed Camera Detector Legal page
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