Radar detectors are designed to give the driver a proximity or distance to the radar source. This is signal strength or the Geiger Effect. It means the closer you get to a radar gun the higher the signal strength and more immediate the warning. All detectors have different signal strengths either by a series of lights or numbers with accompanying sound of alert.

Police use radar at a very close range, usually less than 1,000 feet. They are taught this as they must be able to visually identify a suspect vehicle in a group. This is called a Valid Visual Tracking History as required by the courts. In a recent Ohio Supreme Court Case, 126 Ohio St. 3d 5, 2010-Ohio-2420, decided June 2010, Barberton v. Jenny, the court ruled the officer’s visual history is enough to issue a speeding ticket even without a radar or laser reading. However they must be experienced in visual estimation. Officers are trained to estimate the speed of a vehicle and then use a radar / laser speed reading to substantiate the infraction. Ohio’s new law is effective 1 September 2011 allows radar/laser use.

The Results: 4/7 means the detector’s signal strength recorded a signal of 4 or 7. Y means detected band.

1½ miles

X band K band Ka band Detector

Y 2/6, Y 2/6 Y 6/6, Y 4/6 Y 3/6, Y 3/6 TPX Detector 2.0

Y 6/6, Y 6/6 Y 5/6, Y 5/6 Y 5/6, Y 5/6 Beltronics STi Magnum

Y 3/6, Y 4/6 Y 5/6, Y 5/6 Y 6/6, Y 5/6 Beltronics STi R Plus

Y 1/5, Y 1/5 Y 2/5, Y 2/5 Y 3/5, Y 3/5 Cobra XRS 9970G

Y 6/7, Y 6/7 Y 5/7, Y 6/7 Y 6/7, Y 6/7 Escort Redline

Y 3/7, Y 4/7 Y 7/7, Y 7/7 Y 6/6, Y 6/6 Passport 9500 iX

Y 5/7, Y 5/7 Y 7/7, Y 7/7 Y 6/6, Y 6/6 Passport 8500 ci Plus

Y 4/7, Y 4/7 Y 5/7, Y 6/7 Y 6/6, Y 6/6 Escort Solo S3

Y 3/9, Y 3/9 Y 5/9, Y 5/9 Y 9/9, Y 9/9 Whistler Pro 78 SE

Y 3/9, Y 3/9 Y 5/9, Y 5/9 Y 9/9, Y 9/9 Whistler XTR 690 SE

Y 3/9, Y 3/9 Y 5/9, Y 5/9 Y 9/9, Y 9/9 Whistler Pro 78 XRi

Y 5/8, Y 6/8 Y 8/8, Y 7/8 Y 8/8, Y 8/8 Valentine One

TPX Detector is from AdaptivTechnologies

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