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That dakota one sounds like what i am looking fer. Id really hate to wake up the family at 4 am or earlier depending on when i have to leave.
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The Dakota products are about the best to be had on the market today. Of course, you are paying 2X-3X the price of products that occupy the tier below them.
I have had the same problem with the heat sensors on vehicles that are not warmed up. The same limitations apply when the weather is very cold or very hot. In addition, if the sensor is placed in such a manner it receives direct sunlight in the lens early AM or late PM it will miss some vehicles. One thing that has worked for me re: temperature problems is to aim the sensor toward the exhaust portion of the vehicle which seems to produce a greater heat gradient than a frontal or side shot.
Best option is to place the sensor in close proximity to the travel lane. Pinch points like gates are optimum. The sensor has an LED light that activates when the sensor is triggered. It can be disabled via a DIP switch in the sensor.
An advisory note....... The Dakota warranty AND their customer service is decent. Make SURE and keep purchase receipts as they do not cut ANY slack on the warranty period.