Schréder - Cyklostezky

PIR or radar?

When it comes to choosing a detection device, how do you choose between PIR and radar? It is a matter of flexibility and cost. Traditional motion sensors have been designed using PIR as it is a cost-effective and simple detection device . The PIR sensor detects changes in the amount of infrared radiation. A radar uses the Doppler principle to determine an object’s motion, speed and direction. So the required features will ultimately dictate the choice of technology. Is distance important? If so, take into account that PIR sensors have a detection range of roughly 5 metres. Radar can work within a range of 2 to over 30 metres. If the speed and direction of the moving object are key parameters, radar is the best solution as it can detect both characteristics.


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