PIR/microwave motion sensors

I got a Motion Sensor which is PIR and Microwave but it seems like it's on an AND gate (both PIR and microwave have to detect to alarm) since PIR can be easily defeated by an umbrella or other covering technique. What are your thoughts on defeating these motion sensors?

submitted by /u/GHOST2253
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from hacking: security in practice https://ift.tt/9hpkOH1

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