Active sensor Vs Passive Sensor

Start here. Then when you know the concepts come back with specific questions.

The possibility of homework seems high to me.

Perhaps you could explain why you want to know.

WikiAnswers - What is the difference between a passive sensor and

I was just reading one industrial instrument topic and face active and passive sensor words and it was not clear for me. So, I posted to know if someone knows or explain it more clearly for me.

Hello, Hameedullah Ekhlas,

Google is very good for finding your answers. I typed "passive sensor" and the dropdown showed "passive sensor definition" in the lowest row. I selected that and it gave many "hits". From one of them, I got this:

An active sensor sends out a signal and measures the response (e.g. radar), whereas a passive sensor measures only (e.g. light wavelengths).

It took me maybe 2 minutes. Not that we don't welcome being able to help, but I suggest you spend some time learning to use the various internet search engines. You can get answers much faster by doing so.

Mike