Using LC Bandpass Filter Before E-Field Meter to Measure Specific Frequency Intensity

Will adding LC bandpass filter before E-field meter measure the intensity of that particular frequency?

 

 

what is yours question

I am trying to figure out the E-field intensity (or electromagnetic field) at particular frequency of 5 kHz, 50 kHz, and 250 kHz.

But I cannot figure out how to isolate those particular frequencies before measuring the intensity.

The tools I see on the internet measures the strength of EMI but does not specify what frequency they are talking about. (Such as TriField XE100 Meter)

I may be wrong but it seems like they use an Inductor to measure induction caused by flux from electromagnetic field and feed it through an amplifier.

Again, I do not have a full understanding on this issue, but putting a bandpass filter before an inductor will not isolate the frequency in a way they get induced.

This is quite beyond me but how could I possibly measure EMI on those frequency?

Have you tried using an spectrum analyzer?