Problem with filtering noise

[GeoAVR]

Hi all,

I have a sensor with a Bandwidth of 10Hz to 50kHz.
I have observed that sometimes I get noise spikes at 20Hz and 60Hz. I believe it is because of the long wire of the sensor and the noisy (industrial) environment.

At first I though of using a high pass or notch filter to remove the spikes but the problem is that at the noise frequencies are also signal frequencies.

What can I do?

Thank you in advance.

 

[FvM]

Improve the wiring, use differential signaling, add preamplifier to the sensor.

 

[Audioguru]

A shielded audio cable will prevent the long wire from acting like an antenna for the noise.