Use of Gravity SEN0290 Lightning Detector inside metal shed

Hi,

I'm planning to use the SEN0290 lightning detector as part of an antenna disconnect system. The most convenient location would be inside a large metal shed. Whilst I'm aware there is config for indoor and outdoor operation, I'm concerned that the metal shed may act as an effective Faraday cage and significantly limit the sensitivity of the detector. I'm wondering if there is any advice that may be of use to me or if anyone has experience using this device in a similar circumstance.

Cheers Steve