comments:
Allison1228 posted on r/ufo1w
UFO detectors have been around for years; this one at least five years or so: https://www.amazon.com/UFO-Detector-magnetometer-interfaced-microcontroller/dp/B000796XYQ?crid=3574L5BTCXVD0&dib=eyJ2IjoiMSJ9.kYkzXRFyfUJ01Hkl9Q8VpB20c0QpVs6fbbd_MUjE1837x097v5VVd_vAG9hdXGVq_SLz9dbDpNOmnGcCyV0NGk4hecsE7Nffvg1WrO6wGALDOz_Z3qvkrjymxiOg9p-fqVNH3uIYI2n1hLtBpqmQoCMQ3ldra2NBXmgeHAv1KX88L_cPODpy6Cdo4OFGN9tKHNL4-3rYxb1KQTBlwxoZ_EK1ONKDpP7gK1oje8zg-6E.eStMh1XkW526prnYnPBVKKKXoyqqMtpMSWDalYQBqaY&dib_tag=se&keywords=ufo+detector&qid=1782091822&sprefix=ufo+detecto%2Caps%2C182&sr=8-3