> is this thing emitting anything In the most pedantic sense, yes: electrons, magnetic fields, infrared light, etc. It's not designed to, nor is it likely to,

> is this thing emitting anything In the most pedantic sense, yes: electrons, magnetic fields, infrared light, etc. It's not designed to, nor is it likely to, emit any sort of ionizing radiation > simply a passive detector Yes, it is a passive detector > I’m mainly worried about any potential health risks You are bombarded with radiation constantly. If you've flown on a plane, you are exposed to several times ionizing radiation levels that you experience on the ground. If you've stepped outside and witnessed a lightning storm you have exposed yourself to high energy gamma rays and neutrons. If you've ever eaten a banana, spent the night in a strangers bed, strayed near clay river beds, entered a basement of a house, or stepped outside in sunlight you have exposed yourself to substantial increase of ionizing radiation compared to baseline. Humans brains have an extraordinarily hard team comprehending logarithmic scales. "Safe" radiation exposure isn't "None", as that's pretty much impossible. Your body has also long ago evolved to deal with these problems and can easily handle 100x times what occurs naturally at the ground without even a single health effect. If you want zero exposure, the only real option is to move to an undersea bubble thousands of feet below the sea, but even seawater contains radioactive ions from the metal salts dissolved in it.