Interested in Language
Never consider equipment or experiment safeguarding above your own(?) safety.
Never consider equipment or experiment safeguarding over your own(?) safety.
I would re-order the phrase to place the most important point [your safety] first.
"Always prioritise your own safety above safeguarding your equipment or experiment", or, more simply, "Your safety is more important than your equipment or your experiment".
I'm not a teacher of English, but I have spoken it for (almost) all of my life....