Which scientific equipment recall in the 1990s led to major changes in laboratory safety protocols after mercury contamination was discovered in thousands of research facilities?

Product recalls in scientific equipment can have far-reaching consequences for research integrity and laboratory safety. Some recalls have even changed the course of scientific progress or altered standard practices in laboratories worldwide. This poll tests your knowledge about one of the most significant scientific product recalls that transformed modern chemistry lab practices.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Fisher Scientific's mercury thermometers
Beckman Coulter's pH meters
Thermo Electron's spectrometers
Mettler Toledo's analytical balances