This photo shows the sterilisation effects of negative air ionization on a chamber aerosolised with Salmonella enteritidis. The left sample is untreated; the right, treated. Photo taken in a lab operated by the United States Department of Agriculture. An<unk>  (or negative ion generator or Chizhevsky's chandelier) is a device that uses high voltage to<unk> (electrically charge) air molecules. Negative ions, or anions, are particles with one or more extra electrons, conferring a net negative charge to the particle. Cations are positive ions missing one or more electrons, resulting in a net positive charge. Some commercial air purifiers are designed to generate negative ions. Another type of<unk>  is the electrostatic discharge (ESD)<unk>  (balanced ion generator) used to neutralise static charge. In 2002, in an obituary in The Independent newspaper, Cecil Alfred 'Coppy' Laws was credited with being the inventor of the domestic<unk> .
Air ioniser
Respirometer
Crusaid
Hug machine
Sweat diagnostics
Haidinger's brush
Mind machine
Air purifier