Scientific instruments and apparatus for scientific research, namely scientific measuring apparatus in the nature of sensors, position sensors, sensors for monitoring patient variables, namely, EEG (electroencephalogram), MEG (magnetoencephalogram), CT (computer tomography), EOG (electrooculogram), EMG (electromyogram), SaO2 (oxygen saturation), CO2 (carbon dioxide), nasal air-flow, body movement, leg movement, thoracic and abdominal respiratory movement, heart rate, body temperature, rectal ...