Inside the olfactometer (IMAGE) Stockholm University Caption Servo motors (1–4) and stepless valves (a). A diagrammatic illustration of the functionality of the olfactory display and the control of its airflow (b). Credit SCI LAB Usage Restrictions May be used in connection to the related research, License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.