Paramagnetism is a quality that allows oxygen molecules to become attracted by a magnetic field.
Few gases have such susceptibility, NO 2 being the only other gas that shows significant effect. Some electrochemical sensors can be 'poisoned' by, or mis-read oxygen content due to, the presence of other gases. Zirconia sensors cannot operate with potentially combustible components present in the sample due to the high operating temperature of the sensor. Connections at the rear of Paramax-101 include current and voltage outputs for connection to data collection systems or controllers. An optional RS-232 connection is available for direct connection to computers or controllers.