Method and device for measuring NO_xconcentration using measurements of NO_xand a second gas component

摘要

A method for determining an NOx concentration in a measurement gas is provided, where a measurement value for the NOx concentration is determined from the sensor signal of a gas sensor and a measurement value for the concentration of a second component in the measurement gas is determined. A corrected value for the NOx in the measurement gas is determined from the measurement values, and the measurement value and the corrected measurement value for the NOx concentration are displayed and/or output.

主权项

1. Method for determining a NOx concentration in a measurement gas, comprising:
providing a sensor signal from a first gas sensor that is sensitive for NOx and that is brought into contact with the measurement gas and determining a measurement value for the NOx concentration from the sensor signal, determining a measurement value for a concentration of a second component in the measurement gas from a second gas sensor, the second component being oxygen, determining a numerical value for the NOx concentration in the measurement gas from the measurement value for the oxygen concentration in the measurement gas, and displaying the measurement value and the numerical value for the NOx concentration in the measurement gas, wherein the measurement value for the NOx concentration in the measurement gas is determined with reference to a stored first characteristic line from the sensor signal of the first gas sensor, wherein the numerical value for the NOx concentration in the measurement gas is determined with reference to a stored second characteristic line from the sensor signal of at least one of the first or the second gas sensor.