Gas sensor arrangement for measuring air moisture in gas in atmosphere, has indicator for indicating false function of arrangement based on deviation of measured values of non-dispersive infrared sensor and metal oxide gas sensor array

摘要

The arrangement (10) has a non-dispersive infrared (NDIR) sensor with a control device (18) for controlling an infrared (IR) light source (14) of the NDIR sensor. The control device provides a signal of an IR sensor unit (16) of the NDIR sensor, and a metal oxide gas sensor (MOX) array (22) detects comparison gas components e.g. air moisture, detectable by the NDIR sensor. The control device has an automatic unit (24) for comparing measured values of the sensor and the array, and an indicator indicates a false function of the arrangement based on the deviation of the measured values. An independent claim is also included for a method for testing functionality of a gas sensor arrangement.