PACCAR Inc
Handheld testing device of nitrogen oxide sensor

Abstract:

A testing device is capable of testing a NOx sensor in an environment that does not have dew point detection capability. The testing device includes a connector configured to be coupled to the NOx sensor, an output indicator, and circuitry. The circuitry is configured to send an unverified dew point signal to the NOx sensor via the connector and receive a sensor signal from the NOx sensor via the connector. The unverified dew point signal includes an indication that a temperature of the environment is at or above the dew point. The sensor signal includes an indication of operation of the NOx sensor in the environment. The circuitry is further configured to determine a status of the NOx sensor based on the received sensor signal and indicate, via the output indicator, the status of the NOx sensor.