Technician A says that a 2010 SCR system that only has one NOx sensor at the SCR catalyst outlet would likely use a virtual sensor for the SCR catalyst inlet NOx determination. Technician B says that a smart sensor and a virtual sensor are really the same thing. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

A virtual sensor can be used to estimate the NOx levels at the SCR catalyst inlet when only one physical sensor is present at the outlet. A smart sensor and a virtual sensor are not the same; a smart sensor has built-in processing capabilities, while a virtual sensor uses software algorithms to estimate values.

Technician a Says That a 2010 SCR System That Only