smoke test having perceivealbe that sampling probe was removed from exhaust pipe

摘要

The present invention relates to a smoke measuring device for measuring the pollution level of the exhaust gas emitted from the exhaust pipe of a passenger car, truck or motorcycle, in particular, a probe departure detection function that can immediately detect the departure of the probe inserted into the exhaust pipe to improve the measurement reliability It relates to a soot measuring instrument provided. The soot measuring device according to the present invention includes a flow tube having a tube shape having an inlet tube at the center thereof; A light emitting part formed at one side of the flow tube and having a light emitting hole installed therein and having an air blow hole and an outlet; A light receiving part formed on the other side of the flow tube, mounted with a lens and a sensor, and having an air blow hole and an outlet; A pressure sensor installed in the flow pipe or the inlet pipe to measure a pressure of the exhaust gas flowing; It is configured to include; an analyzer for measuring and analyzing the pollution and back pressure of the exhaust gas and outputs.