Supply nozzle for sensing dust, has combination of optical dust sensor and piezoelectric sensor, and evaluation circuit that processes sensor signals, where optical dust sensor is flow-moderately connected upstream of piezoelectric sensor

摘要

The nozzle has a combination of an optical dust sensor and a piezoelectric sensor (2), and an evaluation circuit that processes sensor signals. The optical dust sensor is flow-moderately connected upstream of the piezoelectric sensor. The optical dust sensor and the piezoelectric sensor are arranged together in close vicinity. The piezoelectric sensor angularly protrudes into the interior of a pipe-shaped connecting part (11).