3
Siemens
A6V11893002_en--_c
Smart Infrastructure
2021-07-05
Functions
The duct sensor acquires PM2.5 & PM10 concentrations. The output value is the moving av-
erage of latest sensor data within 10 s.
The duct sensor acquires the relative humidity in the air duct via its capacitive humidity sens-
ing element whose electrical capacitance changes as a function of relative humidity.
The electronic measuring circuit converts the sensor’s signal to a continuous DC 0...10 V or
DC 0...5 V or 4...20 mA signal, corresponding to a relative humidity range of 0...100 %.
The duct sensor acquires the temperature in the air duct via its sensing element whose elec-
trical character changes as a function of the temperature.
The change is converted to an active DC 0...10 V or DC 0...5 V or 4...20 mA output signal
( 0...50 °C or -35...+35 °C).
Mechanical design
The fine dust duct sensor consists of a housing, a printed circuit board, connection terminals,
a mounting flange, and an immersion rod. The immersion rod of the QSM2162 has a meas-
uring tip.
The bisectional housing consists of a base and a removable cover (snap-on design). The
measuring circuit and the setting elements are located on the printed circuit board inside the
cover, the connection terminals are located on the base.
The humidity and temperature sensing elements are located at the end of the measuring
probe and are protected by a filter cap.
Cable entry is made via the cable entry gland M16 (IP54) supplied with the sensor, to be
screwed into the housing.
Immersion rod and housing are made of plastic and are rigidly connected.
The sensor is fitted with the mounting flange supplied with the sensor. The flange must be
placed over the immersion rod and then secured as per the required immersion depth.
The setting elements are located inside the cover.
PM2.5 and PM10 have same DIP switch settings.
Note
Fine dust (PM2.5
& PM10)
Relative humidity
(QSM2162)
Temperature
(QSM2162)
Setting element
