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Revision 4
If it is necessary to measure concentrations that are higher than 200 mg/m
3
and having
linear behavior is critical, it is recommended to perform reference measurement at the
desired concentration and to add additional calibration points using DustTool software.
Particle material
Different materials can have different amounts of electrostatic charge. This means that the signals
transmitted by dust particles can vary significantly from one material to another:
•
Metals (inorganic, electroconductive) generate the lowest signals.
•
Cement and minerals (inorganic, dielectric) generate average signals.
•
Wood and flour (organic, dielectric) generate the highest signals.
As a result, different types of dust generate a different output signal at the same concentration.
Certain heavy metal dusts generate extremely low signals. For measuring such dusts,
the device must be tested with a dust sample before delivery.
Common dust particle materials include:
•
Grains
•
Sugar
•
Coal
•
Cosmetics
•
Dyes
•
Ceramics
•
Textiles
•
Wood and paper
•
Soap
•
Metals and metal oxides
•
Minerals
•
Ores
•
Cement
•
Plastics
•
Chemicals
Particle size
The minimum particle size that the device can detect is 0.3 µm. The optimal detection range is from 1 to
200 µm.
Relative humidity
The device is intended for use in non-condensing environments in both indoor and outdoor applications.
The relative humidity (RH) has an insignificant effect on the measurement results. However, the sensor
does not distinguish liquid droplets from dust particles. This means that the measured airflow must not
contain condensation. If the measured airflow contains condensed liquid droplets, it is possible that the
device does not produce output signal at all, or the output signal can be too high.
Ambient temperature
Ambient temperature only has a very minor effect on the output signal.
