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The PowderPro A1 is a modern measuring device equipped with WiFi control and automatic image analysis, among other features, for the comprehensive characterization of powders in terms of essential macroscopic properties that particularly influence the conveyability, storage, and further processing of these materials.
The total of 14 parameters (see also ASTM D6393) that can be determined with the system are summarized in the following table:
| Parameter | Description |
| Measured parameter | |
| Sieve size | Grain size distribution by dry screening (automatic knock screening) with a maximum of 9 screens (45–2000 µm) |
| Angle of repose | Angle formed by a stationary powder cone and the horizontal plane |
| Angle of fall/ Angle of Collapse | Angle formed by a stationary powder cone and the horizontal plane |
| Angle of Spatula/ Flat-Plate Angle | Angle of inclination at which powder begins to slide on an inclined plate or spatula |
| Bulk Density | Density of a mixture of a powdery or granular material and a medium (usually air) that fills the spaces between the bulk material particles |
| Tapped Density | Density of a filled powder that has been compacted by (usually defined) tapping or vibration |
| Dispersibility | Ability of a powder to disperse upon contact with a gas or liquid |
| Voidage | Proportion of the total volume occupied by air or empty space |
| Cohesion | Internal attractive forces between particles that can impair flowability |
| Calculated parameter | |
| Angle of Difference | Difference between angle of repose and angle of fall/angle of collapse |
| Compressibility | Measure of the change in bulk volume under mechanical action |
| Uniformity | Measure of the uniformity of particle size distribution |
| Flowability | The ease with which a powder flows under gravity |
| Floodability index | Tendency of a powder to swirl slightly or flow uncontrollably when being poured |
Norms
/1/ ASTM D6393-14 Standard Test Method for Bulk Solids Characterization by Carr Indices
/2/ EP7.0 07/2010:20934 Bulk density and tapped density of powders
/3/ ISO 3953 Metallic powders – Determination of tap density
/4/ USP32-NF27<616>
Technical articles
/1/ Particle World 19; p. 8 – 9; “Macroscopic powder characterization: fully automated analysis of physical powder properties”
Application Notes upon request
 Zirconia, Alumina |  Silica powder |
 Graphite-, carbon-powders |  Phosphates, basic chemical powders |
 Food powders (Flour, Milk) |
 Iron powder |  Metal composite powder |
 Tablet powder |  Collagen powder |
