MOISTURE EQUILIBRATION FOR POWDERS AND BULK SOLIDS – PROUMID
Dynamic Flow Method
A defined gas flow with controlled RH is passed through a powder bed. Temperature and RH at the gas inlet and outlet are recorded. The formation of lumps or air channels inside the powder bed is inhibited by continuous agitation. Completion of the humidity conditioning process is automatically determined by the instrument.
Humidity Control
The powder conditioner is connected to the ProUmid MHG32 Humidity Generator or comparable equipment that provides a humidity-controlled gas flow.
Applications for Moisture Equilibration
- Powder analysis
Pre-treatment of powders for analysis of bulk properties with a certain moisture content using equipment such as powder rheometer, flow tester, caking tester or ring shear cell.
- Processibility
of powders with a certain moisture content in processes such as tableting, roller compaction, filling and dosing.
Add-on: Water Content Determination
Water uptake of the powder can be calculated from the gas flow rate and the temperature and RH readings by a software algorithm. Successive execution of humidity steps enables to record the sorption isotherm of powdered material.
Technical Specifications
| Usable Volume | 200 ml |
| Dimensions Glass Cylinder | ∅50 mm, height 150 mm |
| Humidity Range* | 2% RH to 95% RH |
| Humidity Accuracy* | ±0,8% RH at 10 … 30 °C |
| Temperature Range** | 10°C to 60° |
| Selectable Flow Rate* | 0 … 500 ml/min |
| Water Supply | removable tank, 700 ml |
| Gas Supply* | compressed air/nitrogen 2 bar to 10 bar dry, clean, oil-free (class 1, ISO 8573-1:2010) |
| * in connection with the MHG32 humidity generator. ** when placed in a temperature-controlled environment. |
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