DDS 560 Dynamic Dilution System
Variable aerosol dilution system for reproducible concentration reduction at sample flow rates from 0.5 to 3.0 L/min, with continuously adjustable dilution and live flow-ratio display.
Model Overview
| Model | Configuration | Primary use | Selection note |
|---|---|---|---|
| DDS 560 | 5–370, flow-dependent; 0.5–3.0 L/min | Variable aerosol dilution system for reproducible concentration reduction at sample flow rates from 0 | Select DDS 560 when manual, continuously variable dilution is required for particle instruments with 0.5–3.0 L/min sample flow. |
Key Features
Continuously adjustable dilution
Allows the aerosol dilution factor to be varied over the published operating range rather than using one fixed dilution ratio.
Variable sample flow
Supports particle-measurement instruments with sample flow rates from 0.5 to 3.0 L/min.
Real-time flow and ratio monitoring
Measures the relevant volume flows and displays the calculated dilution ratio during operation.
Particle-size distribution retained
The capillary-and-filter bypass principle removes particles from the bypass stream while preserving the sampled aerosol distribution.
Self-contained flow arrangement
Does not require an external dilution-air supply or a separate exhaust-air flow for normal operation.
Broad analytical integration
Suitable for particle counters, filter-test benches, aerosol-generator verification and research measurements.
Technical Specifications
| Parameter | Unit | Value / Description |
|---|---|---|
| DILUTION PERFORMANCE | ||
| Purpose | — | Dilution of aerosols |
| Dilution-factor range | — | 5–370, depending on sample flow |
| Setting resolution | — | 1 |
| Setting method | — | Manual |
| Aerosol volumetric flow rate | L/min | 0.5–3.0, continuously variable |
| CONNECTIONS & OPERATING CONDITIONS | ||
| Power supply | — | 12 V DC, 300 mA via power adapter |
| Hose connector | mm | Ø 8 outer diameter |
| Capillary material | — | Brass |
| Maximum counterpressure | kPa | ±35 |
| PHYSICAL | ||
| Dimensions (W × H × D) | mm | 300 × 200 × 140 |
| Weight | kg | 2.9 |
Specifications follow the current Topas GmbH product information reviewed for this page. Confirm the final configuration, accessories and calibration documentation at quotation stage.
Applications
Cleanroom and laminar-flow validation
Dilutes high upstream aerosol concentrations to the operating range of particle counters used in cleanroom and clean-air-device testing.
HEPA and ULPA filter checks
Supports upstream and downstream particle measurements where a variable dilution factor is required.
Filter-media verification
Provides adjustable concentration conditioning for fractional-efficiency and filter-media studies.
Aerosol research
Enables controlled variation of particle concentration while retaining the aerosol size distribution.
Aerosol-generator verification
Supports evaluation of aerosol generators and powder dispersers across changing concentration levels.
Particle-instrument range matching
Conditions concentrated aerosols to the measurement range of downstream analytical instruments.
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