SYS 520 Sample Switching Unit
Automated switching unit for reproducible sampling from two locations—typically upstream and downstream of a filter—plus an integrated HEPA-filtered purge line using a single particle analyser.
Model Overview
| Model | Group | Positioning | Core fit |
|---|---|---|---|
| SYS 520 | Automated sample switching unit | Two sampling lines plus HEPA-filtered purge for one particle analyser | Upstream/downstream filter efficiency and two-point aerosol comparison |
Key Features
Two-location aerosol sampling
The unit switches between two sample lines, enabling sequential upstream and downstream aerosol measurements.
Integrated purge routine
A third line with an integrated HEPA filter supports purging between sample positions.
Single-instrument efficiency testing
Fractional separation efficiency can be determined economically with one particle-size analyser instead of separate upstream and downstream instruments.
Automated and repeatable switching
Controlled line selection improves repeatability compared with manual hose changes.
Instrument protection
Temporal limitation of sample exposure can help protect the particle analyser from excessive particle loading.
Remote sampling support
The switching arrangement supports sampling at measurement points that are difficult to access directly.
Technical Specifications
| Parameter | Unit | Value / Description |
|---|---|---|
| SAMPLING | ||
| Purpose | — | Aerosol sampling from two positions |
| Outlet condition | — | Aerosol from position 1, position 2 or purge line |
| Sampling hose | — | Tygon silicone, Ø 4.7 × Ø 3.4 mm |
| Purge hose | — | PVC, Ø 6.0 × Ø 4.0 mm |
| ELECTRICAL & INTERFACE | ||
| Power supply | — | 24 V DC via power adapter |
| Communication | — | 3-pin interface for LAP 32X |
| PHYSICAL | ||
| Dimensions | mm | 160 × 210 × 130 |
| Weight | kg | 1.9 |
Specifications are based on Topas GmbH published product information. Confirm the current configuration, accessories and calibration scope before order placement.
Applications
Fractional efficiency measurement
Alternating upstream and downstream aerosol sampling for determination of filter or filter-media separation efficiency.
Two-point comparison
Sequential analysis of aerosols at two locations using one particle-size analyser.
Difficult-to-access points
Controlled sample-line switching where direct instrument placement is impractical.
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