CPA 341 Cleanroom Particle Analyzer
Portable or stationary single-particle light-scattering counter for low-concentration aerosols in gaseous samples — covering 0.3 to 10 µm at a fixed sampling flow of 28.3 L/min for cleanroom qualification, acceptance testing and filter measurements.
Model Overview
| Model | Measurement principle | Core specification | Core fit |
|---|---|---|---|
| CPA 341 | Single-particle 90° light-scattering counter with internal flow generation | 0.3–10 µm, five fixed size classes and 28.3 L/min sample flow | Cleanroom qualification, acceptance measurements, filter-integrity support and fractional-efficiency testing |
Key Features
Stable 28.3 L/min sampling
An internal side-channel blower maintains a 28.3 L/min (1 cfm) sampling flow, supporting both mobile measurements and stationary monitoring of low-concentration aerosols.
Five fixed particle-size classes
The optical counter measures particles from 0.3 to 10 µm in five preset size classes, providing particle-number and size information for cleanroom and filter-test workflows.
Programmable cleanroom workflows
Up to 999 measurement programs can store measurement and pause times, measurement positions, cycle counts and cleanroom-class alarm settings for repeatable qualification routines.
Touchscreen, alarms and data handling
The glove-operable touchscreen supports single, repeat and continuous measurement modes. Results can be displayed and printed, transferred through Ethernet and processed with CRQWin software.
Technical Specifications
| Parameter | Unit | Value / Description |
|---|---|---|
| MEASUREMENT SYSTEM | ||
| Measurement principle | — | Single-particle light scattering with 90° collection optics |
| Particle-size range | µm | 0.3 – 10 |
| Number of size classes | — | 5, fixed |
| Sample flow | L/min | 28.3 (1 cfm) |
| Flow generation | — | Internal side-channel blower |
| Zero-count rate | counts | < 1 count per 5 minutes, evaluated according to ISO 21501-4 |
| Counting efficiency | % | 50% ± 20% at 0.3 µm, evaluated according to ISO 21501-4 |
| OPERATION AND DATA | ||
| Display and control | — | Touchscreen |
| Stored measurement programs | — | Up to 999 |
| Measurement modes | — | Single, repeat and continuous measurement |
| Measurement / pause time | — | 1 second to 99 hours |
| Alarm | — | Configurable for each cleanroom class |
| Interface | — | Ethernet |
| Result handling | — | Tabular display, thermal-printer output and CRQWin processing |
| Inlet connection | mm | Ø 8 |
| PHYSICAL AND ELECTRICAL | ||
| Power supply | — | 100 – 240 V AC, 50/60 Hz |
| Dimensions (W × H × D) | mm | 225 × 255 × 220 |
| Weight | kg | 4 |
Specifications are based on the manufacturer data sheet dated March 2026. Confirm the final delivery scope, accessories and calibration documentation before ordering.
Used in these solutions
Applications
Classification and validation
Particle-concentration measurements for cleanroom qualification and validation according to ISO 14644-1/-3, GMP Annex 1 and VDI 2083.
Cleanrooms and workbenches
Mobile acceptance measurements of cleanrooms, clean-air workbenches and ventilation systems with high cleanliness requirements.
Integrity and fractional efficiency
Upstream concentration measurement and downstream leak scanning in filter-integrity workflows, plus determination of fractional separation efficiency for filters and separators.
