TSI Model 9550 Portable Laser Particle Counter

Overview

The TSI Model 9550 Portable Laser Particle Counter is an ISO 21501-4–compliant optical particle counter engineered for high-fidelity airborne particulate monitoring in cleanroom validation, pharmaceutical manufacturing environments, and controlled laboratory settings. Utilizing a dual-wavelength (650 nm and 405 nm) laser diode scattering detection system, the instrument achieves stable, reproducible counting of particles ≥0.5 µm with minimal coincidence error at its nominal volumetric flow rate of 50 L/min. Its compact, battery-operated design enables rapid deployment across multiple sampling locations without reliance on fixed infrastructure—making it suitable for ISO 14644-1 classification surveys, routine environmental monitoring, and root-cause investigations during contamination events. The device operates on the principle of light scattering intensity threshold discrimination, where individual particles passing through the focused laser beam generate scattered photons proportional to their size; these signals are digitized, classified into six user-selectable size channels (e.g., 0.5, 0.7, 1.0, 2.0, 3.0, 5.0 µm), and logged with time-stamped metadata.

Key Features

• ISO 21501-4–certified optical detection architecture with NIST-traceable calibration using monodisperse Polystyrene Latex (PSL) spheres and TSI’s reference CPC and aerodynamic classifier systems
• Real-time, six-channel particle concentration output (particles/m³) with automatic pass/fail reporting against ISO 14644-1, EU GMP Annex 1, and FS-209E cleanliness classes
• Integrated data logging with internal memory supporting ≥8,000 sample records; timestamped with UTC synchronization capability
• Modular probe interface enabling simultaneous acquisition of air velocity, dry-bulb temperature, and relative humidity via optional TSI 9555-series ventilation probes
• Ruggedized enclosure rated IP54 for dust and splash resistance; operational range: 10–35 °C, 20–80% RH non-condensing
• USB-C and Bluetooth 5.0 connectivity for secure, encrypted data export and remote configuration via TrakPro™ Lite software

Sample Compatibility & Compliance

The Model 9550 is validated for use with ambient air, compressed gases (filtered to ≤0.01 µm), and HVAC-supplied cleanroom air streams. It meets the performance requirements of ISO 14644-1:2015 for airborne particle concentration measurement in cleanrooms and associated controlled environments. Its calibration protocol adheres to ISO 21501-4:2018 for light-scattering airborne particle counters, ensuring traceability to national standards through documented PSL sphere sizing and counting efficiency verification. For regulated industries, the instrument supports audit-ready data integrity practices: all measurements include operator ID, location tag, sampling duration, and environmental context (when probe-connected). When deployed as part of a validated environmental monitoring program, the 9550 satisfies FDA 21 CFR Part 11 requirements for electronic records and signatures when used with TrakPro™ Lite configured for ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available).

Software & Data Management

Data acquisition, analysis, and reporting are managed through TSI’s TrakPro™ Lite software—a validated application compliant with GLP and GMP documentation standards. The software enables automated generation of ISO-compliant reports including spatial mapping, trend analysis over time, and statistical process control (SPC) charts. All raw count data, event logs, and system diagnostics are stored in encrypted SQLite databases with immutable audit trails. Export formats include CSV, PDF, and XML for integration into enterprise LIMS or MES platforms. Firmware updates are digitally signed and delivered via secure HTTPS channels to maintain cryptographic integrity and regulatory compliance.

Applications

• Cleanroom qualification and periodic requalification per ISO 14644-1 and EU GMP Annex 1
• Pharmaceutical aseptic processing line monitoring and isolator leak testing
• HEPA/ULPA filter integrity verification and airflow visualization support
• Biotechnology facility environmental baseline establishment and deviation investigation
• Microelectronics fabrication area contamination source identification
• Research-grade aerosol characterization in university and government laboratories

FAQ

What particle size resolution does the Model 9550 provide?
The instrument detects and classifies particles ≥0.5 µm with six user-defined size bins; default thresholds are 0.5, 0.7, 1.0, 2.0, 3.0, and 5.0 µm.
Is the 9550 compatible with continuous monitoring systems?
Yes—it integrates seamlessly with TSI’s FMS5 Facility Monitoring System for centralized data aggregation, alarm management, and long-term trending across multiple sensor nodes.
How is calibration traceability maintained?
Each unit ships with a Certificate of Calibration referencing NIST-traceable PSL standards and includes documented verification of counting efficiency, size resolution, and false count rate per ISO 21501-4.
Does the device meet FDA 21 CFR Part 11 requirements?
When operated with TrakPro™ Lite v4.2+ and appropriate administrative controls (e.g., role-based access, electronic signatures), the system supports Part 11 compliance for electronic records and signatures.
What is the standard warranty period?
TSI provides a two-year limited warranty covering parts and labor for defects in materials and workmanship under normal use conditions.