TSI AeroTrak 7110 Remote Laser Particle Counter

Overview

The TSI AeroTrak 7110 Remote Laser Particle Counter is an ISO 21501-4 compliant, high-flow online particle monitoring instrument engineered for precision, long-term stability, and seamless integration into centralized environmental surveillance systems. Utilizing a stabilized helium–neon (HeNe) laser light source operating at 632.8 nm, the 7110 achieves superior signal-to-noise ratio and enhanced detection sensitivity for particles as small as 0.100 µm (100 nm). Its optical design employs Mie scattering theory with optimized photodetector geometry and pulse-height analysis to ensure high reproducibility across all eight user-configurable size channels (e.g., 0.100, 0.150, 0.200, 0.300, 0.500, 1.0, 2.0, and 5.0 µm). Unlike portable or handheld counters, the 7110 is designed for permanent installation in cleanroom ceilings, HVAC ducts, or critical process lines—leveraging an external vacuum source to maintain consistent 28.3 L/min (1 CFM) volumetric flow under variable backpressure conditions. This architecture enables continuous, unattended operation while minimizing thermal drift and mechanical wear.

Key Features

• ISO 21501-4 certified optical calibration using NIST-traceable polystyrene latex (PSL) reference particles, verified through TSI’s proprietary aerosol sizing and condensation particle counter (CPC) validation protocol
• Stainless steel housing rated for Class 100 (ISO 5) cleanroom environments; IP65-rated front panel for dust and moisture resistance
• Dual communication architecture: Modbus TCP over Ethernet for SCADA-level integration and Modbus RTU over RS-485 for legacy building management systems (BMS)
• Pulse output mode supports direct connection to programmable logic controllers (PLCs) for real-time alarm triggering on exceedance events
• Onboard data logging stores up to 2,000 timestamped sample records with full channel distribution, flow rate, and status flags
• Remote sensor head configuration allows separation of optical chamber from electronics module—ideal for high-radiation, high-temperature, or confined-space installations
• Factory-calibrated flow sensor with automatic temperature and pressure compensation ensures volumetric accuracy across ambient variations (15–30°C, 80–106 kPa)

Sample Compatibility & Compliance

The AeroTrak 7110 is validated for use with ambient air, compressed gases (dry nitrogen, instrument air), and low-humidity process streams. It is not intended for sampling corrosive, condensing, or oil-laden aerosols without upstream conditioning (e.g., HEPA pre-filtration, desiccant drying). All measurements conform to ISO 21501-4:2018 (“Determination of particle size distribution — Single particle light interaction methods”), including requirements for counting efficiency, size resolution, false count rate, and coincidence error correction. The instrument supports audit-ready operation under FDA 21 CFR Part 11 when deployed with TSI’s FMS 5 Facility Monitoring System, which provides electronic signatures, role-based access control, and immutable audit trails for GLP/GMP-regulated facilities. Calibration certificates include uncertainty budgets per ISO/IEC 17025:2017.

Software & Data Management

While the 7110 operates autonomously with local display and status LEDs, its full analytical potential is realized when integrated with TSI’s FMS 5 software platform. FMS 5 provides real-time spatial mapping of particle concentration gradients, statistical process control (SPC) charting (X-bar/R, CUSUM), automated alert escalation via email/SNMP, and export to CSV, PDF, or SQL databases. All raw pulse-height histograms are retained for retrospective re-analysis. The system supports configurable alarm thresholds per channel and location, trend reporting against ISO 14644-1 classification limits, and compliance documentation packages for regulatory submissions (e.g., EU Annex 1, USP ). Firmware updates are delivered via secure HTTPS and validated using SHA-256 checksums.

Applications

• Cleanroom environmental monitoring in semiconductor fabrication, pharmaceutical aseptic processing, and medical device manufacturing
• Filter integrity testing (e.g., HEPA/ULPA qualification per ISO 14644-3 and IEST-RP-CC034)
• Real-time contamination event investigation in isolators, RABS, and gloveboxes
• Process gas purity verification in inert atmosphere chambers and vacuum deposition tools
• Validation and routine monitoring of HVAC supply/return air streams per ISO 14644-2
• Supporting ISO/IEC 17025 accredited laboratories requiring traceable, auditable particle data

FAQ

Does the AeroTrak 7110 require annual recalibration?
Yes—TSI recommends annual calibration using NIST-traceable PSL standards to maintain ISO 21501-4 compliance; calibration intervals may be extended under documented risk assessment per ISO/IEC 17025.
Can the 7110 operate without the FMS 5 software?
Yes—it functions as a standalone remote sensor with local data logging and Modbus output; FMS 5 is optional for advanced visualization, alarms, and compliance reporting.
What vacuum specifications are required for external pump compatibility?
A minimum of –50 kPa (gauge) suction pressure at 30 L/min flow is recommended; typical industrial vacuum systems (e.g., diaphragm or rotary vane pumps) meet this requirement.
Is the 7110 suitable for outdoor ambient air monitoring?
No—its optical chamber is not weatherproofed or temperature-compensated for uncontrolled outdoor environments; it is designed for conditioned indoor or ducted applications.
How is data integrity ensured during network interruptions?
All samples are buffered in non-volatile memory; upon network recovery, queued records are transmitted with original timestamps and sequence numbers to prevent data loss.