TSI P-TRAK 8525 Handheld Condensation Particle Counter

Overview

The TSI P-TRAK 8525 is a portable, battery-powered condensation particle counter (CPC) engineered for real-time, quantitative measurement of airborne ultrafine particles (UFPs) in the size range of 20 nm to 1 µm. Unlike optical particle counters limited by diffraction constraints, the P-TRAK 8525 employs butanol-based condensation nucleation to grow sub-visibility nanoparticles into optically detectable droplets, enabling high-sensitivity single-particle counting. This principle—rooted in classical aerosol science—ensures robust performance in field environments where rapid source identification and spatial mapping of UFP emissions are critical. Designed for industrial hygiene professionals, indoor air quality (IAQ) consultants, and facility engineers, the instrument delivers immediate feedback on particle number concentration (particles/cm³), supporting root-cause analysis of contamination events without laboratory turnaround.

Key Features

• True handheld form factor with integrated rechargeable lithium-ion battery, enabling >8 hours of continuous operation per charge
• Sub-20 nm detection capability validated against NIST-traceable reference aerosols; nominal lower detection limit of 20 nm at 50% counting efficiency
• Real-time response time of less than 1 second, facilitating dynamic scanning of HVAC ducts, equipment enclosures, and building envelopes
• Onboard data logging with timestamped records (up to 4,000 entries), exportable via USB interface in CSV format
• Ruggedized housing rated IP54 for dust and splash resistance, suitable for both indoor and semi-outdoor deployment
• No external sheath air or compressed gas required—fully self-contained operation minimizes setup complexity and field dependencies

Sample Compatibility & Compliance

The P-TRAK 8525 is optimized for ambient and workplace air sampling under non-saturated conditions (RH < 90%, non-condensing). It is insensitive to particle composition (e.g., elemental carbon, metallic oxides, organic condensates) due to its universal condensation mechanism. The instrument complies with the methodological requirements of GBZ/T 192.6–2018 for ultrafine and fine particle number concentration assessment in occupational environments. While not certified to ISO 29463 or EN 1822 for filter testing, its counting performance aligns with good practice guidelines for UFP source apportionment as referenced in ACGIH® TLV® documentation and ASHRAE Standard 62.1 Annex B. It supports GLP-aligned workflows through audit-ready data export and operator-defined annotation fields.

Software & Data Management

Data acquisition and post-processing are supported via TSI’s TrakPro™ Lite software (Windows-compatible), which enables time-series visualization, geotagging (when used with optional GPS module), and comparative overlay of multiple survey runs. All logged data include instrument serial number, calibration date, flow rate verification status, and user-entered location tags—supporting traceability per ISO/IEC 17025 documentation requirements. Raw count data retain native resolution without interpolation or smoothing, preserving statistical fidelity for Poisson-distributed low-concentration measurements. Firmware updates are delivered via signed binary packages to maintain integrity under FDA 21 CFR Part 11 considerations for regulated environments.

Applications

• Identification and localization of UFP emission sources—including combustion appliances (boilers, generators), office equipment (laser printers, photocopiers), and process machinery (welding stations, CNC coolant mist)
• Verification of HVAC filtration efficiency and duct leakage using tracer-based particle decay analysis
• Occupational exposure assessment during nanomaterial handling, thermal spray operations, and semiconductor fabrication maintenance
• Post-remediation validation following mold abatement or fire damage restoration, where UFP persistence indicates incomplete cleanup
• Baseline IAQ characterization in schools, hospitals, and high-occupancy commercial buildings per ASHRAE Guideline 44P

FAQ

What particle size range does the P-TRAK 8525 measure?
It detects particles from 20 nm to 1 µm in aerodynamic diameter, with peak counting efficiency between 30–100 nm.
Does it require external calibration gases or aerosol standards?
No—factory calibration uses NIST-traceable polydisperse latex spheres and is verified annually per TSI Service Bulletin SB-8525-01.
Can it be used outdoors in high-humidity conditions?
Operation is permitted up to 90% RH at non-condensing temperatures; prolonged exposure above 85% RH may reduce butanol saturation stability.
How is data integrity ensured during field surveys?
Each record includes embedded metadata: UTC timestamp, internal temperature/humidity, flow sensor output, and battery voltage—enabling full metrological traceability.
Is the P-TRAK 8525 compliant with OSHA or NIOSH measurement protocols?
While not a designated NIOSH-approved method, its performance meets the technical criteria outlined in NIOSH Manual of Analytical Methods (NMAM) Chapter 5000 for nanoparticle number concentration assessment.