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TSI 8525 P-Trak

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The P-Trak 8525 Ultrafine particle counter comes with everything you need to start solving tough IAQ problems. Designed to detect and count ultrafine particles smaller than 0.1 micrometer in diameter.

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Ultrafine particles are defined as having a diameter less than 0.1 μm (or 100 nm). Engineered nanoparticles (nanomaterials) are a subset of ultrafine particles with dimensions from 1 to 100 nm. Nanomaterials are produced and used for industrial and high-tech applications, while ultrafine particles are the byproducts of combustion and other chemical reactions. Unfortunately, the occupational health risks associated with manufacturing and using nanomaterials are not clearly understood. As a result, a need has arisen to assess workplace conditions. Using TSI’s proven technology, the P-Trak gives direct, real-time measurement of workplace ultrafine particulate levels.

The P-Trak also locates obvious pollutant sources such as boilers, furnaces, and vehicles, and it also detects the not-so-obvious sources such as photocopy machines and printers. Use this instrument to detect the migration of toxic exhaust gases, malfunctioning office equipment, pinhole gasket leaks in boilers and a wide variety of other problems.


  • Real-time ultrafine particle counter
  • Solves difficult IAQ problems
  • Easy to use
  • Data log information


  • Check office equipment
  • Cleanroom containment checks
  • Filter checks
  • Check fume hoods
  • Check safety cabinets
  • Vehicle emission migration
  • Combustion leaks


Concentration range      0 to 5 × 105 particles / cm3

Particle size range      0.02 to 1 micrometer

Temperature range      Operation 0 to + 38 °C, Storage - 40 to + 70 °C

Power requirement      Battery type 6 AA alkaline

Battery life      6 hours at 21 °C

Hours per charge      8 hours at 21 °C

Alcohol requirement      Type 100 % reagent grade isopropyl

Memory      Single points 470 Data logging 1,000 hours at one-minute intervals. A maximum of 141 separate tests.

Size      27 cm × 14 cm × 14 cm



TSI 8525 P-Trak data sheet

  • Technical Document
  • PDF file
  • 229 KB

TSI getting tha data you need application note

  • Technical Document
  • PDF file
  • 655 KB

TSI investigative methodology application note

  • Technical Document
  • PDF file
  • 247 KB

TSI P-Trak 8525 user manual

  • Technical Document
  • PDF file
  • 1 MB

TSI P-Trak theory of operation application note

  • Technical Document
  • PDF file
  • 228 KB

TSI TrakPro software user manual

  • Technical Document
  • PDF file
  • 2 MB



Are there any H&S regulations concerning ultrafine particles ?


No. All current regulations and guidelines specify airborne particulate levels in terms of mass (i.e. mg/m3), and there are rarely enough ultrafine particles in the air to measure in terms of mass.

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