P-Trak (model 8525)

Manufacturer: TSI Incorporated
Part Number: 8525
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The TSI's P-TRAK® Ultrafine Particle Counter (UPC) 8525 is an ideal instrument measuring workplace ultrafine particulate levels, as well as helping eliminate indoor air quality (IAQ) problems. This portable instrument detects and counts ultrafine particles (smaller than 1 micrometer) that often accompany or signal the presence of a pollutant that is the root cause of complaints.

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 UPC 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.

Features and Benefits

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

Concentration Range

  • 0 to 5 × 105 particles/cm3

Particle Size Range

  • 0.02 to 1 micrometer

Temperature Range

  • Operation: 32 to 100° F (0 to 38° C)
  • Storage: 40 to 160° F (-40 to 70° C)

Flow Rate

  • Sample 100 cm3/min
  • Total 700 cm3/min (nominal)

Power Requirement

  • Battery type: 6 AA alkaline
  • Battery life: 6 hrs at 70° F (21° C)

Alcohol Requirement

  • Type 100% reagent grade isopropyl

Hours per charge

  • 8 hours at 70° F (21° C)

RS232 Output

  • Baud rate 9600


  • Single points 470

Data logging

  • 1,000 hours at one-minute intervals


  • 10.75 in. × 5.5 in. × 5.5 in. (27 cm × 14 cm × 14 cm)


  • Instrument with batteries 3.8 lbs (1.7 kg)

Factory Recalibration Interval

  • One year


  • Two years on parts and labor

Computer Requirements

  • PC with Microsoft Windows® 2000 or XP
  • Windows-compatible printer
  • 5 MB hard disk space
  • Available RS232 serial port (for downloading)
1 The P-TRAK will operate with an AC adapter for long periods but the alcohol wick must be resaturated every 8 hours when operating over an extended time

2 Warranty repairs returned via overnight carrier at TSI expense

Specifications are subject to change without notice

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