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Nanoparticle Emission Tester Model 3795

SKU: 3795

The TSI Nanoparticle Emission Tester (NPET) Model 3795 is a portable, easy to use and cost effective instrument. It is designed to measure total solid (non-volatile) particle number concentration from combustion sources, such as diesel exhaust or stoves. Featuring a robust and user-friendly design, the NPET can be used by researchers, regulatory inspectors, and maintenance personnel alike.

Product Details

The NPET 3795 helps you bring laboratory-grade particle counting to your worksite. The NPET features a sampling nozzle compatible with tailpipes, built-in 10:1 dilution, and a catalytic stripper to remove volatile particles. The instrument also has Ethernet connectivity, which enables data collection via a handheld tablet or laptop computer. Data can be collected in Official Measurement mode—which follows protocol for Swiss regulation SR 941.242—or in General mode, which allows customized measurements. Common applications include measuring particle emissions from non-road mobile machinery, stationary generators, and in-use buses.


The Nanoparticle Emission Tester is suitable for a variety of applications, including:

Features and benefits

  • Sampling probe with integrated dilution
  • Water removal via water trap and silica desiccant dryer
  • Built-in catalytic stripper for volatile particle removal
  • Wide environmental operating range  
    • -10°C to 40°C
    • 0 - 3,000 m
  • Concentrations up to 5,000,000 particles/cm3
  • Two measurement modes:    
    • General: Real-time data logging
    • Official: Swiss Regulation SR 941.242 certification