testo DiSCmini - Handheld nanoparticle counter

Order-Nr.  133

  • Simultaneous measurement and display of particle number concentration, average particle diameter, and LDSA, with a refresh rate of 1 second

  • No need for any working fluid or materials to operate

  • Vibration resistant, and can be operated in any position

  • Battery operation and charger allow for long term measurements

The testo DiSCmini is a portable nanoparticle analyzer that counts particle number, average particle size, and lung deposited surface area (LDSA) measurement values.

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Product Description

Use the testo DiSCmini to monitor personal exposure to ultrafine particles (UFP) in work areas, or to monitor ambient toxic pollutants such as diesel soot. This will provide data to allow you to evaluate health risks.
  • Handheld nanoparticle counter for measuring the number and average diameter of nanoparticles, with a fast resolution (refresh rate) of 1 second (1 Hz)
  • Simultaneous recording of particle number concentration and particle size enables the determination of other characteristic parameters, such as particle surface area (lung deposited surface area, LDSA)
  • Save data on a memory card, and transfer it to an external computer via USB
  • No operating materials, such as working fluid or radioactive sources, are needed – the testo DiSCmini can be operated over extended periods in any position, and with no need to replenish working fluids
  • Vibration resistant, and can be operated in any position
  • Battery operation of 8 hours, and/or AC power supply for long term measurements
The testo DiSCmini handheld particle counter measures the number and average diameter of nanoparticles efficiently, based on the electrical charging of aerosols. For example, with the testo DiSCmini, you can reliably monitor human exposure to ambient particles such as diesel soot, welding fumes, or industrial nanoparticles. The small size of the testo DiSCmini makes it ideal for mobile on-site measuring tasks.

Health risks due to nanoparticles

Previous studies describe the negative impacts of ultrafine particles on health, based on vague benchmarks. With the testo DiSCmini, it is now possible to measure the particle number concentration and average diameter of nanoparticles. Both are considered in determining health risk.

Typical applications

Typical applications of the testo DiSCmini include the determination of personal exposure in particle-loaded workplaces (due to diesel soot, welding fumes, and industrial nanoparticles, for example), or in vulnerable populations or groups (such as people with asthma, COPD, or other respiratory conditions).

The small size of the testo DiSCmini makes the instrument particularly suitable for mobile on-site measuring tasks and grid measurements of the ambient air. The high measurement frequency of 1 Hz for all three measurement parameters enables the detection of rapid changes in the aerosol.

Delivery Scope

testo DiSCmini handheld nanoparticle counter, including:
  • Transport case
  • Carry bag
  • SD card and SD card reader
  • Hose and connections to extend the sample inlet
  • AC battery charger
  • Power cord
  • Calibration sheet
  • Manual and quick start guide

Technical Data

General technical data

Operating humidity

< 90 %rH, non-condensing


24.7 oz. / 700 g


7.1 x 3.5 x 1.7 in. / 180 x 90 x 42.5 mm

Operating temperature

50° to 86 °F / +10 to +30 °C

Battery life

Typically 8 hours with a fully charged battery, depending on ambient temperature

Power supply

Mains unit, 100-120 Volt or 200-240 Volt, 50/60 Hz for charging the batteries

Operating air pressure

12 to 16 psi absolute / 800 to 1100 mbar absolute

±0 psi (Delta p max. on the air inlet) / ±20 mbar (Delta p max. on the air inlet)

Nano Particle

Particle size

10 to 300 nm (Modal value)

10 to 700 nm (absolute)

Particle concentration

1000 to 1000000 Particle/cm³ (typical values)

The evaluated particle concentration depends on the particle size distribution and the mean measurement time.


±30 % typical for size and number

±100 Particle/cm³ absolute in number