The Fast Mobility Particle Spectrometer (FMPS) is capable of producing real-time particle size distribution measurements with one-second time resolution. The instrument discriminates between 5.6 – 560 nm particle sizes to provide particle number concentration and can categorize this value into one of 32 size bins. This particle size measurement is based on differential electrical mobility classification. The particle number concentration is determined by measuring the electrical current collected on a series of electrodes.

The Engine Exhaust Particle Sizer (EEPS) spectrometer measures the size distribution of engine-exhaust particle emissions in the range from 5.6 to 560 nm at 10 samples per second. The instrument can capture the dynamic behavior of particle emissions that occur at the various conditions. The EEPS and FMPS instruments operate on a similar principle.

The Scanning Mobility Particle Sizer (SMPS) measures aerosol concentration as a function of particle size using bipolar charge distribution and differential mobility analysis methods. This fast-scanning instrument allows for measurements to be taken at a 60-second time resolution.

The Aerodynamic Particle Sizer Spectrometer (APS) provides high-resolution, real-time measurements of aerosols ranging in size from 0.5 to 20 µm. The instrument relies on time-of-flight measurements, which account for variations in aerosol shape, and are unaffected by the index of refraction or Mie scattering.

The Model 5030 Synchronized Hybrid Ambient Real-time Particulate (SHARP) Monitor is a hybrid nephelometric/radiometric PM2.5 mass monitor. The SHARP monitor incorporates a high sensitivity light scattering photometer.

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

The microAeth AE51 is a real-time, pocket-sized Black Carbon aerosol monitor. This palm-size instrument is small enough to be worn on-person and provides aerosol Black Carbon concentration in real-time.

The device is a self-contained instrument with built-in pump, flow control, data storage, and battery designed for on-person exposure monitoring. It can operate continuously for up to 24 hours on a single battery charge.
The air sample is collected on T60 (Teflon coated glass fiber) filter media. The filter media is housed in an easy to replace filter strip for simple handling in the field.

The Optical Particle Sizer (OPS) Model 3330 is a light, portable spectrometer that provides fast and accurate measurement of particle concentration and particle size distribution using single particle counting technology.

The Ultrafine Particle Monitor Model 651 is a continuous laminar flow condensation particle counter that uses water as its working fluid. The Model 651 provides rapid, high-precision measurement of the numbers of ultrafine (down to 7 nm) airborne particles.

The DUSTTRAK Aerosol Monitor is a portable instrument used to provide-real time measurements of PM₁₀, PM­_2.5 or PM_1.0. The DUSTTRAK utilizes a battery-operated laser photometer to determine aerosol concentration (mg/m³), which can be stored using the instrument’s data logging option.