U-SMPS 2050 X/2100 X/2200 X Universal Scanning Mobility Granularity Analyzer

Universal scanning mobility particle size analyzer with integrated X-ray ionization function

Suitable for various applications ranging from 8 to 1200 nm

Figure 1: U-SMPS2050X / 2100X / 2200X

Palas ®The Universal Scanning Mobility Particle Size Spectrometer (U-SMPS) is available in two versions. The long classification column (2050X/2100X/2200X models) can determine particle size distributions ranging from 8 to 1200 nm. This series has integrated an X-ray source as a neutralizer (see Figure 1), replacing the radioactive neutralizer (such as using Kr-85), with the advantage that there is no need to follow the requirements for the radioactive source during transportation. Palas ® The U-SMPS system includes a classifier [defined in ISO15900 as a mobility classifier (DEMC), also known as a differential mobility analyzer (DMA)], which can select the corresponding aerosol particles based on their mobility and transport them to the outlet. Then count these particles using a condensation particle counter (such as UF-CPC). The three available UF-CPC models can achieve optimal single particle counting in various concentration ranges. Palas used an algorithm developed by Professor Wiedensohler (IfTLeipzig, Germany) to convert measurement data into the particle distribution of U-SMPS. U-SMPS uses a graphical user interface and operates on a touch screen. A particle distribution scan can be performed in just 30 seconds, with up to 64 size channels per decimal. During the scanning period, the voltage in the DEMC classifier continuously changes, resulting in higher counting and statistical efficiency for each size channel. The integrated data logger allows for linear or logarithmic display of measurement values on the device. The accompanying evaluation software can provide various data evaluations (various statistics and averages), as well as export functions. U-SMPS typically operates as a standalone device, but can also be connected to a computer or connected to a network using various interfaces (USB, LAN, WLAN, RS-232/485). Palas ® U-SMPS supports DMA, CPC, and other manufacturers' aerosol electrostatic meters. U-SMPS is extremely important for accurate particle size determination and reliable performance, especially for calibration. All components must undergo strict quality assurance testing and must be assembled internally. Figure 2 illustrates the working principle of U-SMPS: aerosols undergo adjustment before entering the classifier (DEMC). The optional dryer (such as silica gel, Na fi on) can remove moisture from particles. Bipolar neutralizer (XRC 049) is used to ensure that the aerosol charge distribution conforms to the predetermined pattern. A impactor is required at the entrance of DEMC to remove particles larger than the size range of the classifier.

Figure 2: Working principle of the Scanning Mobility Particle Sizer (U-SMPS). Aerosols are introduced through the injection port of the DEMC column and merged with the sheath gas along the external electrode. The merging process should avoid turbulence and ensure laminar flow. The surface of the electrode must be extremely smooth and precise. The sheath gas is a dry, particle free carrier gas (usually air) with a larger volume than aerosols, and continuously circulates in a closed loop. The volume ratio of sheath air to sample air determines the transfer efficiency, which in turn determines the resolution of the size classifier. Apply a voltage between the internal and external electrodes to generate a radially symmetrical electric field. The inner electrode is positively charged and has a small gap at the end. By balancing the electric field force on each particle and its aerodynamic resistance in the electric field, negatively charged particles are transferred to the positive electrode. According to their electric mobility, some particles will leave the DEMC through small gaps at the top. In operation, the electric field generated by the voltage continuously changes, causing particles with different migration rates to leave the DEMC and be continuously measured and counted by a nanoparticle counter (such as a condensation particle counter) (such as Palas) ® UF-CPC）。 Convenient and practical software provides multiple data information (such as voltage, particle number, etc.) and obtains particle size distribution data, as shown in Figure 3.

Figure 3: Palas ® The particle size distribution of aerosols generated by DNP3000 particle generator. The user interface and software optimized based on customer feedback enable intuitive operation, real-time control, and display of measurement data and parameters. In addition, the software can achieve data management functions through integrated data loggers, comprehensive export functions, and network connections. Measurement data can be displayed and evaluated in various forms. Available systems: The following document introduces DEMC and Palas ® Various combinations of counters provided. Most DMA, CPC, and aerosol electrostatic meters provided by other manufacturers can be used as components of U-SMPS systems.

advantage:

The particle size distribution range is from 8nm to 1.2 μ m

Principle of Continuous and Rapid Scanning Measurement

High resolution, up to 128 size channels/decimal suitable for up to 108 particles/cm³The concentration

Universal graphical display of measurement results with DMA and nanoparticle counters from other manufacturers

7 Inch touch screen and GUI intuitive operation with built-in data logger

Support multiple interfaces and remote access

Low maintenance

Reliable functionality

Reduce your operating expenses

Application areas:

Filter test

Aerosol research

Environmental and Climate Research Inhalation Experiment

Indoor and workplace measurements

Manufacturer: Palas, Germany