Particle Measuring Systems

PMS CLS-900 Corrosive liquid sampler is a compression sampler designed for integration into wet benches and process tools. The compressive sampler eliminates bubbles from process chemicals 

PMS CLS-1000 Corrosive liquid sampler is the latest offering from PMS for monitoring the chemicalswithin ultra-pure processing environments. 

PMS HSLIS liquid optical counter provides continuous real-time monitoring of contamination levels in DI watwer and process chemicals providing size sensitivity down to 0.5 pm in DI water and 0.65 pm in process chemicals. 

PMS APSS-200 Automated parenteral sampling system for pharmaceutical fluids is designed to size and count suspended particlate matter in a wide range of liquids. 

PMS APSS Automated particle sampling systems are used to size and count suspended particles in liquids. These systems are ideal for applications where precise small volume sampling is needed. 

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Stream scanning Brinkmann, Glimet, Goulter, Dantec, Erdco, Faley, Flowvision, Hiac/Royco, Kowa, Lasentec, Malvern, Met One, Particle Measuring Systems, Polytec, Procedyne, Rion, Spectrex 0.2-10,000 lm O.l-lOg (also on-line)... 

The operating principle of the CSIRO (Australian Commonwealth Scientific and Industrial Research Organization) King probe (Particle Measuring Systems Inc., Boulder, Colorado) is similar in concept to that of the Johnson-Williams probe. The King probe measures the amount of power necessary to maintain a heated wire at a constant temperature, whereas the Johnson-Williams probe measures the change in resistance due to cooling of the wire by water evaporation. The probe consists of a heated coil of wire that is maintained at a constant temperature. The amount of excess power required to maintain the wire at this temperature when it is impacted by water droplets is measured and is proportional to the cloud liquid water content. The nominal response time of the instrument is 0.05 s, and it has an accuracy of 20%. This instrument uses less power than a Johnson-Williams probe, an important consideration in aircraft applications. 

Figure 9 Output example of continuous airborne particle measurement system.

Fig. 9.11 Particle Measuring Systems Liquid Volumetric Probe, designed for continuous monitoring of process waters, product liquids and semiconductor chemicals.

Particle Measuring Systems Inc., 1855 South 57th Court, Boulder CO 80301, USA, (303) 443 7100 http //www.pmeasuring.com... 

Figure 17 Classic forward light-scattering instruments. (With permission of Particle Measuring Systems, Inc.)...

Particle-measuring systems HIAC/Royco Climet... 

All measurements were made using a Particle Measuring Systems Inc, Laser Aerosol Spectrometer Model LAS-X. The LAS-X Is a light scattering Instrument which uses a He-Ne laser. The gas sampling... 

Figure 1. PMS LAS-X Flow Diagram. (Reproduced with permission. Copyright Particle Measuring Systems Inc.)...

Used with permission from Particle Measuring Systems, Boulder, Colorado. 

PMS Laser particle measurement system RBS Rutherford backscattering spectroscopy... 

Abstract The object of this study is to develop a particle measurement system on the basis of the Statistical Extinction Method, which provides an inline monitoring of different particle processes. The Statistical Extinction Method determines from the mean value and root mean square deviation of a transmission signal through a particle collective, a mean particle size and a particle concentration. For the determination of particle size distribution, an advanced Statistical Extinction Method is developed and verified. This method requires the measurement of transmission signals of several light beams of different beam cross sections through a particle collective. 

In many cases, the determination of a mean particle size and particle concentration is adequate for the monitoring of particle processes. For the investigation of the fundamental processes of particle processes, such as spray drying processes, the knowledge of the particle size distribution and the particle concentration is important. For this purpose, these quantities must be measured inline. An inline monitoring of particle processes has high demands on particle measurement systems, due to high particle concentrations or process temperatures, for example. 

In this work, two optical particle measurement systems, on the basis of Statistical Extinction Method, have been developed. The Statistical Extinction Sensor (SE-Sensor) determines a mean particle size and a particle concentration inline in particle processes. Eor this purpose, the temporal course of the transmission of a light beam through the particle collective is measured and the mean particle size and the concentration are determined according to the Statistical Extinction Method (SE-Method). The PSD-SE-Sensor measures the temporal course of the transmission of nine light beams with different beam cross sections and determines a particle size distribution and concentration according to an extended Statistical Extinction Method (PSD-SE-Method). 

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