PSA Series
Particle Size Analyzer
Particle size analysis by laser diffraction
Anton Paar’s PSA series incorporates more than fifty years of experience.
The world's first laser diffraction particle size analyzer – the first-ever PSA – was invented
in 1967. The three models PSA 990, PSA 1090, and PSA 1190 are designed to measure
a wide range of particle sizes in liquid dispersions or dry powders.
PSA Product Family
PSA 990
PSA 1090
PSA 1190
2500 μm
The laser diffraction technique is an established method to measure particle sizes from the upper nanometer to the millimeter range.
A laser beam is directed onto dispersed particles, then the laser light is diffracted by the particles, and the corresponding diffraction
pattern is detected and evaluated. Anton Paar’s PSA instruments work with high-resolution detectors to provide accurate and
re­pro­ducible measuring signals that are used to calculate particle size distributions based on the Fraunhofer and Mie theories. This
guarantees full compliance with the ISO 13320 and USP <429> standards.
The PSA instruments
stand out for their broad
particle size measuring
range due to
-- their multiple-laser technology
-- their flexibility to measure dry and
liquid samples with one setup
-- their high measuring accuracy and repeatability
-- their robust design
Solutions for a wide range of industries
Cement & Building Materials
The PSA instruments, in fact, were designed following a request from the cement industry
to develop a new technique for particle size measurement. To date, the requirements have
not changed and the instruments are still widely used in the cement and building industry.
The cast-iron base plate makes the system rugged enough to be used in the harshest
environments. The patented (FR2933314) Dry Jet Dispersion technology ensures that
the particles are homogeneously distributed within the sample. In this way, even cement
samples that tend to agglomerate can be measured precisely.
Mining & Minerals
In the mining and minerals industry the robust design of the PSA instruments comes into
play. All optical components are mounted on a cast-iron base plate to ensure the system
remains in alignment even under the harshest conditions. The standard measurement range
of 0.2 µm to 500 µm provided by PSA 990 is ideally suited for the needs of this industry.
The integrated ultrasonic transducer provides you with an effective tool to de-agglomerate
Pharmaceuticals & Cosmetics
Accurate, repeatable, and traceable measurements are crucial in pharmaceutical
applications. All PSA particle size analyzers are calibrated according to the ISO 13320 and
USP <429> standards to ensure the highest accuracy and repeatability. The software is
21 CFR Part 11 compliant for complete traceability of results. The extended measurement
range of 0.04 µm to 2500 µm provided by PSA 1190 allows you to analyze the widest range
of particles, from raw materials to final formulations.
Particle size is an important parameter affecting the characteristics of food products.
Anton Paar's PSA instruments give important information for production, inspection of raw
materials, product development, and quality control. The PSA 1190 particle size analyzer
covers a measuring range from 0.04 µm to 2500 µm and allows both small and large
particles to be characterized. The “free fall” module, specifically designed for fragile food
samples, ensures the non-destructive transport of the sample to the measuring cell. Thus,
damage to the particles due to external forces is avoided.
Chemical & Petrochemical
Companies in the chemical and petrochemical industries are challenged with analyzing
particles in the sub-micrometer range. PSA 1090 is ideally suited for these measurements
because it offers the world’s first dual-laser design, which guarantees the highest level
of accuracy and precision from 0.04 µm to 500 µm. Only Anton Paar’s laser particle size
analyzers fully integrate liquid and dry dispersion modes. This eliminates the need to
manually switch, adjust, or align any hardware, and saves time. Solutions are available for all
types of samples, including aggressive or expensive products and reagents.
Technical highlights
Measurement of liquid and dry samples?
The PSA series integrates both in one
single instrument
PSA instruments are the only particle size analyzers that can be
configured with fully integrated liquid and dry dispersion modes
in one instrument. This unique design eliminates the need for
the operator to handle several accessories or make manual
adjustments. The software enables the switching between liquid
and dry dispersion modes with a single mouse-click, which
saves time and prevents operation errors. There is no need to
exchange the hardware, re-validate, or re-align sensitive optics
when switching between dispersion modes.
Fully reliable results?
The PSA series sets the benchmark
Anton Paar’s particle size analyzers are fully ISO 13320
compliant to meet your demand for traceable, accurate, and
repeatable results. Whether running samples in dry or liquid
dispersion modes, the complete analyzer is qualified using
certified reference materials. The unique design of the lasers and
the optical bench set the market standard for a measurement
reproducibility that is better than 1 % variation. Accuracy and
reproducibility are guaranteed for the entire life of the particle
size analyzer.
Stability for a lifetime?
The unrivaled robust design of the PSA
series makes it possible
The unique optical bench design has all optical components
permanently mounted on a cast-iron base plate. This ensures
alignment-free operation, even in the harshest environments.
The rugged design ensures that the system remains aligned
and this reduces the maintenance requirements to a minimum
throughout the entire life of the instrument.
Accurate size distribution of powder
particles? The unique Dry Jet Dispersion
technology is the solution
The size of dry powders is often difficult to measure because
the particles tend to agglomerate, which falsifies the results.
Dry Jet Dispersion (DJD) technology is Anton Paar’s patented
technique (FR2933314) for efficiently dispersing and precisely
analyzing powder particles. The innovative design features an
air pressure regulator that quickly and easily adjusts the air flow
in accordance with the sample properties. The shear forces
created by the air flow separate agglomerated particles and in
this way the size of each single particle can be detected.
Broad particle size range? The PSA series
measures particle sizes from submicrons to
a few millimeters
The single-laser PSA 990 covers a wide measuring range of
0.2 µm to 500 µm. For an even broader range, PSA 1090
and PSA 1190 have a unique optical design for diffraction
analysis, which includes multiple lasers. While PSA 1090 has
been designed with two lasers to resolve particles as small as
40 nanometers, PSA 1190 contains an additional third laser to
cover the full measurement range of up to 2.5 millimeters.
Anton Paar’s autosampler for the PSA series is the only sampler on the
market that can be used for both wet and dry dispersions, and is able to
automate the sample measurement process. Available for the PSA 990,
PSA 1090, and PSA 1190 models, the autosampler picks up and pours
samples automatically into the particle size analyzer, enabling you to
focus on other tasks. The autosampler is suitable for both industrial and
lab applications.
-- Comes with both dry and
wet modes
-- Automatic pick-up and pouring
of up to 30 samples
-- Suitable for repeatable and
high-rate cycle processes
-- Time-saving
-- Eliminates risk of manipulation
-- Integrated rinsing cycles
-- User-friendly operation
integrated with the PSA software
(no additional software required)
Small Volume Unit
The Small Volume Unit (SVU) was specially designed for users who
need to reduce the measured sample volume e.g. of costly samples.
Only 40 mL of sample is necessary to measure accurate particle size
distributions. The SVU is also suitable for aggressive solvents such as
acetone or benzene.
-- Integrated mechanical stirrer,
peristaltic pump, and ultrasonic
-- Solvent volume of down to
45 mL (PSA 1190) /
40 mL (PSA 1090, PSA 990)
-- Sample quantities of
down to 50 mg
PSA 990
Measurement principle
PSA 1090
PSA 1190
Laser diffraction
Measuring range (dry)
0.3 µm to 500 µm
0.1 µm to 500 µm
0.1 µm to 2500 µm
Measuring range (wet)
0.2 µm to 500 µm
0.04 µm to 500 µm
0.04 µm to 2500 µm
Venturi/free fall
Dry dispersion
Liquid dispersion
2 peristaltic pumps/ultrasonic transducer/stirrer
better than 1 % variation
better than 3 % variation
Measuring time
Number of lasers
<1 min
Laser safety classification
FDA Title 21 CFR - Part 1040 & EN 60825-1:2014
Laser class, closed cover
Class 1 of EN 60825-1:2014
Laser class, open cover
Digital data security
Electromagnetic compliance
Low voltage
Dimensions (L x D x H)
Class 3R of EN 60825-1:2014
FDA Title 21 CFR - Part 11
EN 61326-1:2013
EN 61010-1:2010 & EN 61010-2-081:2015
890 mm x 530 mm x 430 mm; 35 in x 21 in x 17 in
~ 55 kg
© 2017 Anton Paar GmbH | All rights reserved.
Specifications subject to change without notice.