Beckman Coulter Multisizer 4 Particle Counter, 0.4 - 1600 µm, Beckman Coulter (CAT#: STEM-AIPO-0008-YJL)

Beckman Coulter Multisizer 4 Particle Counter, 0.4 - 1600 µm, model Multisizer 4, is manufactured by Beckman Coulter. The Beckman Multisizer™ 4 is one of the most versatile and accurate particle sizing and particle counter analyzers on the marketing today.
Beckman Multisizer™ 4 – Electrical Sensing Zone
The Beckman Multisizer™ 4 uses the coulter principle or electrical sensing zone (ESZ). This method allows the Beckman Multisizer™ 4 to return distributions in number, volume and surface area in a single measurement.
The overall sizing range of the Beckman Multisizer™ 4 is 0.4 µm to 1600 µm. The response is not affected by particle shape composition, refractive index or color.
Beckman Multisizer™ 4 – Electrical Sensing Zone
Coulter principle is the leading technology in high resolution and accuracy. The Beckman Coulter Multisizer™ 4 enhances this even further by using the Digital Pulse Processor or DDP. DDP produces ultra-high resolution, multi channel analysis and accuracy that is otherwise unattainable by similar technologies. These features make the Beckman Multisizer™ 4 ideal for any research project involving sizing and or counting.
The Multisizer™ 4 is also an equally powerful tool for quality control. Analysts now have an easy to use system that is so advanced, it can solve most particle sizing problems. The Beckman Multisizer™ 4 is the latest coulter counter that is designed with Smart and DDP technologies offering highly reliable and accurate particle counting and sizing.
The Beckman Coulter Multisizer™ 4 retains the enhanced analog circuits developed and refined by Beckman Coulter over many years. It was the Beckman Coulter Multisizer™ 3, which first introduced DPP to particle counting.
Beckman Multisizer™ 4 – The Digital Principle Coulter incorporates the latest advances in both analog and digital circuits. High speed digitization of signals enable the use of multiple parameters for more accurate particle characterization. Dynamic size measurement is now a reality in the Beckman Multisizer™ 4. Measurements for each particle are analyzed and stored; the stored data can then be analyzed and formatted in a number of ways. The stored data may also be re-analyzed at a later date. With the Beckman Coulter Multisizer™ 4 there is no need to analyze the same particle twice.

Condition: Certified Pre-Owned
Humidity: 10% to 80% without condensation
Particle Size Analysis Range: 0.4 µm to 1600 µm in diameter.
0.033 fL to 2.145 x 109 fL or µm3 in volume
Number of Channels: Pulse data is digitized and can be processed to achieve up to 400 size channels for a selected pulse range. Number of channels and range can be reprocessed as necessary.
Aperture Tube Analysis Range: Total range: 2% to 80% of aperture diameter.
Standard Range: 2% to 60% of aperture diameter.
Extended Range: 60% to 80% of aperture diameter.
Dynamic Range of Aperture: Standard 1:30 (by diameter) Total 1:40 (by diameter)
Standard 1:27,000 (by volume) Total 1:64,000 (by volume)
Linearity: ± 1% for diameter
± 3% for volume
Metering System: Mercury-free, wide range metering pump
Power Requirements: Less than 55 volt-amps (watts)
Regulatory Compliance: The software enables 21 CFR Part 11 compliance
Resolution: User selectable
Volumetric Pump Accuracy: Better than 99.5%
Operating Altitude: Up to 2000 m (6560 ft)
Operating Temperature: 5℃ to 40℃
Aperture Current Accuracy: ± 0.4% of setting
Aperture Current Range: 30 µA – 6000 µA in 0.2 µA steps
Aperture Diameter: 20 µm to 2000 µm apertures
(nominal diameters)
Digital Pulse Processor: Proprietary high-speed digitalization of the signal.
Dimensions and Weight (excluding computer): Unpacked weight: 45 kg (99 lb)
Width: 64 cm (25 in)
Depth: 61 cm (24 in)
Height: 51 cm (20 in)
Input voltage within set ranges: 100 – 120 VAC; 230 – 240 VAC ± 10%; single phase
Electrolyte Solutions: All aqueous and non-aqueous electrolyte solutions recommended for use with aperture technology will be suitable for use with the Multisizer™ 4. Electrolytes should be compatible with glass, fluoropolymers, fluoroelastomers and stainless steel.
Environmental Conditions: a) This instrument is safe for indoor use only.
b) Installation category: 11.
c) Pollution degree: 1.
Fuse Types: 250 V, IEC (5×20 mm), Time delay (TD), 2.0 A
Modal Count Mode: 10 to 100,000 counts
Polarity Error: Less than 0.5%
Pulse Data: Time stamped pulses up to 525,000 per single analysis.
Pulse Distribution Data: Pulse distribution by time, sequence and width for pulse height diameter, pulse height volume, pulse height volt, pulse width, pulse area, average pulse height diameter, average pulse height volume and average pulse width. Number distribution by width.
Size Distribution Data: Size distribution by diameter, volume and area for number, number%, number/ml, volume, volume%, volume/ml, surface area, surface area% and surface area/ml.
Supply Frequency: 47 to 63 Hz inclusive
Time Mode: 0.1 to 999 seconds, selectable in 10 ms increments. Typically, time analysis is 10 to 90 seconds.
Total Count Mode: 50 to 500,000 counts
Volumetric Mode: Continuously selectable from 50 µL to 2000 µL

Increased dynamic range over MS3
Increased resolution over MS3
Quality assurance friendly
Digital Pulse Processor (DPP)
Dynamic size measurements
Provides number, volume, mass and surface area size distributions in one measurement
V-Check (IQ, OQ, PQ) instrument validation
Proven Technology
More than half a century of experience counting and sizing particles and cells
More than 6,000 documented references using the Coulter Principle and nine approved ASTM methods
Technology defined by the International Standard ISO 13319 Accurate sizing, counting and high resolution technology preferred by the industry for particle counting and size distribution
It provides size, based on direct measurement of a real parameter of a particle – its volume. Color or refractive index does not affect results
Capable of counting and sizing particles at concentration levels not detected by other technologies
Dynamic size measurement. Pulse time stamp allows size change measurement in real time
Superior Design
Ease-of-use. Instrument operation is completely controlled from the computer. Intuitive software with wizards are ideal for beginners, while simple menus assist experienced operators
Volumetric metering pump is compatible with both aqueous and organic fluids
Extended dynamic range
Environmentally friendly, mercury-free metering system
Improved performance in dusty environments
Sample management system using Smart Technology provides a great level of consistency for running the analyses
EZAccess fluid management system
Electronic aperture blockage detection
Automatic start-up user-selectable routine
Quality & Ease
User-defined Standard Operation Procedure
Multiple security levels
Software enables 21 CFR Part 11 compliance
Powerful and flexible software allows the processing and presentation of data to fit all needs, including industrial applications, biological applications, academic applications, research and quality control
Automated calibration and calibration verification ensures reliable results for both size and counts
V-Check validation package offers a comprehensive solution for today’s quality assurance requirements
Certification program to ensure instrument performance

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