Beckman Coulter Multisizer™ 4


Multisizer™ 4

Discover the most versatile and accurate particle sizing and counting analyzer on the market. Using the Coulter Principle, also known as Electrical Sensing Zone (ESZ), the Multisizer 4 COULTER COUNTER® provides size distributions in number, volume and surface area in one measurement, with an overall sizing range of 0.4 µm to 1600 µm. Its response is unaffected by particle color, shape, composition or refractive index. The Coulter Principle is the leading technology in high resolution and accuracy and it is enhanced even further in the Multisizer 4 by using a Digital Pulse Processor (DPP). DPP provides ultra-high resolution, multiple channel analysis and accuracy that is unattainable by other technologies. It all makes the Multisizer 4 indispensable for any research project involving sizing and/or counting. An equally powerful tool for quality control, the Multisizer 4 provides analysts with an easy-to-use system that is so technologically advanced, it can solve most particle sizing problems.
Multisizer™ 4
Temperature Range 5 to 40 °C
Size .4 to 1600 µm
Measurement Time 0.1 to 999 seconds, selectable in 10 ms increments. Typically, time analysis is 10 to 90 seconds.
Depth 24 in (excluding computer)
Height 20 in (excluding computer)
Width 25 in (excluding computer)
Power Requirements Less than 55 volt-amps (watts)
Weight 99 lbs (excluding computer)
Additional Specifications UNSPSC: 41113903     
Humidity: 10% to 80% without condensation     
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)     
Metering System: Mercury-free, wide range metering pump     
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)     
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.     
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.     
Fuse Types: 250 V, IEC (5x20 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     
Total Count Mode: 50 to 500,000 counts     
Volumetric Mode: Continuously selectable from 50 µL to 2000 µL


  • Increased dynamic range     
  • Increased resolution     
  • Proven technology     
  • Superior instrument design     
  • 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     


Multisizer™ 4 COULTER COUNTER®

Multisizer™ 4 COULTER COUNTER®

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Communication problem

Can't connect to Multisizer 4 via IP protocol. Tried: Checked cable (tried another cable) Checked PC NIC IP config Checked software target IP ( Tried another computer with same software settings and...

about size error

Hi, I want to measure the cell size, but recently the results are half as they should be. If the error is small, I can calibrate it. But if the values become half of the values before, should I still calibrate it? or there is something wrong in...

Particle Concentration

I am using the Multisizer 4 to test sediment particle size for research at the University of South Carolina.  I am currently having an issue with the concentration of sediment.  Before I have put any sediment into the beaker, the...

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