Laser diffraction particle size analyzers are used to measure the sizes of particles in a material. Particle size is calculated by measuring the angle of light scattered by the particles as they pass through a laser beam. Laser diffraction analyzers are used in many applications, including manufacturing, quality control and product development. Because this technique can continuously measure particle sizes across a wide range, from 10 nm to 3 mm, laser diffraction particle size analyzers are often used in industrial settings.
A laser diffraction particle size analyzer uses multiple light detectors, with more detector elements extending sensitivity and size limits. The time needed to measure particle sizes varies by instrument, ranging from 2 seconds to 10 minutes per sample. The light source used by a laser particle size analyzer also affects particle size measuring limits; shorter wavelength violet and UV lasers are better suited to measure submicron-sized particles than red lasers.
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Malvern Panalytical
- 0.01 - 3500 µm
- Max. 4mW He-Ne, 632.8 nm / Max. 10mW LED, 470nm
- < 10 sec
- Log-spaced array
Bettersize Instruments Ltd.
- Wet dispersion: 0.02 to 2,600 µm
Dry dispersion: 0.1 to 2,600 µm
Dynamic imaging: 2.0 to 3,500 µm
- Typical measurement time: Less than 10 seconds
- 92 detectors (forward, lateral and backward arrangements)
Shimadzu
- 17 nm to 2,500 µm
- Red Semiconductor laser (Wavelength 680 nm)
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Malvern Panalytical
- 0.1 to 2000 um
- 5 mW, 632.8 nm HeNe Laser
- 30 s (Rapid mode), 60 min (Continuous mode)
- 36 element log-spaced silicon diode detector array
Shimadzu
- 7 nm to 800 µm
- Semiconductor laser (Wavelength 405 nm)
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Sympatec
- 0.25–3,500 µm (configuration dependent; in-line: 0.25–1,750 µm)
- Laser diffraction (same core optical technology as HELOS)
- Real-time; up to 2,000 measurements per second
- Multi-element detector array; 5–7 measuring range modules depending on configuration
Sympatec
- 0.1–875 µm (modules R1–R6); up to 0.1–8,750 µm with extended range
- He-Ne laser (parallel beam, large working distance)
- Extremely short analysis times, especially for dry dispersion; real-time measurement
- Multi-element detector array; 8 measuring range modules R1–R8 from 0.1 µm to 8,750 µm
Microtrac Inc.
- 0.01 µm to 4,000 µm
- Red laser 780 nm (0.35-2 mW nominal); Blue laser 405 nm (4-8 mW nominal, optional). Class 1 laser product per CFR 1040.10 & IEC60825-1.
- 10 to 30 seconds
- Two fixed photo-electric detectors with 151 logarithmically spaced segments covering 0 to 165 degrees of angular scatter
Sympatec
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Sympatec
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Bettersize Instruments Ltd.
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Malvern Panalytical
- 0.1 - 1000 µm
- Max. 4mW He-Ne, 632.8 nm
- < 10 sec
- Log-spaced array
Malvern Panalytical
- 0.1 - 1000 µm
- Max. 4mW He-Ne, 632.8 nm
- < 10 sec
- Log-spaced array
Bettersize Instruments Ltd.
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HORIBA Scientific
- 10 nm - 5000 µm (Option dependent)
- Red solid state 5 mW laser diode (650 nm), Blue solid state 3 mW LED (405 nm)
- 60 seconds from liquid filling, sampling and measurement to rinsing
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Bettersize Instruments Ltd.
- 0.1 µm - 1000 µm
- High-power fiber semiconductor laser (10 mW/635 nm)
- Less than 10 seconds
- 86 photodetectors (forward, lateral and backward arrangements)
Bettersize Instruments Ltd.
- 0.01 - 3500 µm (Laser System)
2 - 3500 µm (Image System) - Polarized light-pumped solid-state laser (10 mW / 532 nm)
- Less than 10 seconds
- 96 detectors (forward, lateral and backward arrangements)
HORIBA Scientific
- 0.01 µm to 8000 µm (total range, wet and dry)
- LD (650 nm) 5 mW laser diode, LED (405 nm) maximum 10 mW
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Microtrac
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Malvern Panalytical
- (Lab and Pro) 0.1 - 1000 µm / (Ultra) 0.01 - 3500 µm
- (Lab / Pro / Ultra) Max. 4mW He-Ne, 632.8 nm / (Ultra) Max. 10mW LED, 470nm
- < 10 sec
- Log-spaced array
HORIBA Scientific
- Approximately 10 mg to 5 g (Depending on the particle size, distribution, and density)
- Laser diode 5mW, λ=650nm
- Data can be obtained in as little as ten seconds.
- 64 ring detectors x 1, Silicon photo detectors x 6
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Microtrac MRB
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- Semiconductor laser; 635 nm; 3.5 mW; Class 3R
- Spray: 0.02–500 msec; Continuous: 1–600 sec
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HORIBA Scientific
- 10 nm to 15 microns
- 445nm Blue Diode Laser (350mW), 520nm Green Diode Laser (60mW), 635nm Red Diode Laser (35mW)
- Approx. 10 minutes
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OMEC Instruments
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HORIBA Scientific
- Minimum volume of 12 µL*3 to 1000 µL (differs depending on cell material)
- Diode-pumped frequency-doubled laser (532 nm, S2 / Z2 10 mW, HS2 / HZ2 100 mW)
Detectors: Photomultiplier tubes (PMT)
- Approx. 2 min. under ordinary conditions
(from the start of measurement to the display of results for particle size measurement)
- Photomultiplier tubes (PMT)
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Microtrac MRB
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- ~ 10 to 30 seconds
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