Laser diffraction sensor HELOS/BR with measuring zone for the insertion of dry / wet dispersers or/ sample couplers for particle size analysis from 0.1 µm to 875µm (to 3500 µm with HELOS/KR, HELOS-VARIO/KR).
Technical specifications and dimensions.
HELOS, the well proven laser diffraction sensor is the first system using one measuring principle (laser diffraction in the parallel laser beam) for the whole measuring range from 0.1 µm to 8750 µm. Two evaluation modes are offered: FREE: a parameter free solution basing on Fraunhofer diffraction and MIEE: basing on precision Mie theory extended to the full size range, as an option. The combination of measuring ranges is available for both, allowing the analysis of extremely wide size distributions at highest precision.
It is the classical instrument for particle size analysis of dry and wet samples, i.e. of powders, suspensions, emulsions or sprays. It is entirely built to the specifications of ISO 13320 "Particle size analysis - laser diffraction methods" - and designed for absolute precision measurements to typically ±1% with respect to the standard metre.
High resolution and guaranteed reproducibility, combined with high speed data acquisition, network interface and the standardised WINDOX software supporting all Sympatec's instruments, result in superior solutions.
The HELOS analysis system with its modular configuration and in combination with appropriate dispersing units adapts in an ideal way to the products to be analysed.
Highlights of HELOS
(Helium-Neon Laser Optical System)
HELOS represents a family of laser diffraction sensors, which are all built to the same high quality standards. Members of the family are:
| Model1 | Measuring range | Application | |
| HELOS | /BR |
0.1 - 875 µm
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off-line / at-line
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| /KR |
0.1 - 8 750 µm
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off-line / at-line
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| VARIO | /KR |
0.1 - 8 750 µm
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off-line / at-line
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| MYTOS2 |
0.25 - 3 500 µm
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on-line / in-line
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Outstanding performance characteristics common to all HELOS sensors:
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One measuring principle for the complete size range from 0.1 µm to 3500 µm, in a parallel laser beam of 632.8 nm, fully compliant with ISO 13320. |
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Absolute accuracy is typically within ±1% with respect to the standard metre. |
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Up to seven measuring range modules are selected by software, each using a specially designed (Fourier-) objective for highest precision and resolution of the particle size distribution. |
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Modular design structure for best adaptation of the sensor to the analysis of powders, suspensions, emulsions, aerosols and sprays with specific dispersing units. |
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Precision semicircular (180°) multi-element photo-detector with auto-alignment for optimum acquisition of the diffraction patterns, especially of non-spherical particles. |
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Automatic adaptation of the beam diameter to the measuring range allowing for largest working distances, which is important e.g. for the measurements of extended aerosols etc. |
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Evaluation of particle size distributions withFREE (Fraunhofer Enhanced Evaluation): Fraunhofer theory (applicable without knowledge of optical parameters) down to 0.1 µm or
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WINDOX 5 software for control of the instruments and evaluation of particle size analysis data:
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Rigid full metal housing with integrated precision optical bench allowing for the operation of the sensor in any orientation, i.e. upside down for spray applications or even vertical.
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Communication:
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1For the specificatons of the former HELOS/F family please refer to HELOS/F.
2For the specifications of MYTOS please refer to MYTOS.
