SYMPATEC HELOS & SPRAYER Nasal Spray Particle Size Analyzer

Overview

The SYMPATEC HELOS & SPRAYER Nasal Spray Particle Size Analyzer is a purpose-built laser diffraction system engineered for the quantitative, time-resolved characterization of aerosolized drug products delivered via nasal pump sprays. It integrates the high-precision HELOS optical platform—based on Fraunhofer diffraction theory—with the SPRAYER modular adapter and SMACTOR intelligent actuation system to enable controlled, reproducible, and physiologically relevant spray event simulation. Unlike conventional static particle sizing instruments, this system captures dynamic spray behavior across three physiologically defined phases: initiation, steady-state emission, and dissipation. The measurement principle relies on real-time analysis of forward-scattered laser light intensity patterns generated by particles or droplets intersecting a collimated He–Ne beam (632.8 nm) within an open, unobstructed measurement zone. This configuration supports ISO 13320-compliant diffraction-based size distribution calculation while accommodating transient, low-mass, and low-density aerosol clouds typical of metered-dose nasal formulations.

Key Features

• Modular architecture combining HELOS laser diffraction optics with SPRAYER mechanical interface and SMACTOR programmable actuator
• Time-resolved acquisition at up to 2000 distributions per second in Time-Slice Mode, enabling microsecond-scale resolution of spray dynamics
• Three-phase segmentation algorithm aligned with FDA-recommended spray classification (Initiation, Steady-State, Dissipation)
• Programmable actuation parameters: stroke length, peak acceleration, maximum velocity, applied force, and force ramp time—fully decoupled and independently configurable
• Real-time sensor feedback loop for nozzle alignment verification and laser beam centering assurance
• Open measurement volume design compatible with vial holders, tilt-adjustable fixtures, and optional ROTOR angular positioning system (±90° rotation, 0.1° resolution)
• Automated distance control between nozzle tip and laser plane via motorized Z-axis stage (repeatability ±10 µm)

Sample Compatibility & Compliance

The HELOS & SPRAYER system accommodates standard nasal spray containers (e.g., 10–30 mL glass or polymer bottles with Luer-lock or integrated pump mechanisms) without modification. Its open-path geometry eliminates chamber wall effects and supports direct-line-of-sight measurements required for regulatory submissions. The system is designed to meet methodological expectations outlined in FDA’s “Product Quality Considerations for Nasal Sprays and Inhalation Aerosols” guidance (2022), including requirements for spatially resolved sampling, phase-specific reporting, and inter-unit reproducibility assessment. Data integrity is maintained through audit-trail-enabled software compliant with 21 CFR Part 11 principles, supporting GLP/GMP environments. All firmware and software modules undergo periodic verification per ISO/IEC 17025 calibration traceability protocols.

Software & Data Management

WINDOX 6 software provides full instrument orchestration—including synchronized trigger sequencing, real-time diffraction pattern visualization, and automated phase identification. Four dedicated acquisition modes are implemented: Full-Spray Integration (cumulative distribution), Three-Phase Analysis (FDA-aligned temporal binning), Time-Slice Mode (high-frequency sequential distributions), and Time-Bracket Mode (user-defined temporal windows followed by statistical consolidation of stable-phase data). Raw diffraction images, metadata logs (actuation parameters, environmental conditions, alignment diagnostics), and processed distributions are stored in vendor-neutral HDF5 format. Batch processing, statistical comparison (e.g., %RSD across replicates), and export to CSV/PDF/PNG are supported. Software validation documentation (IQ/OQ/PQ templates) and electronic signature workflows are available upon request.

Applications

• Formulation development: Screening excipient effects on droplet size distribution and spray plume stability
• Device–drug interaction studies: Quantifying impact of pump design, spring tension, and valve geometry on emission characteristics
• Stability testing: Monitoring changes in fine particle fraction (FPF) and mass median aerodynamic diameter (MMAD) over shelf life
• Batch release testing: Confirming conformance to pre-established specifications for Dv10, Dv50, Dv90, and span
• Regulatory filing support: Generating datasets compliant with ICH Q5A(R2), USP , and EMA CHMP reflection papers on nasal delivery systems
• Cross-platform correlation: Benchmarking against cascade impaction (NGI/ACI) and imaging-based methods (e.g., phase-Doppler anemometry)

FAQ

Is the HELOS & SPRAYER system compatible with non-nasal aerosol applications?
Yes—when paired with appropriate adapters and actuators (e.g., SMACTOR with universal mounting brackets), the system supports inhaler, ophthalmic spray, and industrial atomizer characterization.
Does the system require external environmental control?
Ambient temperature and humidity monitoring is recommended; optional climate-controlled enclosures are available for ISO 14644-1 Class 7 cleanroom integration.
Can raw diffraction data be exported for third-party analysis?
Yes—full 2D intensity matrices and metadata are exportable in HDF5 format, preserving all calibration and acquisition parameters.
What maintenance is required for long-term operational reliability?
Annual optical alignment verification and biannual HELOS laser power calibration are advised; SPRAYER mechanical components are rated for >50,000 actuation cycles.
Is training and application support included with purchase?
SYMPATEC provides on-site installation qualification, operator certification, and application-specific method development assistance as part of standard service packages.