Spraytec | Spray droplet size measurement system (2023)

features and benefits

With over 35 years experience in spray applications, Malvern Panalytical's Spraytec system provides the data needed to fully understand spray and atomization processes. Go to:

  • Measure over a wide size range (0.1 to 2000 microns) without constantly changing optics.
  • Respond to rapid changes in droplet size over time by taking up to 10,000 readings per second.
  • Provide accurate, concentration-independent results using a patented multiple scatter analysis.
  • Feature wide spray plumes with no risk of optical contamination.
  • Easily view dynamic spray particle size changes through its unique historical size analysis software.

How it works

The Malvern Panalytical Spraytec uses laser diffraction technology to measure the size of spray droplets and particles. To do this, it measures the intensity of the scattered light when a laser beam penetrates a spray. This data is then analyzed to calculate the size of the droplets that created the scattering pattern.

The Spraytec system consists of the following main elements:

  • a transmission modulecontains the collimated laser light source used to illuminate the aerosol during a measurement.
  • a receiving modulewhich may contain one of two lenses (300mm or 750mm) that focus the scattered light from the spray onto a series of detectors. These detectors accurately measure the intensity of light scattered by spray droplets over a wide angular range.
  • an optical benchwhich ensures that the transmitter and receiver are aligned. The length can be adjusted to suit different applications, with the longest bench being 2.5m.
  • About Spraytechwhich monitors the system during the measurement process and analyzes the dispersion data to calculate spray size distributions. The results are displayed as a "size history" trend graph, allowing you to instantly see any change in droplet size over time.



principle laser light scattering.
Analyse Mie and Fraunhofer scattering, including a patented multiple scattering analysis.
data collection rate Fast mode: 10 kHz. Continuous mode: 1Hz.
Maximum Distances Fast mode: 30 seconds. Continuous mode: 60 minutes.
measuring shot Internal: Based on light transmission or scattering. External: Based on TTL input or single key trigger.
Synchronization of external devices Via 2 TTL trigger outputs.


light source He-Ne-Laser maximal 4 mW, 632,8 nm.
lens repair Fourier (parallel beam).
focal length of the lens 300mm and 750mm.
measuring range 150 mm to 0.5 µm, over 5 µm more than 1 m.


agreement Array of 36 elements separated by records.
angle range 0,015 – 17 Grad.**
alignment Automatically.

scaling performance

particle size 300mm lens: 0.1-900µm (Dv50: 0.5-600µm). 750mm lens: 2-2000µm (Dv50: 5-1600µm).
precision Better than 1%.***
repeatability Better than 1%.***
reproducibility Better than 1%.***


21 CFR Tel 11 Enables a mode of operation that helps with ER/ES compliance.

system compliance

laser safety Class 3R, IEC60825-1:2007 and CFR Chapter 1: Subchapter J: Part 1040 (CDRH).
official examinations CE/FCC compliant. Meets the requirements of the European Low Voltage Directive.

weight and dimensions

Laborsysteme Optische Bank 950 mm: 950 mm x 550 mm x 610 mm (36 kg). Optische Bank 1400 mm: 37 kg 1400 x 550 x 610 (37 kg).
spray installation systems Optische Bank 950 mm: 950 mm x 550 mm x 650 mm (36 kg). Optische Bank 1400 mm: 1400 x 550 x 650 (37 kg).


Strength 100/240 V, 50/60 Hz.
Product storage temperature -20°C to +50°C.
Operating temperature (°C) +15°C to +40°C.
humidity Maximum 80% for temperatures up to 31°C, decreasing linearly to 50% at 40°C. No condensation.
IP protection) IP65 in normal use


* This defines the maximum permissible distance between the outermost edge of the spray column and the Spraytec receiving lens.
** Lens dependent.
*** It relates to the Dv50 measurement for NIST traceable latex standards. sample dependent.


Aerosol Positioning Accessory

Malvern Panalytical's Spraytec aerosol positioning accessory allows users to position aerosol cans or pump sprays relative to the Spraytec laser diffraction measurement zone during particle size and aerosol measurement.

This helps eliminate a major source of variability associated with spray measurements, allowing for reproducible testing of spray products for home and personal use.

(Video) Laser diffraction spray particle & spray droplet size measurement - Spraytec

air purge accessories

The air purge attachment prevents spray droplets from settling on the Spraytec optics when measuring large or concentrated spray plumes. This enables the routine characterization of products such as paint sprays or agrochemical application systems.

extraction accessories

The Spraytec Extraction Accessory provides a means of collecting and capturing droplets and spray particles during spray particle size measurement. This ensures that recirculation of spray particles is reduced during measurements and also helps manage the risks associated with user exposure to spray droplets.

(Video) Spray particle & droplet size measurement - Spraytec laser diffraction demo

Accessories for inhaler and nebulizer

The Spraytec inhaler and nebulizer accessories offer users the ability to reproducibly measure the particle size distributions of dry powders or droplets produced by metered dose inhalers, dry powder inhalers and nebulizers. Formulations can be quickly checked for the correct dispersion properties, giving researchers the detailed information they need to develop new inhaled drug delivery products.

Nasal Spray Accessory

The nasal spray accessory provides users with the ability to reproducibly measure particle or droplet size distributions generated by nasal drug delivery devices as part of bioequivalence studies or production quality control. Studies can also be conducted to determine how changes in nasal spray device, formulation, or device performance profile may affect the particle size of the spray administered.

wet dispersing accessories

The Spraytec wet dispersing accessory is an economical liquid sample dispersing device designed to measure samples in aqueous or non-aqueous dispersants.

(Video) Measuring Spray Droplet Sizes | WinField United


Protect your investment and ensure optimal performance, every time, with service plans from Malvern Panalytical.

When you purchase a Malvern Panalytical product, we understand that this is only the first phase of a working relationship that will last the lifetime of the instrument. Based on your needs, Malvern Panalytical can support your business.

counseling center

  • Telephone and email support.
  • Operators who are responsible for your call and ensure that your request is answered.


  • user training events.

download the programs

  • A simple mechanism to get updates and new features

Malvern Panalytical Service Options - Choose the plan that's right for you:

Plan Platino de Malvern Panalytical

For labs where maximizing instrument uptime is critical to your daily performance. Our most responsive all-inclusive pricing plan takes care of unexpected repair bills should something unfortunate happen.

Malvern Panalytical Gold-Plan

Improve your lab's productivity while maintaining instrument efficiency. Still, getting this priority answer keeps your instrument's performance on track in combination with expert software and technical support.

Visita Malvern Panalytical Bronze

For laboratories looking to optimize instrument performance, regular preventive maintenance is essential.

Platinum-PlanGolden Planevisit bronze
Annual PM/PV test




Phone/Email Support




priority answer




Emergency visits in case of breakdown*




parts included




Technical and software support




IQ/OQ (Pharma)***




*including labor and travel expenses***Available at extra cost

top applications

The flexibility of the Spraytec system makes it ideal for applications across a wide range of industries, from basic research and development to product quality control and batch release testing.

(Video) Turf Total Spray Droplet Management™ - Video 3, DROPLET SIZES

Provides accurate, reproducible spray size analysis in an easy-to-understand format, improving product understanding and control.

Orally and nasally inhaled drugs

Particle size is a key parameter in defining the deposition pattern and bioavailability of drug materials delivered to the nasal mucosa and respiratory system via sprays and inhalers. The Spraytec system can track size changes during individual device actuations, allowing particle dispersion dynamics to be identified along with device reproducibility. Therefore, formulations can be quickly evaluated for the right spray properties, reducing development times and improving drug delivery efficiency.

Webinar: Administering Nasal Spray Medication

Routine characterization of the atomizer

Measuring the droplet size produced by atomization systems is key to understanding the process and knowing about the environmental impact of spraying, for example in coatings or agrochemical applications.

The Spraytec's robust design, efficient air scavenging and multi-dispersion analysis ensure that measurements at high concentrations can be performed directly in a spray column, providing the real-time data needed to track changes in particle size during atomizer operation.

Application note: Characterization of spray nozzles for specific agrochemical applications

automotive applications

Spraytec's ability to measure at 10 kHz enables the resolution of droplet size variations observed during rapid ignition of automotive fuel injection systems. Providing flexible triggering options ensures that each injection event is fully captured. Atomization repeatability can then be evaluated and related to combustion efficiency.

Application note: Characterization of fuel injectors using high-speed laser diffraction droplet size measurements


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