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The Hydro Sight™ is a revolutionary accessory for the Mastersizer range of instruments providing rapid visualization and assessment of your liquid particle dispersion during a measurement.


Real-time observation of the particles in the laser diffraction measurement flow allows improved understanding of how stirring and sonication or the addition of surfactants and stabilizers affect your dispersion. One-click capture of dispersion images/videos and dispersion metrics provides quick and effective supporting evidence for troubleshooting measurements and validation of methods according to ISO 13320:2009, USP<429> and similar standards.

  • Visualize your particles
  • Observe and understand dispersion trends
  • Automatically detect unusual particles
  • Evaluate particle size and shape
  • Quickly validate methods

How it works

The Hydro Sight is designed to be used with the Mastersizer instrument range with a recirculating liquid dispersion accessory, such as the Hydro MV, Hydro LV, Hydro EV or Hydro SM accessories provided with the Mastersizer 3000.

Connect the accessory

The Hydro Sight is easily installed by connecting it in-line between the laser diffraction dispersion accessory and  measurement cell. It captures images of the sample dispersion flowing through a specially designed imaging cell using lens-less* dynamic imaging technology. No focusing or calibration by the user is required during routine operation.

Observe and analyze

A stand-alone software package provides image capture and data analysis options with a simple user friendly interface. Image frames are continuously displayed and analyzed during a laser diffraction measurement, with options to save images and follow specific events.  Particle size and particle elongation distributions are updated continuously and a Dispersion Index* trend plot constantly monitors the state of dispersion. Image frames displaying anomalous particles can be automatically captured, assisting with trouble-shooting.

Quickly validate methods

A validated particle sizing method provides security and reassurance that your measurements are robust, repeatable and meaningful. To help you achieve this the Hydro Sight provides rapid, simultaneous visual evidence and supporting data to allow you to arrive at the optimum method in the shortest amount of time. It represents a valuable investment for anybody who regularly needs to develop and validate new methods.

Easy maintenance and cleaning

The Hydro Sight is chemically compatible with a wide range of aqueous and non-aqueous dispersants, and is designed for minimal maintenance under normal operation. The imaging flow cell takes advantage of the clean cycle during your laser diffraction measurements and should not require any extra intervention during routine operation. The cell can be easily accessed  for cleaning if contamination is observed on the cell windows.




Measurement system

Analysis method:
Lens-less dynamic image analysis
CMOS sensor
White light
Data acquisition rate:
3.75 fps
Pixel size:
1.4µm x 1.4µm
Typical measurement time:
as per Laser Diffraction
Materials in contact with the dispersant, additives and sample:

316 stainless steel
BK7 glass
Perlast FFKM

Sample measurement capabilities

Measurement range:
9 - 1000 µm *
Observable Size range:

1.4 - 1000 µm *

(cell width 1500 µm)

System Compliance

Regulatory testing:
Designed to meet RoHS/REACH and WEEE requirements
CE: complies with EMC directive 2004/108/EC {BS EN 61326-1: 2006} and Low Voltage Directive 2006/95/EC {BS EN 61010-1: 2010}
FCC:  CFR 47 Part 15:October 2010 compliant (Class A digital device)
ICES-003 compliant (Class A digital apparatus)
VCCI compliant. 
Designed to meet C-Tick requirements.

General Specifications

200mm x 160mm x 218mm (LxWxH)
100-240V ac 50/60Hz <1A
Supply Voltage:
100-240V, 50-60Hz
Power consumption:
Product storage temperature:
-40°C to +50°C
Operating range:
+10°C to +35°C
80% maximum for temperatures up to 31°C, decreasing linearly to 50% at 40°C.
Non condensing
Ingress Protection (IP) rating:
Designed to meet IP31


* Sample and dispersant dependent

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Demo at your desk: Mastersizer 3000 Webinar - Recorded (English)

This online demo is designed to get you close up and personal with the Mastersizer 3000. You will be given an insider's look at the instrument and its accessories via our lab webcam, and follow the measurement of typical pharmaceutical samples on the...

Mastersizer 3000
Date recorded:
March 22 2016

Interpretación de resultados de tamaño de partícula por la técnica de difracción laser Webinar - Recorded (Spanish)

Difracción láser es una técnica ampliamente utilizada para la medición de tamaño de partícula en materiales que varían entre cientos de nanómetros hasta varios milímetros en tamaño. Es una de las tecnologías más fáciles de entender y obtener resulta...

Mastersizer range
Date recorded:
March 9 2016

Comparing the rheology and particle size of smoothies made with different blenders Application Note (English)

Two smoothie makers have been evaluated and compared by measuring the particle (fiber) size and viscosity of two different smoothies recipes to see which smoothie maker gave the smoothest blend. 

Suspension stability: Why particle size, zeta potential and rheology are important Webinar - Recorded (English)

Suspensions or dispersions of particles or droplets in a liquid medium are encountered in a variety of industries and find use in a diverse range of applications. These include liquid abrasives, ceramics, medicines, foodstuffs and inks to name a few....

Mastersizer range,Kinexus range,Zetasizer range
Date recorded:
February 11 2016

Particle Characterization for Oral Solid Dose Formulations Webinar - Recorded (English)

The particle size and size distribution of the Active Pharmaceutical Ingredients (APIs) and excipients present in Oral Solid Dose (OSD) products are often critical to defining product performance. This is recognized by ICH Q6A, which recommends that ...

Mastersizer range,Morphologi range
Date recorded:
February 9 2016

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