A new generation of online differential viscometers.
On-line differential viscometer with unparalleled signal-to-noise ratio, low baseline drift and noise. Accepts external signals for zero, purge, and recycle. Ethernet and USB communications, full color LCD display conveys data at a glance. Transducer Protection System (TPS) and user-selectable delay volumes also included!
Wyatt Technology in collaboration with Professor Skip Rochefort's group at Oregon State University used a DAWN EOS, an Optilab rEX and a ViscoStar to measure the intrinsic viscosity and Mark-Houwink-Sakurada (MHS) behavior of Hyaluronic Acid (HA). Unusual MHS behavior was demonstrated, perhaps helping explain the large variation in HA MHS coeffiecents that have been reported in the literature. Click on the icon to download the paper.
If you'd like to get an idea of the power of Wyatt's ASTRA V software for viscosity measurements please visit our ASTRA V Data Analysis Section.Click Here!
Wyatt Technology is the world leader in providing the most advanced macromolecular and nanoparticle characterization tools. These instruments and software may be used to determine the absolute molecular weight and or size of macromolecules and nanoparticles and include: multi-angle light scattering, dynamic light scattering, high through-put dynamic light scattering, field flow fractionation, refractive index and viscometry detection.
Maximum flow rate: 1-3mL/min (solvent dependent)
Can be set with 3 different delay volumes
(27 mL, 12 mL, 4 mL)
Measurement precision: 18 bits
Linearity: 0.5% of full scale
Integration time: Programmable from 0.1 sec to infinity
in increments of 0.1 sec
Maximum inlet pressure: 220kPa (31.9 psi)
Maximum system pressure: 690kPa (100 psi)
Maximum differential pressure: 5kPa (0.725 psi)
Maximum differential pressure noise: < 0.15 Pa (2.2E-5 psi)
Maximum differential pressure drift: < 2.5 Pa/hr (3.6E-4 psi/hr)
Capillary dimensions: 0.25mm ID x 660mm
Sample shear rate: 5000 Hz*
Cell volume: 33 μL / bridge arm
Sample temperature control range: 4ºC–60ºC, temperature regulated
Temperature stability: < 0.01C
2 analog output signals: Inlet pressure and differential pressure
Digital communications: Ethernet
Universal power input: 90-250VAC 50-60Hz
Display/User interface: 162.5mm 16-bit color high resolution LCD
Auto-inject contact closure input Allows multiple instruments to share with retransmit: a singlesynchronization signal
Transducer Protection System (TPS): Protects from over-pressure
External recirculation valve option: Allows software control solvent recirculation
Safety sensors: Vapor alarm for organic solvents and leak
alarm for aqueous solvents
External alarm input: Allows a remote instrument to signal an alarm
Ambient temperature range: 0-40ºC
Dimensions: 168 mm x 357 mm x 595 mm (H x W x D)
Weight: 11.5 kg
Wyatt Technology is the recognized leader in light scattering instrumentation and software for determining the absolute molar mass, size, charge and interactions of macromolecules and nanoparticles in solution. These tools include: in-line multi-angle static light scattering, high-throughput dynamic light scattering, differential refractometry, electrophoretic mobility, differential viscosity, field flow fractionation and automated composition gradients.