Digital laboratory refractometers from A. Krüss

Optronic are setting new benchmarks on many counts.

An intuitive touchscreen presents a clear overview of alldata and functions and the integrated SQL database stores all data and allows external access via a network or standalone PC.

The refractive index can be a parameter in quantitative or qualitative analysis and quality assurance. Degrees of polymerisation can also often be monitored frequently, quickly and cost-efficiently without turbidity or the colour of the sample affecting measurement precision.

There is no longer any elaborate preparation of samples necessary. The sample is simply placed on the measuring prism and the measurement process is started.

The flat stainless steel plate is easy to clean and is highly resistant to aggressive substances.

As the refractive index depends on the temperature of the sample, the refractometer should be tempered.

The DR6000 series is thus available with integrated electronic temperature control by means of a Peltier element. This type of temperature control is faster and more reliable than previous water bath thermostats which

can be connected to the digital refractometer without Peltier temperature control. It is thus possible to carry on using an existing thermostat. For continuous measurements or series of measurements with many samples and

high volumes of samples, devices with flow measurement cells are available. A sample can thus displace the previous one, nonetheless achieving an accurate measurement result without cleaning the measuring prism after

every measurement. If a printer is connected to the RS-232 interface, the measurement result can be printed out either directly after the measurement or later.

All stored measurement data can also be filtered according to different criteria and exported to a USB stick in.XLS (Excel) or .CSV format.


The integrated SQL database stores up to 99 user-defined measurement methods and the last 999 measurement results with all relevant data, such as date, time and user.
An optional user management system with three authorisation
levels safeguards the settings against any inadvertant changes. The DR6000 series thus complies with all GLP requirements and is ideally suited for use in FDAregulated areas. Refractometers can be connected to a PC via an Ethernet interface or integrated in an existing network. If there is access to the Internet, remote maintenance and fault diagnostics are also possible. DR6000 refractometers are sturdy, low-maintenance and also extremely quiet - a quality which is often underestimated when it comes to constant use in a laboratory.

Our new KrüssLab software offers you ideal administration of your Kruess instruments: refractometers, polarimeters and density meters can now be comfortably remote-controlled.

After an easy software installation via Windows Explorer, a set of function blocks provides administration, remote control and measurement reading from your central work station.

Your instrument can either be connected via an ethernetcable to your intranet, or directly to your PC. It is identified via its personal IP-address. Our lab software reflects the intuitive touchscreen from your Kruess instrument, and it can be run directly from your PC.

Your measurements are imported directly from the instrument, and remain stored locally in the database.

In this way you can also work with your data when your Kruess instrument is turned off.

Using various data filters, you can export exactly the data needed in an excel or HTML file to your printer or as a PDF document. It’s now possible to run an unlimited number of Kruess instruments centrally, your work is made easier and you will have a better overview of your processes.