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Instrument Combinations

Versatile Density Meter and Refractometer Instrument Combinations from Rudolph Research Analytical.

Combined Density – Refractive Index instruments Many users need to measure both refractive index and density and feel that a combined system will be a good alternative.  The advantages of such a system are many;
  • Since parts are shared the total cost of the system may be less.
  • There may be less operator time needed to load and clean the system.
  • Many laboratories combine the density and refractive index results and use them to calculate a third parameter.  Having both results exported into the same file makes the calculations easier.

Product Category: Autosamplers, Density Measurement, Polarimeter, Refractometers

Industry: Food, Dairy and Wine, General Laboratory, Pharmaceutical, Personal Care and Natural Products

Supplier: Rudolph Research Analytical


See the Rudolph Density Meter combined with a Peristaltic Pump , Density Measurements for high throughput labs!

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The instrument combination systems offered by Rudolph are as follows;

Basic – Density Meter and Refractometer Optics Module Box

Description: This system is the optic module from a Rudolph Refractometer attached to a Rudolph Density Meter. The user loads and cleans each measurement system exactly the same way they do with two separate instruments.
Who should consider this system?

  • A smaller laboratory that does not have many samples. The ability to share a common screen means a combined system like this has a significantly lower cost than two separate instruments.
  • A laboratory that wants to combine density results with refractive index results and calculate a third parameter from them.

Density Meter and Refractometer


Basic Density Meter and Refractometer Optics Module Box with flow through sample injection.

This system is similar to the one above but uses the DP (Dual Purpose) optics module. Primarily offered as a bridge between manual and automatic sample loading. Users can load samples in fully manual mode or via a Syringe.
Who should consider this system?

  • A laboratory that plans on automating at a future time. With the cover and stand removed this system can be used exactly like the basic system above. With the cover and stand attached the system is ready to be attached to an automatic loading and cleaning system
  • A laboratory that wants to integrate with external equipment for example a sampling system from a pilot plant reactor
  • Wants to use a minimum volume of sample for 2 or more measurement results
  • A laboratory measuring a highly evaporative sample

Density Meter, Refractometer OMB, DP

Sample Loading and Cleaning in Manual Mode.

Sample loading - Manual

Sample Injection and Cleaning in Syringe Mode.

Density Meter - Refractometer - Sample injection


Density Meter, Refractometer Optics Module Box with Peristaltic pump system

Description: The most basic of the fully automatic systems. The user drops a sipper tube into the sample and the pump sucks the sample through both instruments and then measures. The measured sample is then displaced by the following sample.
Who should consider this system

  • Users measuring low viscosity samples such as beverages
  • Users who don’t mind needing 50ml of sample for measurement.
  • A high throughput laboratory making many measurements each day

Density Meter, Refractometer, Peristaltic Pump


Density Meter, Refractometer Optics Module with a Rudolph Easy Clean System

This system is the most versatile. The user loads the sample in a similar way to the peristaltic pump system but after measurement the instrument rinses with two solvents and then dries with air from the included pump. The system can also be quickly disassembled and used in manual mode.
Who should consider this system

  • Users who only want to use a small amount of sample
  • Users with samples that have too high a viscosity to be pumped with a peristaltic pump.
  • Users with samples that are difficult to clean
  • Laboratories measuring dissimilar samples requiring a thorough cleaning between samples.

Density Meter, Refractometer, ECS System


All Rudolph Instruments carry our exclusive 20 Commitment to service your instrument.

Rudolph Research Analytical offers a comprehensive range of Preventive Maintenance and Service Programs. Rudolph has demonstrated a commitment to its customers by keeping installed instruments operational, not only for 20 years, but in some cases for over 40 years. This long-term commitment to keeping our instruments running makes the cost of ownership, over the life of a Rudolph Instrument, one of the lowest in the laboratory market segment. At the date this document was published, there is no other laboratory instrument manufacturer guaranteeing service and technical support for 20 years. View the entire 20 Service Guarantee. 

Scientific Solutions

Scientific Solutions have been providing carefully selected laboratory and analytical equipment to Australian Industries such as Environmental, Pharmaceutical, Food and Beverage and Research markets of the Science Industry for over a decade.

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