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Microprocessor Controlled Density Gradient Filling System

Ray-Ran's Computerised Density Gradient filling System for Density Gradient Columns with digital readout of densities to the ASTM D 1505 and ISO 1183 Standard




The System offered is by far the most accurate way of producing a density gradient within your column. Not only does it effortlessly integrate with the Ray-Ran 3 and 6 column equipment but can also be used with any other make of density gradient column. It saves considerable time in the preparation and building of your density gradient and overcomes a lot of the trial and error that is associated with this procedure.


Buffer zones can be added to the top and bottom of the column to slow down the deterioration of the column and gradient settings can be stored for future use including controlled top and bottom densities, column volume, tube volume and buffer volumes as well as selectable density units, with either g/ml or kg/m3 available.

The filling procedure is fully automated using indexing stepper motors and peristaltic pumps and any two miscible liquids can be used to give the heavy and light densities without the need to be pre-mixed prior to being pumped into the column.

Weight:  6.1 kg

Dimensions:  350x240x180 mm (WxDxH)

Power:  110-240VAC, 50-60hz

Display:  Large Touchscreen

Weight:  6.1 kg

Dimensions:  350x240x180 mm (WxDxH)

Power:  110-240VAC, 50-60hz

Display:  Large Touchscreen

Features & Benefits

Small footprint filler unit with basic operating panel

Touchscreen Display

Fully programmable Column volume, and upper and lower densities

More accurate and consistent than other filling methods

Variable speed pumped filling system

No need to premix liquids

g/ml or kg/m3 units

Variable top and bottom buffer volumes

Previous stored filling routines

Automatic density calculation

Mains lead

5mtrs of 4mm tubing supplied

Weighted end for the outlet tube

Spare pump tubes & connectors

110v – 240v 50 – 60Hz

Product user manual

CE declaration certificate

1 year return to base warranty