Laray Viscometer T

The IGT Laray Viscometer measures the viscosity of viscous materials, especially of varnish, high viscous oils and paste printing inks between 2 and 200 Pas. In principle, it measures the relative viscosity of two parallel surfaces, separated by a thin film of the measured material when a certain force (weight) is applied on the rod. This movement is hindered by the viscosity of the measured material; the falling time is measured with different weights.

Used in: Ink making, ink mixing raw materials (quality control)

Properties
Measures viscosity according to the falling rod principle
Conforms to ISO 12644 or DIN 53222
Measures a time to fall of viscous fluids between two points with a distance of 100mm
Dimensions of the rod and collar are very accurate
Both rod and collar are temperature controlled by means of a water bath.

The unit is delivered with a Laray rod with standard base weights of 100g and 500g plus addition weights/ringweights of 50g, 100g and 200g. This makes it possible to add weights between 100 – 1000g in steps of 50g.

Supplied with PC data transfer and viscosity calculation software.

Operation

Automated Laray Viscometer

When switching on the Laray Viscometer, the measuring mode of the instrument is indicated by a red LED light. The rod holder is brought into a horizontal position by using a lever.  After this the rod is thrust in under a slight rotation through the tube up to the limit stop of the rod holder.

The conical surface of the top of the proofing ring can now be filled with the liquid to be measured. It is important to continuously rotate the rod to cover all the surfaces. After resetting the timer the measuring procedure can be started. This is done by releasing the rod holder by rotating the lever. The rod slides through the tube and passes the precision sensors. The travel time between the two sensors is measured. The results are then put in a viscosity diagram with the help of the viscosity calculation software.

A minimum of four measured points with different weights as required.

For further information,