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Solving a common problem

With many reaction processes it is necessary to perform frequent testing of the process to determine when the end-point has been reached. Inaccurate, or infrequent testing, can produce poor prediction of the end point of the process resulting in sub standard products. Many laboratories still use a standard manual laboratory test for the viscosity, which can result in poor repeatability, substantial man power loading when frequent testing is required. Manual testing will typically only be able to produce results at 15 minute intervals, which is much too long for many reactions and processes. 

The payback

The P1 will produce results on a continuous basis with high accuracy and repeatability. With a response time of only ten seconds, reaction processes can be accurately monitored and logged. An alarm can be set to indicate that the product is heading off spec. Precise definition of the end-point is achievable every time and so scrap and sub standard produce is avoided. In today’s increasingly competitive market, achieving quality will reap its just rewards. 

The response Time

The P1 has rapid response and will spot 98% of any step change in the reactor in just 10 seconds. 

The principle of operation

The principle of the P1 is a piston displacer, which draws off liquid from the reaction vessel, or process line and it is then temperature conditioned to a high accuracy in a single heat exchanger which has a low volume but a high surface area. The temperature can be conditioned up or down. The fluid is then passed to a capillary to be measured and the viscosity calculated. The cycle time of the viscometer can be set from 10 seconds upwards.
The precision construction of the P1 enables it to fully prime its self even when drawing from almost absolute vacuum in its reactors. The piston is driven by a ball screw jack and can produce pressures at the entrance to the capillary of 100 bar (1500 psig) which gives a very wide range of shear rate. 

Computer Control

There is a comprehensive range test of conditions which can be set up. The user interface is via a VDU and simple keypad. There are a range of powerful software functions which, for example, enable non-Newtonian liquids to be characterised against true shear rates. The results are displayed in as a single plot graph and as a hard copy. There are facilities for historical trend analysis and data storage. The results can also be passed to other computers as a serial stream by means of an intelligent programmable serial interface, which is included as standard. Relaxation studies can also be made to indicate viscoelastic properties. 

Full Characterisation

Specification 

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