Precise dosage

Published: 9-Feb-2004


Bronkhorst claims to have solved the problem of simple, controlled liquid dosing at very low flow rates, with its new LIQUI-FLOW pump controller. Frequently required for precise automated mass flow control of reactants, additives or catalysts in food, chemicals and pharmaceutical applications, the LIQUI-FLOW pump controller provides in one simple combination a close coupled mass flowmeter and pump, which accepts analogue or digital signals defining the required mass flowrate. Using a pulsation-free rotary positive displacement pump, the unit avoids the normal problem of the pulsating flow pattern produced by most low-flow pumps, making it unnecessary to use tanks pressurised with inert gas or similar techniques. Suitable for all low viscosity fluids, the unit provides the necessary control function, using the standard control logic of all Bronkhorst mass flow controllers. Digital communications can be RS232, or can use the on-board fieldbus interfaces to Profibus-DP, DeviceNet or Flow-Bus. Standard LIQUI-FLOW pumps can be offered in the range from 10-500gm/hr, other ranges are available.

T: +44(0)1223 833222 sales@bronkhorst.co.uk

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