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ATEX meters / controllers for mass flow and pressure

17 July 2009

Bronkhorst High-Tech has introduced a line of pressure meters/controllers and liquid flow meters/controllers suitable for use in Zone 2 hazardous areas, due to their ATEX category 3 approval. Both series are equipped with a rugged, industrial style (IP65) electronics housing.

ATEX meters / controllers for mass flow and pressure
ATEX meters / controllers for mass flow and pressure

The instruments are based on the successful El-Press and Liqui-Flow series. They are equipped with a pc-board for both analog and digital communication. The main pc-board can be easily extended with an interface board for DeviceNet, Profibus-DP, Modbus-RTU or FLOW-BUS. Several alarm, counter and diagnostic functions are available as a standard. For users of digital instruments Bronkhorst offers free, easy-to-use software for configuration, monitoring and operation.

The pressure meter/controller is equipped with a diaphragm type piezo-resistive pressure sensor, suitable for pressures from 2…100 up to 8…400 bar. By utilising the integrated PID-control function the desired pressure, upstream or downstream, can be controlled with an integrated control valve or a close-coupled valve. The control stability is better than 0.1%!

These instruments are available for flow rates from 0.25 g/h up to 1000 g/h, with a pressure rating of 100 bar. Eight calibration curves for different media can be stored on the pc-board. The accuracy is better than 1% FS and the response time for the controller is less than 2 seconds.

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