George Fischer Takes Channel Fluid Measurement To New Level

Liquid volumes and flow rates can be continuously monitored using sensitive yet rugged new sensors which have recently been added to the range of piping systems specialist, George Fischer.

The new Type 2270 Ultrasonic Blind Sensor and Type 2260 Ultrasonic Display Sensor have been designed to offer both ease of installation and use, as well as a long low maintenance life, and will find applications in the water, sewage treatment, chemical, manufacturing and (food?) processing industries. They are also suitable for measuring flows in culverts and spillways where flood monitoring is a priority.

The sensors can be used in such roles as for calculating the dosage of chemicals required to control the pH value of a flow, for the accurate filling of storage tanks and in specialist treatments such as electro-plating. The various sizes and outputs of the 2270 and 2260 models operate on the 'time of flight' principle where a sound wave is transmitted from a point above the fluid surface and the time for the return signal to be received measured.

This provides a reading of the level for the surface to an accuracy of +/- 0.2% of flow, with the sophistication of the technology enabling them to allow for wave height or the presence of dust and grease contamination. The sensors can further recognize and allow for 'disturbing objects' such as mixing paddles or ladders mounted on the side of tanks.

The sender unit emits a narrow beam of sound to offer very good echo densities - which can therefore cope with light foaming of the liquid - while the user can also pre-program in different tank or channel shapes to facilitate the calculation of volumes. The construction of both units features the choice of polypropylene and PVDF materials for the casings, giving good resistance to aggressive environments and ease of cleaning.

The displays on the 2270 and 2260 are large and easy to read, while they use a 4-20 mA signal strength to communicate with central monitoring devices, HART modem or process control systems. The 2270 can offer operating ranges of four or six metres while the 2260 encompasses models able to work up to a distance of 15 metres. Both can be used in proximity of process temperatures between -30 and + 90 degrees centigrade, while all units carry ATEX, CE and RoHs accreditation.

Overall the design of the new sensors from George Fischer can simplify the measurement of volumes and flow rates with a standard of accuracy and reliability which can offer the potential to improve quality or save on dosing chemicals. The new Type 2270 Ultrasonic Blind Sensor and 2260 Ultrasonic Display Sensor sit within George Fischer's level measurement portfolio primarily as non-contact devices ideal for use in large tanks and with aggressive chemicals.

The manufacturer provides a full technical advisory service to assist with specification and correct siting of the sensors, while a wide selection of ancillary components are available to ensure installation is completed quickly and successfully.

For further information please email George Fischer Sales Ltd

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