Oxford RF Sensors Ltd. - PRODUCT NEWS

Oxford RF Sensors breaks new ground in
fluid monitoring with ‘intelligent dipstick’.

As part of its programme of development of real-time, in-situ fluid monitoring systems for high volume applications, Oxford RF Sensors (ORFS) has developed a self-calibrating sensor that provides simultaneous measurement of fluid level and fluid condition.

ORFS uses a novel RF sensor technology, developed at the University of Oxford, to solve sensor challenges facing leading manufacturing companies.

“Can you work with us to design a sensor that will measure fuel level and contamination in diesel generators?” asked the CEO of an ORFS partner company. “Our problem is that it is all too easy for fuel to be stolen from diesel generators. Thieves have ingenious ways of hiding the theft by substituting anything from water to cooking fat, so it goes undiscovered until the generator comes to a grinding halt.”

Using its patented sensor technology, ORFS is well advanced in developing a bespoke ‘intelligent dipstick’ for the application that will offer:

Self-calibrating fluid level measurement, independent of changes in temperature and composition, to an accuracy of 0.1%; and

Measurement of changes in fluid composition to 100 ppm.

Other high-volume applications for fluid monitoring under development by ORFS in collaboration with industrial partners include the measurement of oil level and condition in diesel and petrol engines, urea volume and quality in diesel trucks and water level and phase (solid/liquid) in aircraft fuel tanks.

Sensor designs include both rigid and flexible probes that can measure level or volume in irregular shaped tanks. The sensors are configured to provide specific information on fluid condition, for example detecting water contamination or specific chemical changes such as oxidation. And, with minimal power requirements, the technology is ideally suited to remote monitoring using wireless telemetry.

“The secret lies in ability of the ORFS sensor simultaneously to interrogate both the real and imaginary parts of the liquid’s electrical permittivity. By selecting appropriate frequencies, it is possible to detect changes in composition as well as solve complex measurement problems,” says Ross Walker, CEO.

For more information, please contact :-

Ross Walker
Oxford RF Sensors Limited
Tel: +44 1865 331000
Email: ross@oxfordrfsensors.com
Web: www.oxfordrfsensors.com

September 2006

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