National Physical Laboratory

Ultrasonic pressure standards

The NMS primary standard for hydrophone calibration, the laser interferometer, will continue to be provided, alongside measurement facilities used to disseminate hydrophone calibration services to the user community.

New services will be developed to keep pace with the continued development of the membrane hydrophone as the reference wide bandwidth measurement device, in particular to extend the frequency ranges to in excess of 60 MHz, and also to less than 200 kHz.

NPL will maintain its involvement in developing standards with the International Electrotechnical Commission, and will also pilot the forthcoming CCAUV Key Comparison for ultrasonic hydrophone calibrations.

For more information: Bajram Zeqiri

Last Updated: 30 Mar 2012
Created: 29 May 2007


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