NPL can measure the output power generated by transducers and reference sources, such as those produced by NIST and Precision Acoustics, to standard IEC 61161:

• Over the range 1 mW to 20 W, between 1 MHz and 20 MHz, using radiation force balances
• At HIFU levels (reaching over 300 W), typically between 1 MHz and 5 MHz, by the buoyancy change method based on the thermal expansion of castor oil

Power measurement devices can be calibrated for power levels up to:

• 1 W by comparison with our Primary Standard Balance, for frequencies up to 25 MHz
• 20 W by comparison with our Secondary Standard Balance, for frequencies up to 5 MHz

Contact

Customer Service tel: +44 20 8943 8631
E-mail: acoustics_enquiries@npl.co.uk