Ultrasound power output and Radiation Force Balance calibration

Ultrasound power output and Radiation Force Balance calibration

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