Precision Acoustics manufactures Radiation Force Balances and Check Sources which can be used to measure ultrasound power according to the IEC Standard 61161. All products are supplied with a calibration from The National Physical Laboratory, LONDON.
The bounded output mask provides a means of ensuring that measurements of TI according to IEC 62359 can satisfy the requirement of only determining the ultrasonic output through an area of 1 cm x 1 cm.