NANOSONICS LIMITED — Board/Management Information 2011

May 15, 2011

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16 May 2011

Company Announcements Office Australian Securities Exchange

Nanosonics Management Changes

Following consultation with the Board of Nanosonics Limited (ASX: NAN), David Radford has tendered, and the Board has accepted, his resignation as a Director and Chief Executive Officer. Details of David Radford’s departure are yet to be finalised and all parties are working collaboratively to ensure a smooth transition.

The Board of Nanosonics is pleased to announce that Dr Ron Weinberger, currently a Director of the Company will be appointed as Interim CEO. Dr Weinberger has been instrumental in leading the development of both the Company’s platform technologies and the roll out of its flagship Trophon EPR™.

Dr Weinberger and his team is currently in the USA working with GE in finalising the marketing technical and support plans for the imminent US launch of the Trophon EPR™.

As reported previously (ASX 12 April 2011) the Company’s senior management team has been significantly enhanced with the appointment of highly experienced executives, McGregor Grant as CFO and Gerard Putt as head of Manufacturing.

Nanosonics is confident that its leadership team with the support of the Board is well positioned to drive the growth of the Company into the lucrative North American market and an ever increasing range of global markets beyond.

Maurie Stang Chairman