NANOSONICS LIMITED — Director's Dealing 2011

May 8, 2011

Rule 3.19A.2

Appendix 3Y

Change of Director’s Interest Notice

Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX’s property and may be made public.

Introduced 30/9/2001.

Name of entity	Nanosonics Limited(ASX Code: NAN)
ABN	11 095 076 896

We (the entity) give ASX the following information under listing rule 3.19A.2 and as agent for the director for the purposes of section 205G of the Corporations Act.

Name of Director	Maurie Stang
Date of last notice	8 June 2010

Part 1 - Change of director’s relevant interests in securities

In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust

Note: In the case of a company, interests which come within paragraph (i) of the definition of “notifiable interest of a director” should be disclosed in this part.

Direct or indirect interest	Direct interest
Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest.	Indirect shares held in the names of Novapharm Research (Australia) Pty Ltd and Epitek Corporation Pty Ltd
Date of change	2 May 2011
No. of securities held prior to change	Direct: 28,307,756 ordinary shares Indirect: 116,368 ordinary shares
Class	Fully paid ordinary shares
Number acquired	Nil
Number disposed	33,334 ordinary shares
Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation	$6,266
No. of securities held after change	Direct: 28,274,422 ordinary shares Indirect: 116,368 ordinary shares

Appendix 3Y Change of Director’s Interest Notice

Nature of change Fo u nder opti o ns have been exercised ove r 33,334 Example: o n-market trade, of f -market trade, exer c ise of (0. 1 2%) of Mr Stang’s sh a res. This particular change in options, isplan, parti cs ue of securities unipation in buy-bac kd er dividend reinve s tment hol d ing was instigated by a long - standing h older of Fo u nder opti o ns, whic h were cr e ated by d eed on 25 March 2007, i.e. b e fore the C ompany’s IPO on 17 May 2007. Details of Founder o p tions are s et out in se c tion 12.4 of the Company’s Pros p ectus dat e d 2 April 20 0 7, a copy of which i s available on the Na n osonics we b site: www . nanosonic s .com.au.

Part 2 – Change of director’s interests in contracts

Note: In the c ase of a company, interests which co m e within paragrap h (ii) of the definiti o n of “notifiable int e rest of a director” s hould be disclose d in this part.

Detail o f contract	Non e
Nature of interest
Name o (if issue f registered h d securities) older
Date of **change **
No. and interest Note: Detai which the i class of secu related prio ls are only required nterest has changed rities to whic r to change for a contract in re h lation to
Interest acquired
Interest disposed
Value/C Note: If con estimatedv onsideration sideration is non-c aluation ash, provide details and an
Interest after change

Appendi x 3Y – 2 May 2011 M Stang

+See cha p ter 19 for d e fined terms 11/3/2002

Appen d ix 3Y Page 2