Director/PDMR Shareholding

NOTIFICATION OF TRANSACTIONS OF DIRECTORS' DEALINGS

Oxford Instruments plc (the "Company") announces that on 30 September 2010 the
following directors' dealings took place:

Charles Holroyd, Executive Director, exercised options granted under the
Company's Executive Share Option Scheme over 12,931 ordinary shares of 5p each
at an option price of 232p per share. This represents 0.026% of the Company's
issued share capital. He then sold 6,016 shares at 500.45p per share to meet
the option price and other costs arising from this transaction. He has retained
6,915 shares.

Following this transaction, Charles Holroyd's shareholding in the Company is
now 58,437 shares, representing 0.12% of the issued share capital.

This notice is given in fulfilment of the obligations under DTR 3.1.4R(1)

Susan Johnson-Brett

Company Secretary

Oxford Instruments plc

Tel: [phone]

Email: [e-mail]

1 October 2010