Director/PDMR Shareholding

Oxford Instruments plc                             

                              Directors' Dealings                              

Oxford Instruments plc announces that on 5 November 2010 the following
executive directors applied dividends paid on shares held in the Oxford
Instruments Share Incentive Plan to purchase ordinary shares of 5 pence at a
cost of 519.37p per share as "dividend shares" under the all-employee Oxford
Instruments Share Incentive Plan as summarised below:

       Executive Director             No. of Dividend Shares acquired      
                                                                           
           Kevin Boyd                                25                    
                                                                           
         Jonathan Flint                              25                    
                                                                           
        Charles Holroyd                              25                    

The above transactions were undertaken by the trustee of the Oxford Instruments
Share Incentive Plan, a UK registered company, on behalf of the above
individuals and the shares were purchased on the London Stock Exchange.

The above notifications are made in accordance with Rule 3.1.4 of the UKLA
Disclosure Rules and Transparency Rules.

Oxford Instruments plc was notified of the above transactions on 10 November
2010.

Name of contact and telephone number for queries: Susan Johnson-Brett, 01865
393324.

For and on behalf of Oxford Instruments plc

Date: 12 November 2010