Director/PDMR Shareholding

Oxford Instruments plc                             

                              Directors' Dealings                              

Oxford Instruments plc announces that on 29 November 2011 the following
executive directors purchased ordinary shares of 5 pence at a cost of 994.5p
per share as "partnership shares" under the all-employee Oxford Instruments
Share Incentive Plan as detailed below.

In connection with the above purchases of Partnership Shares on the same date
the executive directors were awarded ordinary shares of 5 pence as "matching
shares" under the all employee Oxford Instruments Share Incentive Plan as
detailed below. To fully hedge the above awards the Trustee of the Oxford
Instruments Share Incentive Plan purchased such number of shares in the open
market at a cost of 994.5p per share.

The risk of forfeiture attached to the matching shares will normally be removed
on the third anniversary of allocation subject to continued employment and the
retention of the partnership shares in connection with which they were awarded.
No consideration was paid by the grantees for the award of the matching shares
and no consideration is due on the release of the matching shares.

On the same date, the 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 994.5p per share as "dividend shares" under the all-employee
Oxford Instruments Share Incentive Plan as detailed below.

Executive Director    No. of Partnership     No. of Matching  No. of Dividend  
                        Shares acquired      Shares awarded    Shares acquired 
                                                                               
    Kevin Boyd                13                    3                16        
                                                                               
  Jonathan Flint              13                    3                16        
                                                                               
  Charles Holroyd             13                    3                16        

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 30 November
2011.

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

For and on behalf of Oxford Instruments plc

Date: 1 December 2011