Director/PDMR Shareholding

Oxford Instruments plc                             

          Notification of transactions by PDMR and Connected Persons           

On 29 November 2012 certain purchases and awards of ordinary shares of 5 pence
each in the capital of Oxford Instruments plc (the "Company") were made under
the all-employee Oxford Instruments Share Incentive Plan (the "SIP") including
by and to the following Executive Directors (PDMR) and Connected Person as
follows:

    Executive Director       No. of shares   No. of shares  No. of Dividend  
                             acquired as      awarded as     Shares acquired 
  (or Connected Person as     Partnership   Matching Shares                  
         relevant)              Shares                                       
                                                                             
        Kevin Boyd                10               2               14        
                                                                             
      Jonathan Flint              10               2               14        
                                                                             
      Charles Holroyd             10               2               14        
                                                                             
      (Claire Flint)               2               1                0        

Claire Flint is a Connected Person to Jonathan Flint by way of marriage.

The Partnership Shares and Matching Shares were acquired at a cost of £13.28
each. The Matching Shares are subject to a risk of forfeiture which will
normally be removed on the third anniversary of award subject to the
participant's continued employment and the retention of the linked Partnership
Shares. No consideration was paid by the participants for the award of the
Matching Shares and no consideration is due on the release of the Matching
Shares or in relation to Partnership Shares and Dividend 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 £13.28 per share as "dividend shares" under the all-employee
Oxford Instruments Share Incentive Plan as detailed above.

The above transactions were undertaken on behalf of the above individuals by
the trustee of the SIP 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
2012.

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

For and on behalf of Oxford Instruments plc

Date: 3 December 2012