Director/PDMR Shareholding

Oxford Instruments plc                             

          Notification of transactions by PDMR and Connected Persons           

On 22 April 2013 certain purchases 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 Dividend  
                            Shares acquired  
 (or Connected Person as                     
        relevant)                            
                                             
        Kevin Boyd                 6         
                                             
      Jonathan Flint               6         
                                             
     Charles Holroyd               6         

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 £15.18 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 23 April 2013.

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

For and on behalf of Oxford Instruments plc

Date: 23 April 2013