Vaisala Oyj

Annual / Quarterly Financial Statement • Feb 3, 2010

Disclosure 275568

Vaisala - Company Announcement

Preliminary information on Vaisala's financial statements for year 2009

Vaisala Oyj Stock exchange release 3 February 2010 at 10:10 am As stated earlier, our view is that net sales in 2009 will be slightly lower than in 2008, being approximately EUR 232 million. Vaisala estimates the operating profit to be approximately EUR 12 million and the earnings per share EUR 0.38. The operating profit is affected by declined gross margin due to the lower net sales, extra costs of some delivery projects, strategic, growth oriented efforts and one-off costs associated to the acquisition of Quixote Transportation Technologies at the end of 2009. The numbers stated here are unaudited and not based on financial statements signed by the Board of Directors. Vaisala Oyj's financial statements for 2009 will be published on 19 February 2010. Further information: Jouni Lintunen, CFO, +358 9 8949 2215, gsm +358 40 579 0181 Vaisala Oyj Distribution: NASDAQ OMX Helsinki Main media [HUG#1380057]