Vaisala Oyj

Report Publication Announcement • Jul 27, 2009

Disclosure 271677

Vaisala - Company Announcement

Vaisala's January - June (Q2/2009) results published on August 11, 2009

Vaisala Stock Exchange Release 27.7.2009 at 1.30 pm Vaisala's January - June (Q2/2009) results published on August 11, 2009 Vaisala publishes its Q2/2009 results on Tuesday, August 11, 2009 at 9 am. The stock exchange release will be available on the company website at www.vaisala.com. CEO's presentation will be published at 11.00 am (GMT +3) on the same day at www.vaisala.com/investors. Briefing Briefing for analysts and media will be arranged in Hotel Kämp, Paavo Nurmi meeting room, Pohjoisesplanadi 29, starting at 11.00 am. Please register to the briefing by email to Liisa Ahtiluoto, liisa.ahtiluoto@vaisala.com. Audiocast A live audiocast of the presentation of Kjell Forsén, President and CEO of Vaisala, will be sent starting at 11.00 am (GMT +2). The audiocast will be available at www.vaisala.com/investors. It will be recorded and published at the same address at 1.00 pm (GMT +2) on the same day. More information: Liisa Ahtiluoto, Communications Manager, tel. +358 40 730 7695 --------------- Vaisala is a global leader in environmental and industrial measurement. Building on more than 70 years of experience, Vaisala contributes to a better quality of life by providing a comprehensive range of innovative observation and measurement products and services for meteorology, weather critical operations and controlled environments. Headquartered in Finland, Vaisala employs over 1200 professionals worldwide and is listed on the NASDAQ OMX Helsinki. www.vaisala.com