Vaisala - Company Announcement

Correction: Vaisala's January - December 2011 results published on February 9, 2012

Vaisala Corporation Stock Exchange Release February 3, 2012 at 5:15 pm

Correction to the English version of the stock exchange release published today.
The correct date for Vaisala's Q4/2011 and year 2011 financial statement release
is Thursday, February 9, 2012.
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Vaisala publishes the Q4/2011 and year 2011 financial statement release on
Thursday, February 9 at 9:00 a.m. The stock exchange release will be available
on the company website atwww.vaisala.com. CEO's presentation will be published
at 12:00 noon (GMT +2) on the same day at www.vaisala.com/investors.

Briefing
Briefing for analysts and media will be arranged in Tapahtumatalo Bank,
Unioninkatu 20, 00130 Helsinki, starting at 12:00 noon (GMT +2). A light lunch
will be served. Please register by email tohelena.marjaranta@vaisala.com.

Webcast
A live webcast of the presentation of Kjell Forsén, President and CEO of
Vaisala, will be sent starting at noon (GMT +2). The webcast will be available
atwww.vaisala.com/investors. It will be recorded and published at the same
address by 2:00 p.m. (GMT +2) on the same day.


More information: Helena Marjaranta, SVP,
Communications,helena.marjaranta@vaisala.com, tel. +358 40 581 9102




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Vaisala is a global leader in environmental and industrial measurement. Building
on 75 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 chosen weather-related and industrial markets.
Headquartered in Finland, Vaisala employs approximately 1400 professionals
worldwide and is listed on the NASDAQ OMX Helsinki stock exchange.



Distribution:
NASDAQ OMX Helsinki
Key media
www.vaisala.com




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