Vaisala - Company Announcement

Preliminary information about second quarter net sales and result as well as full year result

Vaisala Oyj   Stock exchange release   June 23, 2010   at  09.30 a.m.

Vaisala expects its net sales to be at the same level as or slightly lower in
the second quarter of 2010 than the corresponding period in 2009. The result is
expected to be clearly unprofitable.

The net sales and result are mainly affected by the temporary delays in
shipments caused by efficiency measures implemented in May-June. The result of
the second quarter is also affected by approximately EUR 3 million one-off costs
from the ongoing profitability program that were communicated on June 17, 2010.
The above-mentioned one-off items burden the net sales of the second quarter by
approximately EUR 10 million and result by approximately EUR 8 million.

We reiterate our estimate that Vaisala's net sales in 2010 will grow slightly
compared to the preceding year. Uncertainty relating to the net sales and
profitability towards the rest of the year remains. The development programs
will continue to burden the result for the rest of the year. Hence contrary to
the earlier estimate, Vaisala estimates that the profitability in 2010 will be
slightly lower than in 2009.

Vaisala's second quarter results are published on August 11, 2010.

Further information:
Jouni Lintunen, CFO
Tel. +358 9 8949 2215, gsm +358 40 579 0181

Vaisala Oyj

Distribution:
NASDAQ OMX Helsinki

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
1400 professionals worldwide and is listed on the NASDAQ OMX Helsinki.
www.vaisala.com



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