Vaisala Signs a Significant Contract for Radiosondes

| Source: Vaisala
Vaisala Corporation
Stock Exchange Release
December 31, 2013 at 9:00 a.m.

Vaisala has signed a contract to deliver radiosondes to its long-term customer.
The deliveries start at the end of 2014 and will be completed during the summer
of 2018. The value of the deal is EUR 11.0 million.

Radiosondes are meteorological devices that are used to measure pressure,
temperature, humidity, wind speed and direction in the upper atmosphere. The
radiosonde reaches an altitude of up to 30 kilometers and transmits continuous
data to ground equipment during its ascent. The ground-based sounding system
processes the data and converts it into meteorological weather messages.

For Further Information Please Contact:
Kai Konola, Executive Vice President of Vaisala Weather Business
Tel. +358 40 5024 900, kai.konola[at]

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About Vaisala
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 1,400 professionals
worldwide and is listed on the NASDAQ OMX Helsinki stock exchange.