Vaisala Oyj

Regulatory Filings • Oct 27, 2011

Disclosure 294793

Vaisala - Company Announcement

Vaisala Oyj : Vaisala Signs 6.7 Million Euro Contract

Vaisala Corporation Stock Exchange Release October 27, 2011 at 2:15 p.m. Vaisala has signed a contract with a long standing customer for upper air observation products. The value of the contract is 6.7 million euros. The deliveries start in November 2011 and end in 2013. 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. Further information: Kai Konola, Executive Vice President, Weather Tel. +358 40 502 4900, kai.konola@vaisala.com -------------------------------------- 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. www.vaisala.com [HUG#1558692]