The aerosol sampler collects particles in the air to the filter. This Lumikki sampler in the picture draws in 900 cubic metres of air per hour (m3/h) through the filter. The sampling time is typically one week. This sampler is situated in Kotka city.
The sampling filter in pretreatment. The dirt and dust from the air stains the filter gray or black. Also the radioactive particles in the air adhere to the filter from where they can be detected by making a gammaspectrometric measurement to the air filter.
