Every day, unhealthy air quality affects lives of millions of people all over the world. Numerous studies have shown correlation between particle concentration and adverse health effects especially for sensitive groups of people. Whereas regulated fine particle concentration values in air often focus only on PM10 and PM2.5, a more detailed determination of particle characteristics if often needed to fully understand the link between PM and their effect on human health. To determine the source of the particles...
Different types of filters such as fiber filters, membrane filters and fabric filters can be used to remove particles from air flow. The removal of the particles by the filter happens via different mechanism including interception, impaction, diffusion and electrostatic attraction. Typically, the effectiveness of the filter is described with a filtration efficiency value, which is the efficiency of the filter to remove particles from the air flow in percentage (0–100 %). The amount of removed...
Dekati measurement solutions for occupational health and industrial hygiene include both portable and stationary PM measurement systems as well as solutions for overall industrial hygiene measurements according to ISO16000-34 and ISO16000-37. Our aerosol measurement solutions have been successfully used in various health and safety monitoring and research areas for over 25 years and today, our instruments are used globally by thousands of customers both in research and industry to measure...
Engine emission measurements are typically made in very different environments and conditions depending on the purpose of the measurement. Standardized and regulated particle emission measurements are made in test cell environments, PTI stations and on board a moving vehicles according the details described in the regulations and standards. For various research purposes, engine emissions can be measured in different conditions and even pre-DPF conditions. The requirements for the measurement instrument in...
Dekati measurement solutions for determination of particulate emissions from engines include both particle detection and sample conditioning solutions. For non-road and off-road emission measurements, we have complete measurement solutions both upstream and downstream exhaust after-treatment devices. The exhaust sample conditions in marine and aircraft engine emission measurements may vary a lot depending on the type of engine, type of fuel and also measurement location.
As exhaust emissions from engine tailpipe have been decreasing in recent years through development of engines and exhaust after-treatment systems, non-exhaust emissions have become a major contributor to total particle emissions from vehicles. Numerous studies have shown that non-exhaust emissions can equal or even exceed those from the exhaust, and we have a measurement system for both types of emissions. Also, the discussions around Euro 7 emission standards has increased the interest and need for non-exhaust...