OPSIS Blog

Multiplexed Monitoring – To be Doubt or Not?

Bengt Löfstedt
CEM
2019-02-28
View Count 269

So called multiplexing allows design of cost-effective monitoring systems. But there’s multiplexing, and there’s multiplexing. Let’s have a look at the principles and explain why optical multiplexing is straight-forward while gas multiplexing has its issues.

Fence-line Monitoring: Benzene and Beyond

Bengt Löfstedt
AQM
2019-01-17
View Count 464

Fence-line monitoring of the ambient air around industrial facilities can protect health and environment, but it can also help track leaks and improve production quality. How does it work, and what should be monitored? Here’s an introduction to the subject.

Gas Concentration Monitoring in Sulfuric Acid Production

Bengt Löfstedt
CEM
2019-01-02
View Count 582

It is important to monitor concentrations of sulfur dioxide and other gaseous substances in the production of sulfuric acid. What monitoring needs can there be, and how can these needs be met in a convenient way?

Pollutant Reduction Control and Continuous Emissions Monitoring at Waste-to-Energy Plants

Bengt Löfstedt
CEM
2018-12-04
View Count 503

Waste incineration might sound negative, but properly managed, it can be an efficient and environmentally sound way to make the best out of waste that cannot easily be recycled. But how can the emissions of air pollutants best be reduced and monitored?

Continuous Emissions Monitoring of Total Mercury

Bengt Löfstedt
CEM
2018-11-15
View Count 852

Mercury emissions from waste incinerators and other industrial facilities are often strictly regulated. This calls for monitoring of mercury concentrations. That is not always an easy task, but there is a method available giving the true total mercury content in the flue gas. Let us take a closer look at the topic.

Monitoring of Hydrogen Sulfide in Industrial Processes

Bengt Löfstedt
CEM
2018-10-15
View Count 1049

What is hydrogen sulfide? And why is it important to monitor in industrial processes?

What is the Difference between a gas analyser and a gas monitor?

Bengt Löfstedt
AQM, CEM
2018-03-15
View Count 1832

Can there really be a difference between what a gas analyser is and what a gas monitor is? Or maybe it's the same? Let us sort it out for you.

Operating Principle of an Oxygen Monitor

Bengt Löfstedt
Marine, CEM
2018-02-22
View Count 1435

Why measure the oxygen concentration in the flue gas in a combustion process? And what is the difference between measuring the oxygen concentration with a zirconia cell vs. a DOAS system?

Planning for a Gas Monitoring System

Bengt Löfstedt
AQM, CEM
2018-01-09
View Count 1957

Do you need a gas monitoring system? Then you know which gases you want to monitor, and you probably have an idea of measurement ranges and accuracy requirements. But which other aspects have to be considered?