Industrial gas emissions have contributed enormously to the air pollution and must be monitored continuously. In China, there are several companies that develop and manufacture CEMS, or continuous emission monitoring systems. These systems are often used to perform air pollution measurements.

Environmental preservation in China has been closely examined in recent times, and there is increasing concern about reducing environmental pollution. This is why the popularity of environmental monitoring systems has increased over the past couple of years.

Configuring a CEMS Setup

These systems monitor the concentration of industrial gases and suspended particles emitted from air pollution sources. UV spectrometers are integrated to the CEMS used for calculating the absorption of SOx/NOx.

Avantes’ spectrometers have high demands regarding stray light levels, optical resolution, stability and sensitivity, which makes them perfect for integration into CEMS.

Differential optical absorption spectroscopy or DOAS is often used in these monitoring systems. Because of their high stability requirements, cooled spectrometers like the AvaSpec-ULS2048x64TEC-EVO are an ideal choice for DOAS applications. For less demanding applications, our AvaSpec-ULS2048x64-EVO and AvaSpec-ULS2048XL-EVO are great lower-cost candidates.

The diagram below shows an emission-monitoring system using DOAS to measure pollution.

Figure 1: Diagram of a CEMS using DOAS

Contact one of our sales engineers for advice on the perfect setup for your CEMS!