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Altech Environmental

Dioxins/Furans Pollutants Measured with CEMS Systems

Altech Environment is one of the only companies in the U.S. with both the experience and technology to sample dioxins/furans. We have numerous installations of our samplers in Europe and recently installed 2 AMESA systems in Canada. The AMESA system, approved in 1997 by TÜV Rheinland (Germany) is designed for the long-term sampling of Dioxins (PCDD), Furans (PCDF) and other Persistent Organic Pollutants (POPs). Traditionally, the monitoring of PCDD/Fs is performed by taking 1 – 3 short-term samples per year (each of 6 hours). By sampling over a period of up to 4 weeks, AMESA ensures continuous monitoring of dioxins/furans emissions for each single sample, ensuring that fluctuations in plant operation and in the composition of the fuel are accurately recorded.

A cooled probe (Less Than 50°C) is used to extract a portion of the flue gas isokinetically from the stack. Dioxins and Furans, dust and condensate of the flue gas are adsorbed in a specialized cartridge filled with XAD-2 and quartz-wool. An automatic leak test is performed before and after the sampling cycle to validate the non-contamination of the adsorbing cartridge. After adsorption, the measured gas is pumped through a flexible tube to the control cabinet, where the gas is cooled down (Less Than 5°C) to completely remove condensate. The isokinetic extraction is controlled as a function of the flue gas velocity, temperature and pressure, by use of a thermal mass flowmeter and a frequency controlled pump. The dry gas flow is determined by means of a calibrated gas meter and a thermal mass flowmeter. AMESA is fully automatic and all necessary data is stored internally and on a removable SRAM card. Both the XAD-2 cartridge and the SRAM card are sent to a laboratory for further analysis of PCDD/PCDF. The AMESA can be equipped with 4 sampling units, thus allowing successive automatic sampling of different pollutants (dioxins, heavy metals...) on the same stack, or multiplexing on different stacks (max. 4).

Contact Altech Environment for any questions you may have related to our AMESA dioxin/furan sampler @ 630.262.4400 or

Altech's instruments that measure Dioxins/Furans are as follows:

Complete Systems: