These pungent (and dangerous) gases are captured used appropriate scrubbers. For both social comfort and safety reasons, it is critical to monitor the yield efficiency of these scrubbers.

Today, these gases are detected using techniques ranging from "electronic noses" to chemoluminescence (for NH3) and UV fluorescence spectroscopy (for H2S).

The former have been questioned for the application as the results not only are more qualitative than quantitative and as false positive readings consequential to the natural chemical transformation of the compounds of interest I the atmosphere occurs.

The ProCeas Odeurs, based on the patented OFCEAS (Optical Feedback Cavity Enhanced Absorption Spectroscopy) technology coupled to the patented low pressure sampling technology enables such measurements.

Measurement of any or all of these pure compounds and/or mixtures under these conditions:

- is reliable;

- is very low maintenance;

- is insensitive to cross response phenomena;

- has very low levels of detection;

- has response times measured in seconds;

- has a wide dynamic concentration;

- does not experience instrumental response drift (self-standardization);

- does not require regularly schedule re-calibration (self-calibrating direct measurement);

- does not require sample conditioning; and

- is a laser spectrometer capable of multi-components analysis.

Three configurations are available:

Proceas Odeurs H2S; Proceas Odeurs NH3 and Proceas Odeurs H2S/NH3

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