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Second assembly by clamp The use of clamp enables a second assembly/disassembly of the emitter and receiver for checking or recalibration procedures. The emitter and receiver can be easily transferred on a special calibration tube for zero checking or a specific gas calibration.

10-years lamp lifetime The UV xenon lamp is specified for 1,000,000,000 flashes that give more than 10 years of lifetime with continuous measurements. This reduces significantly the maintenance and the risk of wrong measurement due to age lamps or due to the replacement itself.

2-wires RS485 link over long distance A 2-wires inexpensive RS485 link is used to connect the receiver on the stack to the analyser located in the control room. Distance over hundreds of meters can be achieved in an electrically noisy environment.

No risk of interference with CO, CO2, H2O The major emission gases like CO, CO2 and H2O do not have UV absorption, and so will never interfere with the measured gases at the opposite of FT-IR based systems.


Advantages:

Cost-effective FT-UV DOAS Technology

In-situ cross stack measurement for low maintenance

No risk of interference with H2O, CO, CO2 at the opposite of FT-IR

10-years lamp lifetime

Applications: Power Plants, Waste Incinerators, Chemical Industry, Cement Industry, Mineral wool Industry, Fertilizer Industry

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Introduction

The reduction of gas emission on industrial plants is now a global concern for the environment as climate change, forest devastation and respiratory diseases are endangering present and future generations.

The aim of Awa Instruments is to provide worldwide reliable and cost effective environmental monitoring solutions to control emission gases.

With a 10-years experience on ammonia gas detection by UV spectroscopy and hundreds of on-line analyzers installed, we now extend our technology to a wide range of UV absorbing gases.

Key factors for successful on-line analysis as stability, low maintenance and low operating cost have oriented our design to the DOAS method (Differential Optical Absorbance Spectroscopy) based on the Beer Lambert law. No sampling system is needed reducing the maintenance and installation costs. An air purge circuit maintains clean the optics.

Typical applications are SCR and SNCR processes where simultaneous measurement of NO, NO2 and NH3 is necessary to control the DENOx process, as well as other chemical processes.

Multi-gas system based on proprietary
FFT-UV algorithms


Based on the recognition of the specific UV spectrum of gases by proprietary algorithms using Fast Fourier Transform, the system can detect with a high selectivity and simultaneously up to 8 gases on a complex gas matrix.

High flux direct light coupling

Using a direct light coupling without optical fiber, the high flux of light enable the measurements with a high level of dust inside the stack. The distance between the stack and the controller is not limited as with optical fiber systems.

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