UVDOAS Analysis Cell

> Application

Apply to exhaust emission monitoring and process control such as coal-fired power plants, garbage power plant, cement, glass, lime factory, ceramics factory, sinter, coke oven, deSOx, deNOx technology and etc.

> Technical principle

Ultraviolet differential optical absorption spectroscopy (DOAS)

The optical technology platform consists of light sources, gas chamber, optical and spectroscopic (including diaphragm, holographic grating, linear array detector) and other optical components.

Ultraviolet light is sent by the light source through the optical window into gas chamber; absorbed by the sample gas through the gas chamber. The light carrying sample absorption information gathers through lens coupled into fiber and then transmits through the optical fiber into spectrometer. After light splitting and photo-voltaic, conversion, absorption spectrum is obtained and analyzed to calculate the concentration of the related components in gas.

> Specification

> Feature

1. Low detection limit and temperature-drift

2. Getting NOx by directly measuring NO and NO2 without NO2→NO converter

3. No interference of particulate matter, moisture and other factors

4. No optical moving parts, high reliability, no interference to the measurement by field