CEMS-2000B

The light source emits ultraviolet beam which transfers to gas cell through optical fiber
After absorption by measuring gas, the light beam transfers through optical fiber to spectrometer.
Being dispersed through the grating, and converted into electric signal by the array sensor, a continuous absorption spectrum of measuring gas is thereafter obtained.

Item	UV Hot-Wet Method	NDIR
Spectral Range	Complete and continuous absorption spectra obtained through holographic grating and diode array detection	Non Dispersive, characteristic absorption spectra obtained through band-pass filter
Linear Response	High wavelength resolution secures linear response	band-pass filtration compromises linear response
SO₂ Loss	Hot-wet prohibits SO₂ dissolution	Condensation inevitably causes SO₂ loss
Sampling System	Heat tracing. Requests only dust filtration, simple and no corrosive	Cold-dry. Requests dust filtration, condensation, water removal and corrosion proof
Zero Calibration Period	Long (DOAS algorithm)	Short
Anti-Interference	The combination of complete & continuous absorption spectra, high wavelength resolution, DAOS algorithm erases interference from dust, moisture and background gases	Vulnerable to moisture interference
Gas Cell	Connected by optical fiber, easy to replace and low maintenance cost	Complex to replace and maintenance
Maintenance
Reliability	No moving parts	Moving parts existed

All-in-one Architecture

Full spectrum measurement and DOAS (Differential Optical Absorption Spectroscopy) algorithm, excelling in accuracy, repeatability and anti-interference with moisture, dust.
Modular design and no moving parts, higher reliability and easier maintenance.
Pulse Xenon Lamp used as light source with over 10-year lifetime.
The adoption of diode array sensor enables instant spectrum acquisition and rapid response.