Laoyinghaina LY-DOAS automobile exhaust NOx (portable version) flue gas analyzer/combustion analyzer

Introduction

Automotive exhaust UV differential NOx gas measurement optical module (portable version) in Based on the standard version,the size of the spectrometer is reduced and the optical fiber is eliminated. The module is more integrated and compact,making it more suitable for the development of portable instruments.

Principle and Features

When the UV-visible continuous spectrum emitted by the light source passes through the sample gas con the gas to be measured,the light energy of a specific wavelength is absorbed by the target gas in the sample gas. The absorption of light (absorbance) is proportional to the concentration of the target gas. Spectral analysis is used. The empirical curve between the laboratory-calibrated differential absorbance and the target gas concentration is established with the chemometric method,and the target gas concentration in the sample gas is calculated in real time based on the differential absorbance of the measured sample gas on site.

The product adopts an original designed new multi-reflection long optical path gas chamber. The incident light passes through the gas chamber. The indoor concave reflector returns several times and finally converges to the light outlet. Since the light beam in the air chamber is reflected by the reflectors fixed at both ends,the air chamber wall does not participate in the reflection of the measurement beam,which can avoid the aging of the traditional inner wall reflective air chamber. This will lead to signal drift,sensitivity loss and other phenomena,ensuring the stability of the optical path in the long-term use of the air chamber. Using multiple reflection technology,small size and long optical path can be achieved at the same time,and the optical path can be customized according to application requirements.

Application

Ambient air analysis,stationary pollution source exhaust gas analysis,mobile pollution source exhaust analysis,industrial process gas analysis,laboratory gas analysis.

Features

Directly detects NO2 without the need for a reformer. The original design of a new multi-reflection air chamber takes into account both Long optical path and fast response,using UV differential absorption spectroscopy technology,not affected by water vapor and pollution,using pulse xenon light source,shorter preheating time and life,the mechanical structure can be customized according to needs.