NOx Optical Bench for Vehicle Emission Appication

Introduction

The bench adopts multi-component photodetector, anti-interference algorithm to measure concentratio of SO2, NO and NOx. It is in high accuracy and realiability, with fast response time and wide range of applications. Both USB interface and RS232 are available for data output. 

UV-DOAS technology

Compared with other detection methods (electrochemistry and NDIR), the adopted technology can realize simultaneous and direct measurement of NO and NO2 with advantages of fast response time, high accuracy, small volume, simple structure and no interference of  background gas  (like moisture). It supports MODBUS protocol and customization.

Feature

Based on UV gas analysis technology with years of research experience; self-developed core technology and algorithm; strong market competitiveness

Fast response speed, solve NO2 absorption problem, T90≤ 3.5s (NO2 index),T95≤ 4.5s

Without interference of substances like H2O, dust, HC and CO2

Specification

Range： NO 0-4000ppm， NO2 0-1000 ppm

Relative linearity error:≤ ±4%/≤±25ppm

Repeatability: ≤2%

Stability:≤2%

Zero drift:≤ ±2%F.S/24h

Span drift:≤ ±2%F.S/24h

Response time:T90≤3.5s, T10≤3.5s

Anti-interference requirement:NO NO2≤±1%

Gas flow:2±0.1L/min

Supply voltage:220VAC,55W

Interface:RS232, adopt Modbus protocol

Measure NO and NO2 simultaneously and directly, solve the problem that conversion efficiency of conventional converter will gradually decrease over time