Overview of VGT Series I Station Vehicle Emission Tester
VGT Series I Station emission tester is a series of products developed for vehicle exhaust detection. It adopts Ultraviolet Differential Optical Absorption(UV-DOAS) to measure concentration of NO and NO2; Non-dispersive Infrared Absorption Technology todetect concentration of HC, CO and CO2; Electrochemical Cell Technology for O2 concentration measurement. It can be divided into the following models according to different working field conditions.
VGT-100V: VMAS, detectable componments: NO,NO2,HC,CO,CO2,O2
VGT-100A: ASM, detectable componments: NO,HC,CO,CO2,O2
VGT-100:gasline-diesel AIO, detectable componments: NO, NO2, CO2
Features of VGT Series I Station Vehicle Emission Tester
Employ UV optical platform to monitor NO without interfering by water vapour
Adopt spectroscopy to measure NO2 directly, solving the problem that conversion efficiency of traditional converter will reduce over time
Use imported NDIR platform to detect HC/CO/CO2 with stable performance,fast response and high accuracy
With long service life, less maintenance workload and low maintenance cost
Touch screen, better human-computer interaction experience, simple operation; the screen supports 4G network and print function
Principle of VGT Series I Station Vehicle Emission Tester
Adopting UV-DOAS technology, the optical platform is composed by light source, gas chamber, optical fiber and spectrograph (including diaphragm, holographic grating and linear array detector) and etc.
The UV light emitted by light source enters gas chamber via optical window and will be absorbed by measured gas; it gathers by lens and couples into optical fiber; enters spectrograph for light splitting and photovoltaic conversion to obtain gas absorption spectrum. The related gas component concentration can be calculated by analyzing the spectrum.
Specification of VGT Series I Station Vehicle Emission Tester