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Vehicles Exhausts Monitoring Systems

Please, choose the required Vehicles Exhausts Monitoring System
Schematic of Extractive Vehicles Exhausts Monitoring System
Schematic of In-Situ Vehicles Exhausts Monitoring System
If your need is periodic control by cheap portable instrumentation please choose the Portable Monitoring System here: Schematic of Portable Monitoring of Vehicles Exhausts
If your primary need is control of dust (pm2.5, pm10, tsp or opacity of dust flow) please choose Monitoring System here: Schematic of Monitoring System of Particles in Vehicles Exhausts


Extractive or Portable (Extractive) Vehicles Exhausts
Monitoring System


In-Situ Vehicles Exhausts
Monitoring System


Primary Benefits of Extractive Systems:

  • Conducts measurements in a point
  • Extractive stationary vehicles exhausts monitoring system is used for official vehicles exhausts control and for regulation of vehicle engines
  • Calibration is conducted in a conventional way with the help of gases in cylinders (approved worldwide for the most gases)
  • The system is more safe

Primary Benefits of In-Situ Systems:

  • Collects direct real-time data [less than 10 msec for the UV and less than 80 msec for the IR] on a set of 25 or more species (such as NO, NO2, NH3, BTX, SO2, CO, CO2, HCs, etc ) as the vehicles intercept the light beam projected across the driving lane
  • Only one multi-components optical gas analyzer is used in a system as a rule, which is more convenient and less expensive in a maintenance
  • Calibration is conducted in a special way with the help of special standards. It is adopted that the concentration of a pollutant over the monitoring path would be equivalent to a much higher concentration of the pollutant contained in a short calibration cell inserted into the optical beam of an open path analyzer during a precision test or accuracy audit. So running-gas or sealed short gas cells or compliant internal calibration standarts can be used
  • The data can be applied for investigation of the chemical composition of the plume and fast reactions occurring in the plume

Primary Limitations of Extractive Systems:

  • Requires sampling with a sample contact. Change of concentration of studied species in a sample is possible because of cross-reaction of components and/or adsorption
  • Requires calibration by gases in cylinders as well as requires manifolds, pumps, control and test equipment for conducting frequent periodic system calibration
  • Slower response due to sample transit time

Primary Limitations of In-Situ Systems:

  • Not so many components are approved to be controlled for an official presentation
  • Hard weather conditions can influence on result and/or duration of measurements
  • Influence of interfering components on result of measurement is generally stronger for multi-components gas analyzers - In-Situ analyzers in our case

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