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Vehicles Exhausts Monitoring Systems

Step #1: Please, choose the required system or fill in the questionnaire in the "Automatic Make Up of your Vehicles Exhausts Monitoring System" section to get recommendations
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


Automatic Make Up of your 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


What purposes the system will be used for?

to get emission rate levels for official use (to present it to state environmental control agency or to receive measured vehicles exhausts levels directly by state agency)
for use by/in automotive industry for its own needs
for scientific/educational purposes

Check up the components:

Sulphur dioxide SO2 Nitrous oxide NO Nitrogen dioxide NO2
Carbon monoxide CO Opacity
Mercury Hg
PM2.5 PM10 TSP
acid HNO2
Ammonia NH3 Hydrogen sulphide H2S
Sulphur trioxide SO3 Carbon dioxide CO2 Carbon disulphide CS2
Total hydro-
carbons THC
Methane CH4 Benzene C6H6
Toluene C7H8 Formal-
dehyde HCHO4
Naftalene C10H8
dehyde C2H4O
Propane C3H8 Ethyl-
benzene C6H5C2H5
Methanol CH4O Acethylene C2H2 Ethane C2H6
Ethene C2H4 Ethanol C2H6O Phenol C6H5OH

Do you prefer to measure by contact or by remote measuring system?

contact remote do not know

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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