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AVL M.O.V.E. GAS PEMS Portable Exhaust Gas Analyzer

Compact Portable Emission Measurement System (PEMS) for measuring the THC, NO/NO2, CO/CO2 and O2 concentrations within the exhaust gas of Diesel- and Gasoline vehicles.

AVL Solution

The AVL GAS PEMS features a robust design, high accuracy and wide operating temperature range. The device is controlled via the AVL M.O.V.E System Control which is the central data logger, calculates the online mass emissions and provides interfaces to access e. g. ECU/ CAN data and additional sensors. The AVL M.O.V.E. GAS PEMS is especially designed and optimized in weight and dimension for mounting in cars and trucks and even on off road vehicles.

Your Benefits

  • Internal temperature conditioning ensures high measurement accuracy and a low drift even at changing and extreme ambient conditions between -30°C and +45°C
  • High measurement accuracy due to the usage of approved test cell analyzer which are optimized for the mobile application
  • A dedicated heating circuit protects the device during start-up at low temperatures
  • Effective internal damping measures and external damping options allow the usage in harsh testing environments
  • Low maintenance effort and easy access to all consumables

Wide operating temperature range and robust design

An especially for the mobile operation developed internal temperature conditioning system ensures reliable operation over a wide operating temperature range of -30 °C to + 45 °C without any additional external heating or cooling device. For higher temperatures it is possible to connect an external cooling device or a hose to e. g. the temperature conditioned passenger compartment. Additionally all analyzers are mounted inside temperature controlled enclosures for ensuring a high measurement accuracy even at changing ambient conditions.

The robust design of the instrument supports these attributes additionally. All analyzers are mounted on vibration dampers. External damping options like a mounting frame with vibration dampers and a rugged case (mandatory for testing non road machinery) provide additional protection and ensure a safe mounting.

A dedicated heating circuit protects critical electronic parts and the analyzers when the AVL GAS PEMS is powered on at low temperatures by switching on the heaters/ fans at first. As soon as a certain temperature is reached the other parts are supplied with power.

A special “Hibernate – Mode” with reduced power demand allows to keep the internal temperature e. g. overnight at a certain value for minimizing the warm-up time in the morning. By switching the AVL GAS PEMS to hibernate mode an automated start-up at free definable times via a timer is also possible.

The device is operated with 24V DC either by using a battery pack or a voltage converter.

A service door makes the access to consumables (e. g. filters) very easy. Optimized components extend the service intervals and reduce the maintenance effort.

Control of the GAS PEMS is done with the AVL M.O.V.E System Control device which calculates the online mass emissions and which provides interfaces to e. g. ECU/ CAN data and additional sensors like a GPS receiver or an exhaust flow meter. The System Control device is the central data logger for storing the different test data within one datafile. For the direct exhaust flow measurement differential pressure based Exhaust Flow Meter are available as an option. For data post processing and reporting according e. g. U.S. EPA HDIUT regulations AVL offers a powerful PEMS Post processing Software based on AVL Concerto.

Operating temperature (ambient)

 -30 to 45°C
 (higher temperatures can be achieved by
 connecting external cooling air e. g. from the
 temperature conditioned passenger
Storage temperature -40 to +70°C
 (Oxygen sensor needs to be removed)
Dimensions appr. 19“(482.6mm) x 8HU (356mm) x
 540mm (w*h*d)
Weight appr. 50kg
Warm-up time at 20°C ambient temp. < 1hr
Power demand 24V DC, appr. 450W @ 20°C ambient
 temperature (with 2m Sample Line) after
 warm up
Sample flow rate < 3.5l/min
Inputs/Outputs electrical Heated line connectors (3 heating
 with 2x PT100);
 1x Ethernet (TCP/IP )
 1x CAN (CAN bus monitoring)
 8x Analog out, 4x Analog in
 4x Digital out (DC-isolated), 5x Digital
 in (DC-isolated)
Measurement Range THC: 
 0-30,000 ppmC1
 NO/ NO2
 0-5,000 ppm (NO)
 0-2,500 ppm (NO2)
 CO/ CO2:
 0-5 vol% (CO), 0-20 vol% (CO2)
Zero Drift THC: 
 <1,5 ppmC1
 NO/ NO2:
 0,1 vol%/8h
Pneumatics Inputs/ Outputs ZERO gas, SPAN gas,
 Burner gas for HFID, sample gas IN,
 exhaust and drainage OUT


The AVL Gas PEMS uses a heated FID Analyzer for measuring the THC concentrations which does not require any additional external air supply. Instead cleaned ambient air is used as burner air. Except the burner gas (He/H2 mixture) there are no other operating gases which need to be carried along.

The NO / NO2 Measurement is carried out with an UV Analyzer, which can measure NO and NO2 simultaneously and directly without the need of a converter.

The UV analyzer can be calibrated with built-in calibration cuvettes which avoids carrying along an additional NO2 calibration gas bottles on board the vehicle. It is of course also possible to connect gas bottles for span calibration.

For the CO / CO2 measurement a NDIR analyzer is used which was especially optimized for a high accuracy and resolution of the CO channel at a measurement range below 0.1vol%.

All analyzers are mounted inside temperature controlled enclosures to ensure stable conditions and a high accuracy even at changing ambient conditions.

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General | Februar 2014