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smartGAS specializes in the development, production and calibration of NDIR gas sensors and are revolutionizing industrial applications worldwide.  smartGAS state-of-the-art sensors offer high accuracy and performance in any environment. But that is not all. As your trusted partner, they go beyond the NDIR range and offer a comprehensive range of gas analyzers that push the boundaries of technology and enable industry to achieve remarkable results.

Gas Detection

BasicEVO & TransmitterEVO

Gas Analyzers

Stationary Gas Analyzer Anarex & Portable Gas Analyzers

Gas Analysis

FLOWEVO, SILAREX, PAS & Paramagnetic O2

Gas Treatment and Accessories

Gas Sensor Calibration Tool Software, PREREX Gas Conditioning Systems

smartGAS gas sensors use infra-red absorption of gases (NDIR technology) and other technologies that are accurate, reliable and cost-efficient. They are suitable for an extremely wide variety of applications in process measuring technology and ambient air monitoring.

As a solutions provider for gas sensor technology, smartGAS can offer custom solutions.  Gases include:

CO & CO2
Acetone, n-butane, ethane, methane & propane
Refrigerant gases
NOX and other pollutant gases

These NDIR gas sensors work without moving parts or chemical reactants. This minimizes the maintenance work and thus the operating and servicing costs compared with other gas sensor technology. These gas sensors are environmentally friendly, long-lasting and reliable.  You too can benefit from smartGAS’ expertise!

New from smartGAS:

  • The SYMECO approach from smartGAS allows you to use different NDIR sensors from the FLOWEVO line. As an example, you can measure CO2 in % and CO in ppm with the same interface.
  • More ranges for CO measurement are available in their FLOWEVO series: 2000 ppm, 5000 ppm, 10 vol.-%, 50 vol.-% & 100 vol.-%
  • smartGAS’ new NDIR Broadband refrigerant sensors from smartGAS provide a flexible solution for measuring multiple gases in one set-up. The broadband refrigerant sensor is calibrated to 2000 ppm R134a, but is also great for measuring R125, R404a, R407a and R410a. You select the gas to be measured in your application and apply the appropriate conversion factor.
  • The  SILAREX sensor platform allows multiple gases to be measured in the same module. It also has pressure compensation.

The functional principle of smartGAS sensors & modules

The IR principle uses the individual absorption spectrum of the gas being measured. The exact gas concentration is determined through precise quantitative analysis of this spectrum. Because of this, their gas sensors function very selectively and are virtually unaffected by other environmental factors or gases.

The functional principle of our gas sensors: long-term stability and performance thanks to NDIR technology from smartGAS

As all measured gases absorb in varying spectral ranges, a kind of “fingerprint” arises that allows very selective characterization without cross-sensitivities. Gas sensors from smartGAS possess an integrated electronic evaluation system that displays a simple to use concentration signal to you as the user and reliably compensates for all drift and temperature influences.

Gas sensors for the process measuring technology

The precise and selective gas sensors from smartGAS are distinguished by simple handling and cost efficiency – even in demanding applications. Knowledge of the internal flows and current state of a process is essential for the control and cost-efficient operation of plants. If measurements are lost, or if they cannot be used, this can lead to high costs. We possess this knowledge and incorporate it in your application as a solution. Our optimized optical components, in combination with the adapted software, ensure high long-term stability and performance – for your application too. In contrast to chemically-based gas sensors, their products are not only lower-maintenance and longer lasting, but also detect even chemically inactive gases quickly and reliably.

» Analysis Sensors for Process Measuring Technology

Gas sensors for ambient air monitoring

The monitoring of gas concentrations in the ambient air requires especially long-term stable and reliable gas sensors. The measurements are usually carried out 24/7 – 365 days in the year. Reliability and insensitivity to external influences therefore make gas sensors from smartGAS the first choice for your measuring task.

Precalibrated, Compact NDIR Gas Sensor Modules

FLOWEVO Long Path Modules for Process Measurement

NDIR sensors from smartGAS offer many advantages for successful process measurement and are therefore ideal for use in process control. They have a large spectrum of measurable gases and are especially convincing where it is important to have the utmost precision and reliability. Different versions can be very easily combined, also facilitating complex measuring tasks. All smartGAS sensors are designated by low detection limits, very small drift, a large temperature range and a fast response time and markedly low operating and maintenance costs.

  • “Ready to use” NDIR sensors
  • Low maintenance
  • Low detection limits
  • Selectivity against influencing gases
  • Flexible interfaces
  • Temperature and drift compensated
  • Compact construction

Our NDIR sensors in the FLOWEVO series combine measuring precision with compact design and simple handling. We have minimized sizes considerably, without having to make compromises in terms of performance.

ProductGasesSensitivity - ppm Size
Long Path ModulesMany*High156 x 30 x 37 mm
F3-032205C2H4 Ethylene20ppm / 2000ppm
F3-042505CH4Methane50ppm / 5000ppm
F3-222108CO Carbon Monoxide0.2% / 100%
F3-222205CO Carbon Monoxide20ppm / 2000ppm
F3-212205-05000CO2 Carbon Dioxide8ppm / 2000ppm
F3-600503SF60.5ppm / 50ppm

* Gases include acetone, n-butane, CO, CO2, ethane, methane, propane, refrigerant gases & NOX and other pollutant gases.

FLOWEVO Short Path Modules for Process Measurement

ProductGasesSensitivity - ppm Size
Short Path ModulesMany*Medium76 x 30 x 37 mm
F3-222207CO Carbon Monoxide0.07% / 20%
F3-212506-05000CO2 Carbon Dioxide0.03% / 5%
F3-212207-05000CO2 Carbon Dioxide0.07% / 20%
F3-600105SF68ppm / 1000ppm
F3-600108SF60.3% / 100%

* Gases include acetone, n-butane, CO, CO2, ethane, methane, propane, refrigerant gases & NOX and other pollutant gases.

BASICEVO Sensors for Diffusion Applications

Diffusion sensors for ambient air monitoring are available from smartGAS as the BASICEVO series. Just like all smartGAS-sensors are distinguished by low detection limits, very slight drift, a large temperature range, a fast response time and low maintenance costs. The BASICevo series is therefore the optimal solution for all applications in which an ambient air sensor should be reliable and at the same time simple in its handling.

  • “Ready to use” NDIR sensor
  • Low maintenance
  • Low signal drift
  • Long lifetime
  • Selectivity against influencing gases
  • Compact construction
  • Gas inlet by diffusion

Simple, compact, everything on board – BASICEVO offers the perfect basis when it comes to cost-efficient ambient air monitoring – without compromises in the performance!

ProductGasesSensitivity - ppm Size
Diffusion ModulesMany*Low70 x 60 x 37 mm
B1-040446CH4Methane1% / 4.4%
B3-212207-03000CO2 Carbon Dioxide0.01% / 20%
F3-600108SF63% / 100%
If you need flexibility in choosing the refrigerant gas you want to measure, then the BASICevo Pro Broadband is the module for you.
  • Measure 20 different gases with the one sensor
  • Non Dispersive Infra-Red (NDIR) module, Dual beam / Reference channel
  • Has an Internal calibration curve for each Freon gas
  • Easy to set the Target Gas
  • You pick the Measurement Range – 2000 ppm or 1000 ppm

If you do not need this flexibility, use one of the fixed Freon BASICevo Sensor Modules listed below.

ProductGasesSensitivity - ppmSize
Refrigerant Gas
BASICevo Pro Broadband20 Refrigerant Gases1 ppm (1000 or 2000 range)
B3-702105-03000R22100070x60x37 mm

* Gases include acetone, n-butane, CO, CO2, ethane, methane, propane, refrigerant gases & NOX and other pollutant gases.

SILAREX Multiple Gas Solutions

Applications such as emission measurement require the simultaneous analysis of multiple gases like CO2, NO and SO2. SILAREX gas sensors have been developed for this application case and enable parallel concentration measurement of up to three measuring gases with one single NDIR gas sensor. The cross-sensitivities of the individual gases are compensated directly inside the SILAREX sensor, providing the user with fully prepared and corrected measuring values via Modbus ASCII / RTU for further processing. Compared to measuring with three individual sensors, the advantages are obvious: Only one sensor needs to be calibrated and maintained; varying sample preparation, different accuracies or life cycles of the sensors do not need to be considered.

  • Measure up to three gases (or 3 gas concentrations) simultaneously with one setup with one of the 4 channels still used as a reference.
  • Cross-sensitivity is calculated on-board.
  • Pressure and temperature are compensation on board.
  • Ready to use, calibrated shortening your development time.
  • NDIR technology for complex measurement tasks.

ProductGasesSensitivity - ppm Size
Silarex Module
Silarex Multi ChannelMulti GasHigh233 x 31 x 37mm
Standard Products

Silarex 3 Channel
CO2 20 Vol.-%, NO 2000 ppm, SO2 1000 ppm I SX-300003-00000
CO2 3-ch low range I SX-300011-00000

Silarex 2 Channel
CO2 20 Vol.-%, CO 1000 ppm I SX-200002-00000
CO2 20 Vol.-%, CO 10.000 ppm I SX-200004-00000
CO2 20 Vol.-%, CO 500 ppm I SX-200009-00000
CO2 20 Vol.-%, CO 2000 ppm I SX-200010-00000

SAE Module controls the sensor environment 

The SAE Module is the complete “Box” with:

  • Power Supply
  • Heater
  • Interface – RS485 digital output
smartGAS - SAE-Module-1812.png
ProductGasesSensitivity - ppm Size
SAE Module
SAE ModuleMulti Gas
Temp Controlled


PAS – Photoacoustic Sensors

The PAS sensor is based on the principle of photoacoustic spectroscopy (PAS), one of the most sensitive measuring methods for detecting gases. With even higher precision and reliability, the PAS detects gas volumes minimum measuring in ppm range. The sensor module can control all processes and components itself, an external control is not necessary. The PAS sensor is characterized by a very low zero point drift and automatically compensates the water vapor cross-sensitivity.

  • Low drift
  • Low maintenance
  • Low detection ranges
  • Designed for 24/7 operation

PAS – The sensor with a measuring method that detects even the smallest gas concentrations

PAS - Photoacoustic Sensors
1000 ppm | PA-032105-00000
200 ppm | PA-032204-00000
100 ppm | PA-2321104-00000
200 ppm | PA-242204-00000

Transmitter EVO

TRANSMITTEREVO – the OEM customer solution from smartGAS

The TRANSMITTEREVO is a device for the stationary, continuous monitoring of gas concentrations in the ambient air. The measuring of gases has long since become standard in many applications. In the past, customers and developers were previously often forced to adapt their applications and requirements to the gas measuring technology that was available at the time. smartGAS wants to change this.

This TRANSMITTEREVO was developed for customers where device development is not economical because the volumes are smaller. With the TRANSMITTEREVO, smartGAS offers the option of adapting the front display to suit the customer’s design and adapting the device to his application by combining it with gas sensors from the BASICEVO series diffusion sensors. This means that you receive “your custom device” calibrated and ready to go!

  • “Ready to use” gas transmitter
  • (0)4 – 20 mA
  • Modbus ASCII / RTU
  • 12 – 24 V DC input voltage
  • All sensors from the BASICEVO series diffusion sensors can be used
  • Front display can be customized to customer requirements

ANAREX Gas Analyzers

ANAREX Gas Analyzers for emission measurement and process control
(NDIR, PAS and many more sensors)

The smartGAS gas analyzers are high performance solutions for a variety of industrial gas measurements. Applications range from process measurement technology and emissions to fruit ripening. The ANAREX product family provides very accurate and stable measurement performance. Its customer-friendly interfacing with touchscreen and simple sensor calibration.  The ANAREX Gas Analyzer is designed as a multi-gas analyzer and bench unit 19″ rack mountable. The ANAREX mini portable units are self-contained analyzers. Some designs are  battery operated.

  • Multigas analyzer
  • Highly stable measurement performance
  • Easy operation via touch screen
  • Easy sensor calibration
  • The bench unit fits in a 19” rack.
  • The “ANAREX mini Gas Analyzer” portable units have may of the same capabilities as the bigger ANAREX Gas Analyzers.
  • Analogue or digital output
ANAREX Multigas Analyzers
ANAREX Gas Analyzer Capabilities
CO2_CO I AX-212200-00000 ANAREX Gas Analyzer
C2H4_CO2_O2 I AX-032150-00000 ANAREX Gas Analyzer
ANAREX mini Gas Analyzer Capabilities

PREREX Gas Conditioning Systems

Complete gas conditioning system for filtering and drying the sample gas.

Most gases in process measurement technology do not come from clean environments and do not have a clearly defined composition. Combustion exhaust gases, biogas or ambient gases are always contaminated with dust or moisture. The smartGAS PREREX is an ideal solution for application optimized sample gas conditioning.

The PREREX gas conditioning system is a powerful all-in-one solution that combines all the necessary components in one housing. The compact unit generates an extremely precise and long-term stable dew point, even with changing loads, and offers optimum operational reliability. This complete solution is designed for installation in a 19″ rack.

PREREX impresses with its maintenance-friendly design and safe operation. Thanks to selected components and little dead volume, PREREX ensures a fast response time.

Product features:

  • Complete solution for a large number of applications
  • Reliable and reproducible measurement results
  • Optimum operational safety due to self-monitoring
  • Extremely precise dew point with long-term stability
  • Fast response time due to low dead volume
  • Very low resolution rates
  • Continuous condensate removal
  • Low maintenance operation
  • Easy to maintain design

Datasheet for PREREX Gas Conditioning Systems

Pest Control Gas

ProductGasesSensitivity - ppm Size
Pest Control Gas
Gas ModuleSO2F2 Sulphuryl Fluoride4%

Gas Sensor Calibration Tool Software

smartGAS has updated the Gas Sensor Calibration Tool Software with the following new features.

  • More diagnostics
  • Export of data sets for remote diagnosis by smartGAS
  • Reset to factory settings
  • Graphic concentration displays
  • For all B3 and F3 sensors with / without Connect Interface
  • It is free. Download it, try it out and use it. The new tool no longer requires a license. Email us for more info and a download link.
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