ATEX sensor probe for monitoring combustible and toxic gases (e. g. Propane)

The small and innovative SSAX1 sensor from MSR-Electronic


Whether in petrochemical industries, vending machines, biogas plants or even beverage bottling plants with propane: The innovative SSAX1 sensor probe from MSR-Electronic effectively protects people and equipment in dangerous situations when combustible and toxic gases escape.


The SSAX1 sensor head with infrared measuring method


In addition to the high-quality infrared sensor element and the measuring amplifier, the sensor probe SSAX1 contains a µController for processing the measured values. The IR measuring principle with integrated temperature compensation ensures highest accuracy, selectivity and reliability. All relevant data and measured values of the sensor element are stored fail-safe in the µController and are transmitted digitally via the local bus to the controller or the board (e. g. WSB2).

A signal output via PWM is also possible as an option. The remote sensor probe with local bus interface can be connected to the board with an standard ATEX cable of 5 m length for evaluation of the measured values. The board is mounted outside the hazardous areas and due to the small design of the sensor probe, the device can be installed almost anywhere.


Time-saving recalibration


The calibration management is also integrated in the µController of the sensor head. Calibration can be performed by simply changing the sensor head or by using the integrated, convenient calibration routine directly at the system. This saves time and costs and additionally increases the safety of the system.


Features and benefits of the ATEX sensor probe


SSAX gas sensors from MSR-Electronic

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  • ATEX and IEC Ex certificates for electrical explosion protection
  • SSAX1-1 for Zone 1 (can also be used in Zone 2):
    • “Ex d” version with flameproof enclosure
  • Continuous monitoring
  • Low zero-point drift
  • Sensor with long service life (infrared_ > 5 years)
  • High accuracy, selectivity and reliability
  • Easy calibration by simply replacing the sensor head on site
  • Smallest housing dimensions
  • Reverse polarity protected
  • Overload protection
  • Protection class IP65 with SplashGuard



In addition to the ATEX sensor probe SSAX1 with infrared sensor, MSR-Electronic also offers solutions with electrochemical sensors and pellistor sensors for many combustible and toxic gases.

Further information on MSR products can be found in the current online catalog or in the webshop

MSR-Electronic is a manufacturer of fixed gas warning systems with decades of experience in the field of gas measurement technology.  The international company with headquarters in Germany has a wide range of methods for the detection of toxic, combustible gases and oxygen. On this basis MSR-Electronic develops individual gas sensors, controllers and warning devices for many applications, such as  parking garages, tunnelspetrochemical industry  or  shipping. The products meet more than the  general standards and regulations  and can therefore guarantee the safety of the plantIf you have any questions please send us an email or give us a call.