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Gases & Industries

Industry-wide Applications of Fixed Gas Systems

The type of gas being detected determines the most suitable method for detection. Hydrocarbons, for instance, are typically detected using infrared (IR) or catalytic technology, while toxic gases, often present in parts per million (ppm) or parts per billion (ppb) concentrations, are best detected using electrochemical sensors.

Here is a selection of gases, along with their common applications and the recommended detection methods:


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Methane Detection in Safety Applications


Methane holds significant importance due to its involvement in the production and combustion of natural gas, which are major sources of methane emissions. Methane production encompasses activities such as biomass burning, livestock farming, and waste management. Given the potential dangers associated with methane leaks, protecting individuals and equipment from potential explosions is crucial.

As a flammable gas, one of the primary risks associated with methane is the potential for fire or explosions if it reaches its lower explosive limit (LEL) in the air. Methane gas can ignite at concentrations between approximately 4.4% and 16.6% by volume.

Furthermore, methane is odorless and colorless, making it difficult to detect without proper gas monitoring equipment. This lack of detectability can increase the risks as leaks or accumulation of methane may go unnoticed until it reaches hazardous levels.


  • Refineries
  • Oil rigs
  • Wastewater plants

Methane Emission Rate Monitoring


CH4 is a potent greenhouse gas that contributes to climate change. One of the targets of the oil/gas industry is to reduce these emissions into the atmosphere.

In challenging applications, like complex piping infrastructure or remote areas, gas cloud imaging technology can increase safety. It provides 24/7 monitoring of gas concentration and emission rates in Ex zones in real-time. Operators can view multicolor images for different concentration levels with thermal imaging technology


  • LNG
  • Oil/Gas
  • Chemical industries

Hydrogen Peroxide


VHP (vapourized hydrogen peroxide) is generated by actively evaporating liquid hydrogen peroxide solution. The vapour is then released or injected into a confined space. A high concentration is needed to create a high decontamination rate of microorganisms. VHP is rated as a hazardous substance for humans with a defined workplace limit value. Safety targets are:

  • Workplace safety
  • Leak detection
  • Release for safe entry and access cycle parameter control
  • Emission monitoring after filter and scrubber

Regular checks of your H2O2 sensors are essential to ensure functionality and accuracy. Dräger offers you a fast and reliable target gas adjustment.


  • Pharma Industry
  • Laboratories
  • Chemical industry

Hydrogen Sulfide


The gas is found in the production of crude oil, LNG or wastewater plants. Primarily electrochemical sensors are used to detect H2S concentration in the ppm range. A reliable gas detection system is necessary to protect employees at site, often supported with sensor alive field tool, which assists the sensor by automatically starting the sensor test procedure to confirm the sensor’s functionality. The sensor tests are reported to the safety control unit so that the user is always informed about the status of the system.


  • Oil/Gas Industry
  • Waste Water
  • Chemical Industry



In environments where oxygen levels can fluctuate, there are two significant risks to consider: oxygen deficiency and oxygen enrichment. An oxygen detector continuously monitors oxygen levels and provides timely alerts to ensure the safety of individuals in oxygen-deficient environments. On the other hand, oxygen enrichment poses the risk of increased flammability and fire hazards. Organisations can also detect excessive oxygen levels and take immediate action to prevent fire incidents by employing the same oxygen detector. These detectors are critical in maintaining a safe and balanced oxygen environment, safeguarding personnel from oxygen deficiency and enrichment risks.


  • Chemical Industry
  • Pharma Industry



It is a strongly pungent smelling, colourless, water-soluble toxic gas that irritates tears and has a suffocating effect. Widely used as cooling medium, as a feedstock for fertilizer production or as hydrogen carrier. All industries are using it: Widely used in pharmceutical-, food & beverage-the chemical industry and in cleantech applications like on NH3 carrier ships. Normally the detection requirements are in range of 20- 300 ppm. At explosive concentrations around  15 Vol-% a catalytic detector is used to protect the environment against explosions.


  • Cooling
  • Fertilizer production
  • Hydrogen carrier

Carbon Dioxide


One of the most common toxic gases is carbon dioxide, seen in  food and beverage industries or CCUS processes. In case of leakages there is a high risk to be harmed significantly entering the CO2 gas cloud due to the lack of oxygen. The risk can be lowered, today modern gas detectors can detect in a highly specific manner CO2, with IR sensing technology.


  • Cooling (Pharma, Food & Beverage industries)
  • Fermentation (Food & Beverage)
  • Separation and storing of CO2 (CCUS Applications)

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