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Methane – CH4

This page presents information about methane (CH4) – also known as natural gas – appropriate detection means – methane CH4 gas detector – and respiratory protective equipment (self-contained breathing apparatus and supplied air respirator).

Methane CH4 gas detector and CH4 respiratory protection

Methane properties

Natural gas – or methane – (CH4) is naturally produced from decomposition of organic matter in poorly oxygenated areas. Its anthropogenic version is massively produced through the exploitation and combustion of fossil matter and in any other field of activity with organic matter decomposition: waste landfill sites, biogas production.

CASLELLSEIPDensity / AirFilter / SCBA
1333-74-04 %75 %15.43 eV0.07SCBA

Dangers of methane gas

Methane (CH4) is colorless, odorless and heavier than air. Because of these properties, this gas cannot be detected without proper equipment and can accumulate in suspended ceilings and other high-up areas. This gas is above all extremely flammable (R12) and explosive, with explosive limits between 5 and 15% volume.

Methane – CH4 gas – is not a toxic gas but it might replace oxygen when reaching high concentration levels in poorly ventilated areas. It is also responsible of the greenhouse effect as it absorbs earth infrared rays that enhance climate warming. Methane is one of the six major gases covered by the Kyoto protocol.

Methane CH4 gas detector

As methane is not detectable through smell, only a CH4 gas detector can accurately measure the presence of this combustible gas. It is recommended to use a methane detection system that will be monitoring concentrations in percentage of the LEL (explosimeter or combustible gas monitor).

The Radius BZ1 is a high performance area gas monitor. As it is made with rough materials, it suits in the most demanding ATEX standards and the harshest environments.

  • Industrial scientific area gas monitor Radius BZ1 for workers safety
  • Detection of combustible gases, Cl2, CO, H2, H2S, HCN, NH3, NO2, O2, SO2 and VOC.
  • Duplicate 108 dB audible alarm and red & blue LED visual alarm
  • Runtime: 168 hours without pump (7 days) and 84 hours with pump
  • Dimensions: 29 x 29 x 55 cm – weight 7.5 kg – 11.2 cm LCD display
  • Available with optional LENS wireless technology

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Area gas monitor – RADIUS BZ1

The Radius BZ1 is a high performance area gas monitor. As it is made with rough materials, it suits in the most demanding ATEX standards and the harshest environments.

Industrial scientific area gas monitor Radius BZ1 for workers safety
  • Detection of combustible gases, Cl2, CO, H2, H2S, HCN, NH3, NO2, O2, SO2 and VOC.
  • Duplicate 108 dB audible alarm and red & blue LED visual alarm
  • Runtime: 168 hours without pump (7 days) and 84 hours with pump
  • Dimensions: 29 x 29 x 55 cm – weight 7.5 kg – 11.2 cm LCD display
  • Available with optional LENS wireless technology

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VENTIS-MX4 portable gas detector that complies with ATEX standards. This detector can detect from 1 to 4 gases with a large range of sensor combinations (Explo 0-100% LEL, O2, CO, H2S, NO2, SO2).

  • Detection of Explo (0-100% LEL), O2, CO, H2S, NO2, SO2
  • Robust, shock-resistant and waterproof device (IP66 and IP67)
  • Enhanced visibility with safety orange overmold
  • Compact and lightweight: first multigas detector with a single-gas detector size
  • Optional slide-on sampling pump (up to 30 meters)
  • Additional information
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Portable 4 gas detector – VENTIS-MX4 – EXLO, O2, CO, H2S

VENTIS-MX4 portable gas detector that complies with ATEX standards. This detector can detect from 1 to 4 gases with a large range of sensor combinations (Explo 0-100% LEL, O2, CO, H2S, NO2, SO2).

Portable gas detector MX4-Ventis
  • Detection of Explo (0-100% LEL), O2, CO, H2S, NO2, SO2
  • Robust, shock-resistant and waterproof device (IP66 and IP67)
  • Enhanced visibility with safety orange overmold
  • Compact and lightweight: first multigas detector with a single-gas detector size
  • Optional slide-on sampling pump (up to 30 meters)
Additional information

The Ventis-MX4 is a portable multigas detector. Contrary to single-gas detectors, it can detect up to 4 gases. Thanks to its rechargeable Li-ion battery, it can continuously operate during around 12 hours at 20°C ambient temperature. This battery can be replaced by an optional extended battery for up to 20 hours of autonomy without pump.

The Ventis-MX4 portable gas detector can detect up to 4 gases amongst explosive gases, oxygen (O2), carbon monoxide (CO), hydrogen sulfide (H2S), sulfur dioxide (SO2) and nitrogen dioxide (NO2). A specific location is dedicated to the explo sensor (catalytic sensor) and the oxygen sensor (electrochemical sensor). A 4 gas unit will basically include oxygen and explo sensors.

The Ventis-MX4 features 3 different alarms. The first one is a powerful 95 dB at 30 cm audible alarm to alert in noisy environmets. A high visibility red LED visual alarm and an ultra- vibrating alarm are added to improve safety. Two alarm levels are configures: low and high alarms – which are basically calibrated under occupational safety at work data.

The Ventis-MX4 portable gas detector also features the same physical properties – dimension and weight – than a single-gas detector. It can be wore close to the breathing tracts thanks to its crocodile clip without disturbing the user. This multigas detector shock-resistant and waterproof thanks to its high visibility polycarbonate-made overmold.

As this device can detect explosive gases, it meets current EU ATEX standards (explosive atmosphere). A sampling pump – VSP for Ventis-MX4 – is available to draw remote samples (up to 30 meters) before interventions – e.g. in confined space.

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The Ventis Pro5 detector is equipped with new features such as a panic button to improve safety of workers evolving in hazardous areas.

Detection of the combustible gases, NH3, CO, CO/H2S, H2S, HCN, NO2, O2, SO2, CO2, HC.

  • Dimensions: 104 x 58 x 36 mm – weight: 200 grams without pump
  • Audible (95 dB), LED visual (2 red and 2 blue) and vibrating alarms
  • Rechargeable lithium-ion battery with optional extended battery
  • Polycarbonate housing with waterproof rubber overmold (IP68)
  • Datalogging over 3 months with 10 seconds interval
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Portable multigas detector – VENTIS PRO5 – up to 5 gases

The Ventis Pro5 detector is equipped with new features such as a panic button to improve safety of workers evolving in hazardous areas.

Detection of the combustible gases, NH3, CO, CO/H2S, H2S, HCN, NO2, O2, SO2, CO2, HC.

  • Dimensions: 104 x 58 x 36 mm – weight: 200 grams without pump
  • Audible (95 dB), LED visual (2 red and 2 blue) and vibrating alarms
  • Rechargeable lithium-ion battery with optional extended battery
  • Polycarbonate housing with waterproof rubber overmold (IP68)
  • Datalogging over 3 months with 10 seconds interval
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SIL 2 approved ATEX gas detector to detect the combustible gases (IR or catalytic), CO2 (IR), toxic gases (electrochemical), solvents or freons (semiconductor) and asphyxiating gases (oxygen deficiency).

  • Fixed gas detector OLCT100
  • Detection of hydrocarbons, solvents, toxic gases, freons, VOC, CO2
  • Housing made of aluminium with epoxy paint (optional 316L Stainless Steel version)
  • Outputs: OLC100: Wheatstone bridge – OLCT100: 4-20 mA linear
  • Power supply: 15.5 to 32 VDC
  • ATEX & SIL 2 approved for catalytic and infrared versions
  • Additional information
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Fixed gas detector – OLCT100

SIL 2 approved ATEX gas detector to detect the combustible gases (IR or catalytic), CO2 (IR), toxic gases (electrochemical), solvents or freons (semiconductor) and asphyxiating gases (oxygen deficiency).

Fixed gas detector OLCT100
  • Detection of hydrocarbons, solvents, toxic gases, freons, VOC, CO2
  • Housing made of aluminium with epoxy paint (optional 316L Stainless Steel version)
  • Outputs: OLC100: Wheatstone bridge – OLCT100: 4-20 mA linear
  • Power supply: 15.5 to 32 VDC
  • ATEX & SIL 2 approved for catalytic and infrared versions
Additional information

Thanks to the wide variety of sensor technologies that can be used with this monitor, the OLCT100 fixed gas detector can detect a large range of gases. The combustible gases can be detected with a catalytic or infrared sensor, toxic gases with an electrochemical sensor, freons with a semiconductor sensor and carbon dioxide with an infrared sensor.

Two outputs types are available for this fixed gas detector range. The first one is the 4-20 mA analog output. It can be used to detect combustible, toxic and asphyxiating gases but also solvents, freons or carbon dioxide. The second output version is a Wheatstone bridge for the detection of combustible gases (0-100% LEL only).

Many accessories are available for the OLCT100 gas detector to improve sensor response time or to get optimal implementation.

The OLC/OLCT100 range is available under 5 versions:

  • OLC100 : Wheatstone bridge output detector to detect the combustible gases (0-100% LEL only)
  • OLCT 100 XP: Explosion-proof version equipped with a catalytic, electrochemical or semiconductor sensor to detect the combustible or toxic gases or oxygen.
  • OLCT 100 IS: Extremely reliable version to detect toxic gases or oxygen.
  • OLCT 100 XP IR: Explosion-proof version equipped with an infrared sensor to detect the combustible gases or CO2
  • OLCT 100 XP HT: High temperature explosion-proof version to detect combustible gases up to 200 °C
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CH4 respiratory protection - Methane

As methane is an asphyxiating gas featuring high risks of suffocation, it is recommended to wear an open circuit self-contained breathing apparatus (SCBA) or an air supplying respirator for long-term applications.

CEN-PAQ is very convenient and ideal for short interventions (15, 20 or 30 minutes), highly polluted environment applications or for emergency rescue in confined space or stale environment.

  • High visibility fireproof jacket with VELCRO fastener
  • Warning whistle and pressure gauge
  • Vision3, Promask or Panaseal full face masks
  • Stainless steel or composite compressed air cylinder
  • Compliant with EN137, EN136; EN139 standards
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Self-contained breathing apparatus – CEN-PAQ

CEN-PAQ is very convenient and ideal for short interventions (15, 20 or 30 minutes), highly polluted environment applications or for emergency rescue in confined space or stale environment.

Self-contained breathing apparatus CEN-PAQ
  • High visibility fireproof jacket with VELCRO fastener
  • Warning whistle and pressure gauge
  • Vision3, Promask or Panaseal full face masks
  • Stainless steel or composite compressed air cylinder
  • Compliant with EN137, EN136; EN139 standards
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Sigma self-contained breathing apparatus from SCOTT Safety combines highest respiratory protection levels to a cost-effective and user-friendly equipment to meet industrial and marine sectors requirements.

  • High performance pneumatic system
  • Ultra-compact demand valve triggered from first breath
  • Lighweight and ergonomic backplate and fireproof harness
  • Possibility to switch to demand constant flow
  • Large range of full face masks: Vision 3, Promask PP and Panaseal
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Self-contained breathing apparatus – SIGMA

Sigma self-contained breathing apparatus from SCOTT Safety combines highest respiratory protection levels to a cost-effective and user-friendly equipment to meet industrial and marine sectors requirements.

Self-contained breathing apparatus SIGMA
  • High performance pneumatic system
  • Ultra-compact demand valve triggered from first breath
  • Lighweight and ergonomic backplate and fireproof harness
  • Possibility to switch to demand constant flow
  • Large range of full face masks: Vision 3, Promask PP and Panaseal
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The M20.2 is the world’s smallest emergency escape breathing device (or EEBD). Compact, lightweight and ergonomic, it can be easily belt-mounted.

  • emergency escape breathing device M20.2
  • On use / stand-by duration : 15-20 minutes / 32 minutes
  • Donning time : less than 10 seconds.
  • Compact and lightweight: 18.3 x 16.5 x 7.9 cm – less than 1 kg.
  • Can be refurbished after use.
  • Compressed oxygen air supply.
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Emergency escape breathing device M20.2

The M20.2 is the world’s smallest emergency escape breathing device (or EEBD). Compact, lightweight and ergonomic, it can be easily belt-mounted.

emergency escape breathing device M20.2
  • On use / stand-by duration : 15-20 minutes / 32 minutes
  • Donning time : less than 10 seconds.
  • Compact and lightweight: 18.3 x 16.5 x 7.9 cm – less than 1 kg.
  • Can be refurbished after use.
  • Compressed oxygen air supply.
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FLITE respiratory protective equipment is well-suited for many industrial applications where the oxygen rate cannot be guaranteed.

  • Compressed air supply
  • Lightweight user-friendly harness with safety belt
  • Tempest positive pressure demand valve
  • Constant flow bypass function
  • Optional escape cylinder
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Airline respirator – FLITE

FLITE respiratory protective equipment is well-suited for many industrial applications where the oxygen rate cannot be guaranteed.

Airline system FLITE
  • Compressed air supply
  • Lightweight user-friendly harness with safety belt
  • Tempest positive pressure demand valve
  • Constant flow bypass function
  • Optional escape cylinder
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