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Hydrogen – H2

Find here the essential information on hydrogen – or dihydrogen(H2): characteristics, effects on health, detection devices & systems – hydrogen gas detectors – and proper respiratory protective equipment (self-contained breathing apparatus and supplied air respirator).

Hydrogen gas detectors and H2 respiratory protection

Hydrogen properties

Industrially produced by reforming hydrocarbons – natural gas steam reforming – hydrogen (H2) – also called dihydrogen – is mainly used to remove sulfur from petroleum fuels and to produce ammonia. It is also considered as the fuel of the future (fuel cells). It is primarily released while charging batteries or during welding.

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

Hydrogen gas hazards

Hydrogen (H2) is extremely flammable (R12) with wide explosive limits between 4 and 75% volume. As it is particularly lightweight, major hydrogen gas hazards are the replacement of oxygen in suspended ceilings and other high up confined spaces. Colorless and odorless, its presence cannot be detected without proper equipment. Even if it is not toxic, high concentrations of hydrogen will reduce the oxygen rate, which can lead to asphyxia. For all these reasons it is important to use an hydrogen monitor to detect dangerous concentrations.

Hydrogen gas detectors - H2

As hydrogen is not detectable through smell, only H2 gas detectors can accurately measure concentrations of this gas. Two hydrogen monitors technologies are available: either in toxicity with ppm measurement (slightly rare), or in explosivity with monitoring in percentage of the LEL (combustible gas detector).

The toxic gas detector GasBadge Pro ATEX series with interchangeable sensor. With a competitive price, this ATEX portable gas detector with interchangeable sensor combines power and flexibility.

  • Detection of Cl2, ClO2, CO, HCN, H2, H2S, NH3, NO2, O2, PH3, SO2.
  • Segmented LCD display for easy and direct reading
  • Internal data logging of alarm events and gas concentrations
  • CR2 3V lithium battery; 2,600 hours minimum runtime
  • Polycarbonate robust and waterproof housing
  • Additional information
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Portable toxic gas detector GASBADGE PRO

The toxic gas detector GasBadge Pro ATEX series with interchangeable sensor. With a competitive price, this ATEX portable gas detector with interchangeable sensor combines power and flexibility.

Portable gas detector GasBadge Pro
  • Detection of Cl2, ClO2, CO, HCN, H2, H2S, NH3, NO2, O2, PH3, SO2.
  • Segmented LCD display for easy and direct reading
  • Internal data logging of alarm events and gas concentrations
  • CR2 3V lithium battery; 2,600 hours minimum runtime
  • Polycarbonate robust and waterproof housing
Additional information

The GASBADGE PRO toxic gas detector is a classic single-gas detector. Its long-duration battery operates for about 2,600 hours and can be replaced when used. As for any other classic single-gas detectors, it is highly recommended to calibrate the GASBADGE PRO twice a year to ensure proper operation.

The GASBADGE PRO toxic gas monitor is a classic single-gas detector with interchangeable sensors and features a large range of electrochemical sensors. This technology is designed to detect toxic gases: Cl2 (chlorine), ClO2 (chlorine dioxide), CO (carbon monoxide), HCN (hydrogen cyanide), H2 (hydrogen), H2S (hydrogen sulfide), NH3 (ammonia), NO2 (nitrogen dioxide), O2 (oxygen), PH3 (phosphine) and SO2 (sulfur dioxide).

The GASBADGE PRO has 3 alarms: a powerful 95 dB audible alarm to alert even in noisy environments, a red LED visual alarm for view alert signals even in the darkest places like confined spaces and a vibrating alarm.

These alarms will be triggered by 4 events: if the lower or the upper limit values are reached, if concentrations get over the occupational exposure limit or if the average value threshold is exceeded. Abnormal gas concentrations and other data can also be saved and downloaded from the device.

Compact and lightweight, the GASBADGE PRO toxic gas detector is made with a strong polycarbonate housing with a robust and waterproof over-mold in compliance with IP67 protection. The GASBADGE PRO is ATEX approved as well for explosive atmosphere under current EU standards.

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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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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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ATEX gas detector with 4-20 mA linear output, display, 3 relays (alarm 1, alarm 2 and fault) and MODBUS communication. Detection of the combustible gases (IR or catalytic), CO2 (IR) or toxic gases (electrochemical).

  • Fixed gas detector XCD
  • Detection of combustible gases, CO, CO2, CH4, H2, H2S, O2
  • Power supply: 15.5 to 32 VDC with 4-20 mA relay output
  • Aluminium or IP 65 stainless steel housing
  • Approval: ATEX II 2G EExd ia d IIC T4
  • Integrated mounting plate with 3 mounting holes – 2 M20 cable gland entries
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Gas detector with display – XCD ATEX

ATEX gas detector with 4-20 mA linear output, display, 3 relays (alarm 1, alarm 2 and fault) and MODBUS communication. Detection of the combustible gases (IR or catalytic), CO2 (IR) or toxic gases (electrochemical).

Fixed gas detector XCD
  • Detection of combustible gases, CO, CO2, CH4, H2, H2S, O2
  • Power supply: 15.5 to 32 VDC with 4-20 mA relay output
  • Aluminium or IP 65 stainless steel housing
  • Approval: ATEX II 2G EExd ia d IIC T4
  • Integrated mounting plate with 3 mounting holes – 2 M20 cable gland entries
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H2 respiratory protection - Hydrogen

Hydrogen is an asphyxiating gas with important risks of suffocation. It is recommended to wear an opened-circuit self-contained breathing apparatus (SCBA) or an air supplying respirator for long-term interventions.

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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