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Gas monitoring for tunnels and underground

Road and railroad tunnels are considered as closed or partially closed structures. They feature same risks and hazards than interventions in confined spaces, such as oxygen deficiency and potential presence of combustible or toxic gas or vapor.

détecteur gaz et masque auto sauveteur pour travaux en tunnels

A confined space is a closed or partially closed structure and most of severe or lethal accidents that occur while entering these areas are linked to combustible, toxic or asphyxiating (lack of oxygen) gases. Ce seront donc les premiers risques à évaluer dans le cadre de l’élaboration d’une procédure de travail avec des appareils de détection de gaz dans les tunnels.

GAS EXPOSURE IN TUNNELS

Chronic exposure to exhaust gases can cause severe neurological disorders (headaches, dizziness, irritability, drowsiness, convulsions), bronchial irritations or even lungs cancer in some cases. It is thus essential to permanently measure and control TWA (time weighted average) and STEL (short term exposure limit) exposure values in road and railroad tunnels for:

  • Carbon monoxide
  • Carbon dioxide
  • Nitrogen oxides (nitric oxide and nitrogen dioxide)
  • Sulphur dioxide
  • Volatile organic compounds (VOC) including benzene
  • Oxygen defficiency

GAS DETECTION FOR TUNNELS

Multigas detector and area gas monitor

Concerning personal protection, a multigas detector remains essential and indispensable. In addition, a gas area monitor will secure the working area. For very long tunnels, it will be advisable to use units with communication solutions as explained below…

LENS Wireless technology

Particularly suitable for tunnels, the LENS™ Wireless technology is a new way to approach safety. With this technology, once a detector or an area gas monitor enters in alarm following a gas hazard, a « man in distress » alarm or a panic situation, every paired detector will get instant alert.

Go to « LENS Wireless technology » page

respiratory protection and self-rescuer mask

Self-rescuer masks a respiratory protective devices especially designed for emergency evacuation in non-breathable atmosphere – poorly oxygenated, smoky or extremmely toxic areas – for use when an air purifying respirator would be unefficient or hazardous. They originally have been designed for emergency evacuations from mines or long tunnels.

GAS DETECTION AND RESPIRATORY PROTECTION FOR TUNNELS

The most commonly used and the most cost-effective unit for confined space applications is the 4 gas detector (combustible gases, O2, CO and H2S). Yet for tunnels it advisable to use a multigas detector with CO-CO2-NO-NO2-O2 sensors. For emergency evacuation, a self-rescuer respirator remains indispensable!

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

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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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.

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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MX4-EXPLO combustible gases detector (explosimeter)

ATEX modular explosimeter to monitor combustible gases (natural gas, butane, propane, hydrocarbons, solvents…) with the opprtunity to add additional O2, CO, H2S sensors.

MX4-EXPLO combustible gases detector (explosimeter)

ATEX modular explosimeter to monitor combustible gases (natural gas, butane, propane, hydrocarbons, solvents…) with the opprtunity to add additional O2, CO, H2S sensors.

Portable gas detector MX4-Explo
  • Gas detection: combustible gases from 0 to 100 % LEL
  • Polycarbonate materials with robust and waterproof overmold.
  • Audible (95 dB at 30 cm), visual and vibrating alarm.
  • Longlenght battery, 12 hours continuous.
  • Optional slide on pump to draw samples.
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Self-rescuer SCSR OXY 3000/6000

Well-suited for emergency evacuation from confined spaces, the OXY 3000/6000 is a SCSR self-contained self-rescue device that chemically produces breathable air. Different versions offer from 30 up to 60 minutes autonomy.

  • drager SCSR oxy 3000 6000 oxygen self rescuer for emergency escape

Self-rescuer SCSR OXY 3000/6000

Well-suited for emergency evacuation from confined spaces, the OXY 3000/6000 is a SCSR self-contained self-rescue device that chemically produces breathable air. Different versions offer from 30 up to 60 minutes autonomy.

drager SCSR oxy 3000 6000 oxygen self rescuer for emergency escape
  • Up to 60 minutes autonomy.
  • Shock absorbent shell to protect the device.
  • Safety Eye for easy visual safety check.
  • Dimensions: 265 x 217 x 125 mm for less than 4 kg.
  • Approved in compliance with SA 89/686/CEE DIN EN 13794 standards and Australian coal mining.
  • Storage shelf life up to 10 years.

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