Portable 4 gas detectors (Flammable gases, O2, CO & H2S)

The 4 gas detectors represent a very large majority of the portable gas detectors market in the industry or the tertiary sector. They simultaneously detect flammable gases (Lower Explosive Limit), carbon monoxide (CO), hydrogen sulfide (H2S) and lack of oxygen (O2) in the ambient air. These are the most versatile multi-gas detectors on the market; they are also recommended (and required) for CATEC training (certificate of competence to work in confined spaces in the water and sanitation sector).

Portable multi-gas detectors (explosive gases, O2, CO, H2S)

4 gas detector in confined spaces

Many industrial accidents involve interventions in confined spaces, the main risk being generated by the latent or accidental presence of a toxic, flammable or simply oxygen-depleted atmosphere.

Recommended for interventions in confined spaces as part of CATEC training, 4-gas detectors simultaneously detect explosive gases (natural gas, LPG, hydrocarbons, alcohols and solvents), oxygen (or rather the lack of oxygen), carbon monoxide (CO) and hydrogen sulfide (H2S). They control the ambient air and alert the interveners in presence of the following risks: 

  • Risk of asphyxia, anoxia or hypoxia: transient or permanent absence of oxygen;
  • Risk of intoxication: inhalation or absorption of toxic gases such as hydrogen sulfide (H2S), carbon monoxide (CO) or carbon dioxide (CO2);
  • Explosion and fire: presence of flammable gases (methane in this case) that can cause fire and explosion risks.

CATECĀ® Training

With nearly 35,000 workers in the water treatment and sanitation sector, the CATECĀ® has become a necessity for safety at work. It is based on the elements of the recommendations R447 of June 25, 2009 and R472 of November 19, 2012. These recommendations suggest a common training base for workers and supervisors in the sanitation and water treatment sector. 

 In order to ensure the safety and health of the worker required to intervene in a confined space, this device defines at least the methods, the instructions to be respected and the safety equipment essential for all interventions such as a 4 gas detector for measurement and the control of the ambient air, a self-rescue mask for the emergency evacuations, a fall protection equipment and a device of ventilation and air extraction.

Maintenance and calibration of 4 gas detectors

Like all gas detectors, the 4-gas detector is a safety device that must be periodically maintained and checked, such as a calibration gases standard . This operation consists of exposing the device to a known gas concentration for a given time and validating it as a reference point for future measurements.

GazDetect's "Included maintenance" solution is a simple and economical concept which consists in providing the maintenance and the periodical checks of the device during two or three years depending on the model at the time of its purchase. It is an "all inclusive" version adapted to gas detection where EVERYTHING is included, even the return transport of the device.