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Find in this space our wide range of portable gas detectors for the detection of toxic gases, explosives, asphyxiants, refrigerant fluids (freons), and volatile organic compounds (VOCs). From the simple monogas detector to the multigas detector such as the very popular 4 gas detector,to the exotic gas detector through the all-new X-PID, a gas chromatograph for a selective measurement of VOCs (volatile organic compounds).

Most of our portable gas detectors are shipped on the same day thanks to a large number of devices available on stock and a responsive logistics service that delivers within 24 to 48 hours in metropolitan France or around the world.

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Toxic and flammable gas detection instruments are generally available in two versions: portable (on-site measurement) and fixed (permanently installed in one location). In a given application, the most appropriate solution depends on several factors: staff attendance at the area, site conditions, permanent or transient risk, required test frequency and, not least negligible, financial resources.

Why are portable gas detectors so important?

Portable gas detectors are part of personal protective equipment (PPE); they are designed to ensure the safety of staff in relation to gas-related risks but also to test areas at risk before entering them.

These small devices are essential in many areas that are supposed to be at risk because they are the only way to continuously monitor the operator’s breathing area, whether static or mobile.

Although fixed gas detection perfectly protects the operator, it cannot move with the operator, so the operator may be required to enter an area beyond the scope of the fixed detector’s action.

Many sites use a mixture of fixed and portable gas detection, but portable gas detection is sometimes used alone.

This choice can be motivated in a number of ways:

  • The operator is only required to enter the area very rarely, making fixed gas detection very expensive.
  • The area may be small or difficult to access, which does not allow for fixed gas detection
  • The application that requires detection may itself be mobile. For example, when a vessel carrying liquefied natural gas unloads its cargo, the dock is stationary while the cargo ship itself is mobile due to the movements of the sea

Breathing area

The breathing area is defined as the 25 cm/10 inch radius around the operator’s mouth and nose. A portable device can be attached to different locations in the breathing area: it can be attached to a jacket or chest pocket (but should not be placed in a pocket) or held in place by a helmet harness/clip. It is essential that the device is always properly secured.

Typical gas requiring portable detection

There are many environments and applications that require monitoring the detection of portable gases, and many toxic and flammable gases can intervene.

The most commonly detected gases include:

  • Carbon monoxide
  • Carbon dioxide
  • Hydrogen sulphide
  • Oxygen depletion
  • Flammable gases such as methane, liquefied petroleum gas and liquid natural gas
  • Ammonia
  • Sulphur Dioxide
  • Chlorine
  • Chlorine dioxide
  • Nitrogen oxide
  • Nitrogen dioxide
  • Phosphine
  • Hydrogen cyanide
  • Ozone
  • Various volatile organic compounds (VOCs) including acetone, benzene, toluene and xylene

Due to the variety of applications and the different processes implemented, many other gases can also be detected by portable devices.

Types of portable gas detectors

There are two main types of portable gas detectors:

  • Monogaz – devices designed to detect a gas
  • Multigas – devices designed to detect multiple gases. The variants are generally designed for 4 to 6 gases and combine different detection principles in a unit

In terms of continuous operation and maintenance, portable detectors are divided into two groups:

  • Permanent – this means that the device is a long-term solution requiring continuous maintenance that the operator can choose to perform in-house; it can also entrust it to a third-party provider
  • Disposable – this means that the device is a short-term solution (2 or 3 years) that requires no maintenance throughout its lifespan.

This type of device is often continuously operational from activation to shutdown.

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