Gas Detection FAQ’s

Gas detection is a vital but often overlooked aspect of life safety. In this article, we will answer some of the most frequently asked questions about gas detection. Whether you are a newcomer or an experienced professional, we hope our information will help you understand why gas detection is so important and how it functions.

Gas Detection Risk Assessment

What is gas detection, and why is it important?

Gas detection uses specialised equipment to identify and measure the presence of gases in the air. This process is essential for ensuring the safety of individuals and the environment in various industries, such as manufacturing, petrochemicals, and laboratories. Detecting harmful gases early can prevent accidents, protect lives, and minimise damage.


Do you need a gas detection system?

Yes, if a risk assessment deems, a gas detection system is necessary based on the outcome of a carried out to determine the chance of excessive exposure to gas to members of the public or employees.
This is a requirement of ‘The Management of Health and Safety at Work Regulations 1999’ and also the ‘Health and Safety at Work Act 1974’ Which is:

“To ensure, so far as reasonably practicable, the health, safety and welfare of all employees. In particular:
        a) Safe place of work.
        b) Safe working environment”

If there is a potential risk that can be identified in the workplace, then the employer has a responsibility to establish effective arrangements for planning, organising, controlling, monitoring and reviewing health and safety measures, as outlined in the HSE document HSG65 (The Framework for Health and Safety Management). In cases where the potential risk involves explosion, asphyxiation or poisoning from fugitive gas emissions, the control measure required by HSG65 normally results in installing a gas detection system.


How does gas detection equipment work?

Gas detectors employ various advanced technologies, such as electrochemical, catalytic bead, infrared, and photo ionisation, to precisely detect specific types of gases. The electrochemical sensors, for instance, confidently measure gas concentrations by generating a chemical reaction that produces an electrical current in proportion to the gas concentration.


What gases can be detected with gas detection equipment?

Gas detectors are devices that can sense the presence of various gases, such as methane, carbon monoxide, hydrogen sulphide, oxygen, ammonia, and volatile organic compounds (VOCs). The detector selection depends on the intended use and the kinds of gases in the surroundings.


How often should gas detectors be calibrated?

It is crucial to calibrate gas detectors regularly to ensure their accuracy. The intervals between calibration depend on various factors, including the type of sensor, environmental conditions, and the manufacturer’s recommendations. Generally, detectors should be calibrated every six months, but some may require more frequent calibration.


Are gas detectors portable or fixed?

Gas detectors are available in portable and fixed (or stationary) versions. Portable gas detectors are handheld devices that are ideal for personal monitoring or conducting spot checks in different locations. On the other hand, Fixed gas detectors are installed in specific areas to provide continuous monitoring. They can be connected to fixed alarm systems to ensure prompt response in case of gas leaks.


What are the key features to consider when choosing a gas detection system?

When selecting a gas detection system, factors to consider include the type of gases to be detected, the range and sensitivity of the sensors, response time, calibration requirements, and the overall durability of the equipment. These are all important when selecting the type of system to meet the specific needs of your application.


How can I ensure the proper maintenance of gas detection equipment?

It is essential to perform regular maintenance to keep gas detection equipment in good working condition. This maintenance should include regular calibration, replacing sensors as needed, checking for any physical damage, and following the manufacturer’s recommended maintenance procedures. Proper handling and storage of the equipment are also crucial to extend its lifespan. For this reason, it is always best to employ a competent gas detection company to ensure all services and maintenance are carried out correctly.


We hope these FAQs provide valuable insights into the world of gas detection. If you have additional questions or need further information, please feel free to contact our team at