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Gas detection is an important part of home safety and an essential part of commercial and industrial safety systems. Gas detectors are also known as gas analysers, gas meters or gas leak detectors, and they all have the same main function which is to detect and monitor any hazardous gas leaks, oxygen depletion or the presence of emissions (toxic or flammable gases). You can find out more in our [gas detectors guide](/web/content/discovery/ideas-and-advice/gas-detectors-guide).

### Why would you need a gas detector?

A gas detection unit provides you with peace of mind and real-time 24/7 monitoring. They are available as handheld portable gas detectors or can be fixed or mounted to walls and ceilings. Gas detectors, such as carbon monoxide detectors, ensure the early detection of harmful gases, preventing health complications or even fatalities resulting from prolonged exposure. Many industries and residential building codes also require the installation of gas detectors to ensure compliance with safety regulations and standards.

### Gas Leak Detectors and CO2 Alarms

Gas leak detectors are specialised gas detectors designed to identify leaks in pipelines, tanks, or other gas-carrying systems. These detectors promptly alert users to the presence of gas leaks, allowing them to take immediate action to prevent potential accidents or hazardous situations.

Similarly, CO2 alarms are essential for monitoring and alerting occupants in confined spaces, laboratories, or areas where carbon dioxide is used or stored. They ensure that CO2 levels are within safe limits, preventing asphyxiation risks.

### How do they work?

There is a sensor inside the detector that will measure and monitor the concentration of certain hazardous gases that are in the air, and if gases are detected above a certain level which the sensor is set to, an alarm will be triggered for evacuation. The alarms can be audible, visual or both, to ensure that all individuals can be alerted for evacuation. The gas detector could also send a signal to the building operations department in industrial/commercial buildings so people are aware of the danger even if they are not in the affected area.

### What do they detect?

Gas detectors are categorised by the type of gas they detect; however, some are also multi gas detectors. Within this broad range, they are further defined by the technology they use:

- Catalytic and infrared sensors detect combustible or flammable gases
- Electrochemical and metal oxide semiconductor technologies generally detect toxic gases

Some common gases that can be detected are:

- Carbon Monoxide
- Chlorine
- Carbon Dioxide
- Ammonia Hydrogen Sulphide
- Methane
- Nitrogen Dioxide
- Butane Gas
- Natural Gas

### How do I maintain my gas detector?

Most gas detectors are battery operated for safety reasons, so it is important to perform regular checks on battery life and complete maintenance checks, the same way you would with a fire alarm.

### Are there any certifications to be aware of?

Some gas detectors will offer ATEX certification (Atmospheres Explosibles) which is an EU-regulated standard designed to ensure the safety of equipment or products being used in potentially explosive environments.



Discover the vital role of gas detectors in safeguarding your environment from gas detection to CO2 monitoring. Browse our latest gas detectors offers.

Gas Detectors | Carbon Monoxide Detectors | RS

Gas Detectors

RS PRO Workstation Gas Detection for Carbon Dioxide Detection

Kane KANE77 Personal Gas Detection for Carbon Monoxide Detection,...

DRAEGER Pac 6000 H2S Portable Gas Detector for H2S Detection ATEX Approved

Industrial Scientific Tango TX1 Portable Gas Detector for H2S...

RS PRO Pulse Oximeter for Oxygen Detection

RS PRO Handheld Gas Detector for Combustible Detection, Audible Alarm

Browse our latest Testo Gas Detectors offer. Place your order today for our Testo Gas Detectors.

Testo Gas Detectors | RS

<p>Gas detection is of paramount safety to any home, industry, or commercial setting. Testo has a range of gas detectors, all designed to detect any gas leaks, toxic gases, or a fall in oxygen levels. </p><h2>What are Testo Gas Detectors Used For? </h2><p>Testo gas detectors are instruments designed to identify gas leaks quickly and reliably. If gas is left undetected it can have enormous implications for the environment and costs, in the worst-case scenario gas leaks can cause problems to both human health and safety. </p><h2>How do Testo Gas Detectors Work? </h2><p>Testo gas detectors work from a sensor inside the unit, measuring and monitoring hazardous gas levels in the air. If these levels become too high, an alarm will be triggered, equally if the gas detector is a handheld unit the alarm function will activate if gas levels are too high. </p><p>Handheld gas detectors are an essential tool and very easy to operate. Some have a flexible probe which is attached to the instrument, this is ideal for using in hard-to-reach areas such as behind pipe work or other inaccessible areas. </p><p>Testo Gas Detectors Features:</p><ul><li>Harmful gases are detected quickly for safety</li><li>Peace of mind 24/7</li><li>Simple to use instruments with accurate readings</li><li>Alarm function to alert the user if high gas levels are detected</li><li>Flexible probe on certain devices for more difficult to reach places</li></ul><h2>Typical Applications:</h2><p>Gas detectors can be used across a host of applications and places, wherever gas it present. Gas detectors are categorised by the types of gas they detect, as well as multi gas detectors, so you can choose the right Testo gas detection tool for your requirements. </p><h2>How do I maintain my Gas Detector? </h2><p>Most gas detectors are battery operated and frequent checks on these batteries are an absolute essential, so the gas detector can do its job properly and keep everyone safe. </p>

Discover reliable oxygen detectors from RS. Ensure workplace safety with accurate monitoring. Shop now for top-quality gas detection equipment.

Oxygen Meters | RS

<p>Oxygen detectors are devices that measure the level of oxygen (O2) in the surrounding environment. Unlike pulse oximeters which measure blood oxygen levels, these detectors focus on the oxygen concentration in the air. Oxygen monitoring plays a vital role in various applications by ensuring safe oxygen levels for people and preventing fire hazards.</p><h2>Why use Oxygen Detectors?</h2><p>Detecting Oxygen Depletion - these are crucial for safety in environments where oxygen levels can become dangerously low. This can happen in confined spaces, at high altitudes, or near industrial processes that consume oxygen.</p><p>Detecting Oxygen Enrichment - in some situations, oxygen levels can become too high. This can be a fire hazard as concentrated oxygen can accelerate combustion. Oxygen enrichment is a risk in facilities that use oxygen therapy or industrial processes involving pure oxygen.</p><h2>Oxygen Detectors Features and Benefits:</h2><ul><li>Variety of types -available in portable and personal configurations depending on the application.</li><li>Alarms - Can be set to sound an alarm when oxygen levels fall outside the safe range.</li><li>Data logging - some models can store data on oxygen levels over time.</li><li>Ensures safety and protects workers and occupants from the dangers of oxygen deficiency or enrichment.</li><li>Improves air quality - helps maintain optimal oxygen levels in critical environments.</li><li>Compliance with regulations - many industries have regulations mandating the use of oxygen detectors in specific settings.</li></ul><h2>Applications:</h2><ul><li>Industrial settings - used in chemical plants, refineries, welding areas, and other places where oxygen levels can fluctuate.</li><li>Confined spaces - Important for firefighters, construction workers, and anyone entering enclosed spaces where oxygen depletion is a risk.</li><li>Aviation - used in airplanes, especially at high altitudes where oxygen levels are naturally lower.</li><li>Medical facilities</li></ul>

Find Honeywell gas detectors at RS. Stay safe with reliable monitoring. Shop now for top-quality gas detection solutions.

Honeywell Gas Detectors | RS

<p>Honeywell are a well-respected manufacturer of various gas detectors, like the Honeywell XC100D. These detectors are lifesavers in many situations.</p><h2>Why use a gas detector?</h2><p>Gas detectors are crucial for protecting yourself from harmful or even deadly gases that you might not even be aware of. They act as an early warning system, giving you precious time to escape a dangerous environment or take steps to mitigate the risk.</p><ul><li>Many detectors are compact and easy to carry around, making them suitable for various environments.&nbsp;</li><li>Real-time monitoring - these devices provide continuous information about the gas levels in your surroundings, allowing for immediate response if needed.</li><li>Alerts that can't be missed - most detectors come equipped with loud alarms and flashing lights to grab your attention in case of a gas leak.</li></ul>

Discover portable gas detectors at RS. Ensure safety with accurate monitoring. Shop now for reliable gas detection solutions.

Portable Gas Detectors | RS

<p>Portable gas detectors are handheld or wearable devices used to identify and monitor the presence of various gases in the air. They are vital safety tools in many industries and situations.</p><h2>Portable gas detectors are vital for several reasons:</h2><ul><li>Early Warning System for Invisible Threats - Many hazardous gases, like carbon monoxide or methane, are odourless and colourless and you wouldn't be able to detect them with your senses alone. Portable gas detectors act as an early warning system, alerting you to the presence of these dangers before they reach harmful levels. This gives you precious time to evacuate the area, take steps to mitigate the leak, or avoid entering a risky environment altogether.</li><li>Personal Safety in Various Environments - crucial for workers in a wide range of industries, including oil and gas, construction, firefighting, and chemical manufacturing. They also provide valuable protection for people who work in confined spaces, like sewage tanks or silos, where dangerous gas build up can occur.&nbsp; Even homeowners can benefit from having a portable carbon monoxide detector for their residences.</li><li>Versatility and Customisation - unlike fixed gas detection systems that are limited to a specific location, portable detectors offer greater flexibility.&nbsp; You can carry them around a worksite, take them into confined spaces, or use them for spot checks in different areas.</li><li>Real-time Monitoring for Informed Decisions - portable gas detectors provide real-time data on gas concentrations in the air. This allows you to make informed decisions about the situation's severity and the necessary course of action. You can assess if immediate evacuation is needed or if the level allows for controlled ventilation or leak repair.</li></ul><p>Overall portable gas detectors offer a crucial layer of protection against invisible threats, promoting safety in various environments and empowering individuals to take control of their surroundings.</p>

Discover carbon dioxide detectors for safety at RS. Reliable monitoring solutions. Shop now for top-quality CO2 detection equipment.

Carbon Dioxide Detector: Reliable Monitoring | RS

<p>Carbon dioxide detectors also referred as CO2 detectors, are valuable tools for monitoring and improving indoor air quality to ensure safety in your home, workplace, and other locations. They can be used to detect the presence of CO2 in areas such as residences, offices, factories, and public places.</p><h2>Why use a Carbon Dioxide detector?</h2><p>If you work in close-quarters and want to keep an eye on CO2 levels, CO2 detectors are the right choice. These versatile devices can monitor many different locations using different kinds of sensors. If CO2 levels exceed threshold limits, alarms, or sirens sound. With the alarm function, you can keep yourself safe from the risks of CO2 exposure, by triggering off an alarm as soon as the gas concentration exceeds a dangerous level.</p><p>While CO2 itself isn't highly toxic in low concentrations, it can be an indicator of poor ventilation. Here's how:</p><ul><li>Increased CO2, Decreased Oxygen - in poorly ventilated spaces, as CO2 levels rise, the amount of available oxygen decreases. This can lead to drowsiness, headaches, difficulty concentrating, and even dizziness or nausea at high CO2 concentrations.</li><li>Improving Indoor Air Quality - CO2 detectors can help you monitor indoor air quality and identify situations where ventilation might be inadequate. This is especially important in buildings with limited natural airflow or during periods of heavy occupancy.</li></ul><h2>Applications of CO2 detectors:</h2><p>Applications vary widely across manufacturing plants, factories, and laboratories where this warning system is installed to warn employees of high oxygen levels. While not directly related to safety hazards like fire or explosions, CO2 detectors have valuable applications in various settings:</p><ul><li>Buildings with limited ventilation - these include schools, offices, conference rooms, or densely occupied areas where fresh air circulation might be insufficient</li><li>Green buildings and energy efficiency</li><li>Agricultural applications &ndash; to help monitor CO2 levels and maintain optimal conditions for plants.</li></ul>

Find combustible gas detectors at RS. Ensure safety with accurate monitoring. Shop now for reliable gas detection solutions.

Combustible Gas Detectors | RS

<p>Combustible gas detectors are essential in environments where there's a risk of flammable gas leaks. They are designed to detect the presence of a variety of gases that can burn easily, alerting you to potential fire or explosion hazards.</p><p>Combustible gas detectors don't target specific gases but rather a lower explosive limit (LEL). The LEL is the minimum concentration of a gas or vapor in air that will allow combustion to occur in the presence of an ignition source.</p><h2>Common combustible gases that detectors can identify include:</h2><ul><li>Natural gas (methane) - the primary component of natural gas, methane is a highly flammable gas used for heating and cooking.</li><li>Propane - commonly used in liquefied petroleum gas (LPG) tanks for grilling, heating, and industrial applications</li><li>Butane - is a fuel gas found in cigarette lighters and camping stoves.</li><li>Hydrogen - this highly flammable gas is used in various industrial processes and fuel cells.</li><li>Gasoline vapours - fumes from gasoline storage tanks or spills</li></ul><h2>Additional points to consider:</h2><ul><li>LEL settings - some detectors can be adjusted to specific LEL ranges depending on the anticipated gas types in the environment.</li><li>Sensor types - these detectors typically use catalytic bead sensors that react to the presence of combustible gases.</li></ul>

Get carbon monoxide detectors for safety. Reliable monitoring solutions. Shop now at RS for top-quality CO detection equipment.

Carbon Monoxide Detectors | RS

<p>Basic carbon monoxide (CO) detectors are a highly affordable, easy to operate type of gas detector that no home, office or workplace should be without. More expensive models that also perform as precise and detailed carbon monoxide level monitors and readers are extremely useful for giving a fuller breakdown of atmospheric gas levels, including that of the potentially deadly carbon monoxide.</p><p>We supply carbon monoxide detectors from trusted brands such as Honeywell, Crowcon, SF Detection and Testo, as well as our own rigorously tested and highly accurate value carbon monoxide detector and reader products.</p><h2>What should you look for in a good carbon monoxide detector?</h2><p>Most basic models for home use only really need to have an alarm, a sensor and a battery indicator/test function in order to provide an effective early warning system for homeowners</p><p>More advanced models for professional or workplace use may benefit from additional features such as:</p><ul><li>Backlit LCD readout screens</li><li>Dual display readings for both CO and temperature</li><li>Full calibration to varying ppm scales</li><li>Max/Min/Average hold</li><li>Data hold</li><li>Low battery indication</li><li>Auto power off or disable function</li><li>Adjustable alarm tones and volumes</li></ul><h2>Why is carbon monoxide particularly dangerous?</h2><p>Carbon monoxide (CO) is a deadly toxic gas that has no smell and cannot be seen or tasted when present in the air. Exposure to carbon monoxide gas is lethal at even low levels, and over shockingly brief exposure times it can quickly cause illness, impaired judgement leading to accident and injury, and ultimately death.</p><p>The most common sources of detectable carbon monoxide readings in homes, workplaces and other inhabited buildings are:</p><ul><li>Poorly installed or maintained heating appliances</li><li>Chimneys and flues</li><li>Gas-fired cooking appliances and other machinery</li><li>Improperly filtered combustion engine and exhaust setups</li></ul>

Find Methane gas detectors for safety at RS. Reliable monitoring solutions. Shop now for top-quality CH4 detection equipment.

Methane Gas Detectors | RS

<p>Methane gas detectors are a specific type of gas detector designed to identify and measure the presence of methane (CH4) in the air. Methane, the main component of natural gas, is both flammable and odourless, making it a potential safety hazard. These detectors play a crucial role in preventing explosions and ensuring safety in various environments.</p><h2>Applications of methane gas detectors:</h2><ul><li>Oil and gas industry - throughout the exploration, production, transportation, and storage of natural gas, methane detectors are crucial for identifying leaks and preventing explosions.</li><li>Landfills generate methane gas as organic waste decomposes. Detectors help monitor methane levels to prevent migration and potential explosions.</li><li>Wastewater treatment plants can also produce methane. Detectors ensure safe working conditions and prevent environmental releases.</li><li>Coal mines - methane is a common gas found in coal seams. Detectors are essential for safeguarding miners from explosions and ensuring proper ventilation.</li><li>Agriculture - manure storage facilities can generate methane. Detectors help farmers monitor levels and manage manure safely.</li><li>Homes - for residences with natural gas appliances or located near gas pipelines, having a methane detector can provide an extra layer of safety in case of leaks.</li></ul>

Discover personal gas detectors for safety at RS. Reliable monitoring solutions. Shop now for top-quality personal gas detection equipment.

Personal Gas Detectors | RS

<p>Personal gas detectors or clip-on detectors are wearable or handheld devices designed to keep you safe from exposure to hazardous gases in your immediate surroundings. These small gas detectors offer a vital layer of protection in various situations.</p><h2>Why are personal gas detectors important?</h2><ul><li>Early Warning System - many harmful gases, like carbon monoxide or hydrogen sulfide, are odourless and colourless and cannot be detected with your senses alone. Personal gas detectors alert you to the presence of these dangers before they reach harmful levels. This gives you precious time to evacuate the area, take steps to mitigate the leak, or avoid entering a risky environment altogether.</li><li>Personal Protection - you can carry them with you throughout a worksite, take them into confined spaces, or use them for spot checks in different areas.</li><li>Real-time Monitoring for Informed Decisions - provide real-time data on gas concentrations in the air around you.</li></ul><h2>Applications of personal gas detectors:</h2><p>Personal gas detectors find use in a wide range of applications where workers or individuals might encounter hazardous gases:</p><ul><li>Industrial workers - personnel in oil and gas refineries, chemical plants, manufacturing facilities, and other workplaces where hazardous materials are handled rely on personal detectors for protection.</li><li>Emergency responders - firefighters, hazmat teams, and other emergency personnel use them to identify and assess gas leaks or dangerous atmospheres during emergencies.</li><li>Construction workers - these detectors can help identify gas hazards in confined spaces like tunnels, trenches, or excavations before workers enter.</li><li>Utility workers - gas line technicians and other utility personnel can use them to detect leaks and ensure safety during maintenance or repairs.</li><li>Environmental professionals - detectors can be used to monitor air quality for pollutants or track specific gases relevant to environmental assessments.</li></ul><p>By continuously monitoring gas levels around you, personal gas detectors empower you to take control of your safety and make informed decisions in potentially hazardous situations.</p>

Explore Industrial Scientific gas detectors at RS. Ensure safety with reliable monitoring. Shop now for top-quality gas detection solutions.

Industrial Scientific Gas Detectors | RS

<p>Industrial Scientific is a leading manufacturer of portable and area gas detectors used in various industries to keep workers safe from hazardous atmospheres. These detectors are built with durability and reliability in mind for the demanding environments they are used in.</p><h2>Portable Gas Detectors</h2><p>These are handheld or wearable devices designed for personal protection. They can monitor for a variety of gases, including combustible gases, oxygen, and toxic fumes. Some popular models include the Tango TX1 and Ventis Pro.</p><h2>Area Monitors</h2><p>These are fixed gas detection systems designed to continuously monitor a specific area for the presence of hazardous gases. They can be used to provide early warning of leaks or spills and can be linked to alarm systems to evacuate personnel if necessary. Industrial Scientific offers area monitors like the Radius BZ1.</p><p>By providing real-time monitoring of gas levels, Industrial Scientific detectors help to prevent accidents, fatalities, and environmental damage.</p>

Discover Kane gas detectors at RS. Ensure safety with reliable monitoring. Shop now for top-quality gas detection solutions.

Kane Gas Detectors: Reliable Monitoring | RS

<p>Kane gas detectors are known for their portability and ease of use and are essential safety tools in many industries and situations where there's a risk of exposure to hazardous gases.</p><h2>Kane gas detectors features include:</h2><ul><li>Portable - many Kane detectors are small, lightweight, and easy to carry around, making them suitable for spot checks or use in confined spaces.</li><li>Easy to use - these detectors typically come with clear instructions and user-friendly interfaces, allowing people with no prior experience to operate them effectively.</li><li>Audible and visual alarms - in case of a gas leak, Kane detectors will sound an alarm and display a visual indicator to get your attention and prompt you to take necessary action.</li></ul><p>Having a Kane gas detector can provide an extra layer of safety and peace of mind in various situations.&nbsp; Whether you're a homeowner concerned about carbon monoxide leaks, a worker in an industry with potential gas hazards, or someone who frequently needs to check for refrigerant leaks, a Kane detector can be a valuable tool in your safety kit.</p>

Explore Kimo gas detectors at RS. Ensure safety with reliable monitoring. Shop now for top-quality gas detection solutions.

Kimo Gas Detectors: Reliable Monitoring | RS

<p>KIMO gas detectors are essential tools that monitor the levels of certain gases in the air including CO, CO2, refrigerant gases (HFCs, HCFCs, CFCs) and hydrogen. These detectors are usually battery operated and are easy to carry around, making them suitable for various environments.</p><p>Most devices come equipped with loud alarms and lights to grab your attention in case of a gas leak and provide continuous information about the gas levels in your surroundings, allowing for immediate response if needed.</p>

Get portable carbon monoxide detectors for safety. Reliable monitoring solutions. Shop now at RS for top-quality CO detection equipment.

Portable CO Detectors: Safety Monitoring | RS

<p>Portable Carbon Monoxide detectors are devices designed to detect carbon monoxide (CO) gas in the air. Carbon monoxide is a colourless, odourless gas that can be produced by incomplete combustion of carbon-based fuels such as wood, gasoline, natural gas, propane, and oil. When inhaled, carbon monoxide can be extremely dangerous, even fatal, as it interferes with the body's ability to transport oxygen.</p><h2>Features of portable CO detectors:</h2><p>Portable CO detectors typically consist of a sensor that detects CO gas, an alarm (audible and/or visual) that activates when CO levels exceed a certain threshold, and a power source such as batteries. They come in various forms, including handheld devices, wearable devices, and combination devices that may also detect other gases like methane or propane.</p><p>Wearable CO detectors are available specifically for personal use. These wearable detectors are compact, lightweight devices that can be clipped onto clothing or worn as a pendant or wristband. They typically feature a small sensor that continuously monitors the surrounding air for carbon monoxide gas. These personal CO detectors are commonly used by individuals who work in environments where carbon monoxide exposure is a risk, such as construction sites, warehouses, garages, and industrial facilities.</p>

Explore Dräger gas detectors at RS. Ensure safety with reliable monitoring. Shop now for top-quality gas detection solutions.

Dräger Gas Detectors: Reliable Monitoring | RS

<p>Dr&auml;ger gas detectors are vital tools and are used by a wide range of professionals who work in environments with potential exposure to hazardous gases like carbon monoxide, hydrogen sulphide or combustible gases.</p><h2>Dr&auml;ger gas detectors have a wide range of applications, including:</h2><ul><li>Personal protection - these detectors are worn by individuals to monitor their immediate surroundings for hazardous gases or combustible gases.</li><li>Confined space entry - before entering confined spaces, workers use gas detectors to ensure safe oxygen levels and the absence of harmful gases.</li><li>Leak detection - Dr&auml;ger detectors help identify leaks of flammable or toxic gases in pipelines, storage tanks, and other industrial equipment.</li><li>Area monitoring - these detectors can be used to monitor larger areas for the presence of specific gases, helping to identify potential hazards or track air quality.</li></ul><p>By continuously monitoring gas levels, Dr&auml;ger detectors provide real-time data that allows workers and professionals to make informed decisions about their safety and the safety of those around them.</p>

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