
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 sensors, 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).

### **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 Australian residential building codes also require the installation of gas detectors to ensure compliance with safety regulations and standards.

### **Gas Leak Detectors and CO2 (Carbon Dioxide) 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 Gas Detectors Work?**

Gas detectors function by employing various sensing technologies that react chemically or physically with specific gases to produce a measurable signal.

For instance, catalytic and infrared sensors are designed to detect combustible or flammable gases by measuring changes in heat or light absorption upon gas exposure.

Conversely, electrochemical and metal oxide semiconductor technologies generally detect toxic gases by measuring changes in electrical current or resistance caused by the gas interaction with the sensor material.

### **Measurement Process**

There is a sensor inside the detector that will measure and monitor the concentration of certain hazardous gases that are in the air. Depending on what the sensor is specifically set to, the detector trigger an alarm when gases are detected above a certain level.

This detection often results in a change in electrical current, resistance, or light absorption within the sensor that is proportional to the gas concentration, allowing the detector to quantify the level of the hazard.

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.

There are also different types of monitoring. Continuous real-time monitoring is provided by some gas detectors, offering immediate alerts to hazards, while others, especially portable gas detectors, may be used for periodic checks to assess gas levels in specific locations.

## **What Do Gas Sensors Detect?**

Gas detectors are categorised by the type of gas they detect; however, some are also multi-gas detectors. 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.

## **Related Certifications of Gas Detector Units**

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.

## **Avoid Common Mistakes When Purchasing Gas Sensors**

To ensure [workplace safety](https://au.rs-online.com/web/content/discovery/ideas-and-advice/workplace-on-site-safety-guide), understanding the specific requirements of your application is paramount when purchasing gas sensors and gas leakage detectors. Here are some common mistakes to avoid:

- **Underestimating the importance of the target gas and environment:** Failing to accurately identify the specific gases you need to detect and the environmental conditions (temperature, humidity) can lead to selecting an unsuitable sensor.
- **Overlooking calibration and maintenance requirements:** Neglecting to consider the necessary calibration frequency and maintenance procedures can result in inaccurate readings and compromised safety over time.
- **Ignoring the sensor lifespan and replacement costs:** Not factoring in the expected lifespan of the sensor and the cost of replacement can lead to unexpected expenses and potential gaps in monitoring.

## **Applications of Gas Detectors**

Gas detectors are crucial safety devices with numerous applications across different industries, such as:

### **Discrete Manufacturing**

In discrete manufacturing, gas detectors are used to monitor for leaks of gases used in various processes, such as welding fumes or gases used in specific machinery, ensuring a safe working environment for personnel.

### **Process Manufacturing**

In process manufacturing, gas detectors are vital for monitoring various stages of production where flammable or toxic gases might be present. In environments with controlled humidity, a [hygrometer](https://au.rs-online.com/web/content/discovery/ideas-and-advice/hygrometers-guide) can complement gas detection to ensure optimal and safe conditions.

### **Energy & Utilities**

Gas detectors are extensively used in the energy and utilities sector to detect leaks of natural gas (natural gas leak detector), hydrogen, or other flammable gases in power plants, pipelines, and storage facilities, preventing potential explosions.

### **Facilities & Intralogistics**

In facilities and intralogistics, gas detectors can be used to monitor for the presence of carbon monoxide from forklifts or other combustion-powered equipment, ensuring workplace safety in enclosed areas.

## **Your Trusted Gas Detectors Supplier & Manufacturer**

RS is your reliable source for durable and quality gas detectors in Australia. We stock an extensive range from industry leaders like [DRAEGER](https://au.rs-online.com/web/b/draeger/), [KIMO](https://au.rs-online.com/web/b/kimo/) and [RS PRO](https://au.rs-online.com/web/b/rs-pro/). Our selection spans various types and sizes at competitive prices, ensuring you find the perfect gas detection unit for your application.

We also carry other essential environmental test and measurement equipment, such as [anemometers](https://au.rs-online.com/web/c/test-measurement/environmental-test-measurement/anemometers/) and [vibration meters](https://au.rs-online.com/web/c/test-measurement/environmental-test-measurement/vibration-meters/), to provide comprehensive solutions for environmental monitoring and safety. Buy portable gas detectors and other accessories online today. For more details on our ordering process, delivery services, and delivery fees, please refer to our [Delivery page](https://au.rs-online.com/web/content/support/all-articles/delivery).



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