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How do gas detectors work?

Gas detectors use a sensor to measure the concentration of certain gases in the atmosphere. The sensor serves as a reference point and scale, producing a measurable electric current when a chemical reaction caused by a specific gas occurs. This then sets off an alert/alarm on the gas detector that informs the operator to the level of particular gases. The operator can set parameter levels on the gas monitors to give off an alarm when a dangerous level of gas has been detected.

Gas detectors are generally categorized by the type of gas they monitor – combustible gas or toxic gas. Combustible gases are mainly detected using catalytic and infrared sensors, while toxic gases use electrochemical and metal oxide semiconductor technology.

What is a gas detector?

A gas detector is a fixed or portable device that detects the presence of gases in the atmosphere and is often used as part of a safety system. You can get different devices with different sensors to detect and monitor a range of gases, depending on the intended application.

How to use a gas detector

Our gas detection units come with a 'Quick Start Guide' that detail how to use the detectors properly, efficiently and most importantly, safely.

How many gas detectors do I need?

The number of required gas detectors would depend on the size of the area you are wanting to monitor. Each of our products details the range of each monitor/sensor. If you are still having trouble working out how many you would need, please get in touch with us and we will be able to assist.

Why use a gas detection unit/system?

The use of a gas detection/monitoring system, with appropriate action taken if dangerous levels of gases are detected, can help to prevent an explosion or can help to prevent worker injury or exposure to toxic gases. In some situations, the gas monitor is used for process control.

What is a fixed/portable gas detector?

A fixed gas detector is one that is plugged in/hard wired into the main power supply of a building, often composing of a main base unit and other sensor and alarm units placed in the required areas.

A portable gas detector is just that, you are able to carry it on your body which can be extremely useful and even life saving when entering certain/potentially dangerous areas.

What is VOC's in gas detection?

VOC's stands for Volatile Organic Compounds - Organic chemicals that have a high vapour pressure at ordinary room temperature. Breathing VOC's can irritate the eyes, nose and throat, can cause difficulty breathing and nausea, and can damage the central nervous system as well as other organs. Some VOC's can cause cancer.

Which gases can a gas detector detect?

Gas detectors can be used to detect combustible, flammable and toxic gases, and oxygen depletion. The most common gases that analyzers monitor are oxygen (O2), carbon dioxide (CO2), VOC's, Carbon Monoxide (CO) and water (H2O).

What to know about installing a gas leak detector

The main things to look for when deciding which is the best gas analyzer for your application are:

  • Which gas do I think could potentially be dangerous in my area?
  • Do I want a fixed or a portable gas detector?
  • What are the effects of that particular gas on a human and in what quantity?
  • What warning signs to look for when gas levels reach a dangerous level
  • How to safely clear the area of gas/clear the surrounding people

What to look out for when buying a gas leak detector

Be sure that you are purchasing the correct gas analyzer. It is vital that you are aware of the potential gases in any given area. If in doubt, please get in touch and we will be happy to help you decide what you need.

How to recognise a gas leak?

Some gases may be detectable by smell, however depending on the gas, the levels could have potentially reached a life threatening level before anyone has detected the gas leak. This strengthens the need for having the correct gas detection systems in place. All of our gas detection systems give clear audible and visual alarms and accurate gas reading levels, keeping you informed to make sure that the next decision, is the correct one.

What type of gas leak detector is best?

This completely depends on your intended application of where a gas analyzer is needed. Do you need a fixed system with the control panel on the outside of the room so that the sensors inside the room give you an accurate reading before you enter the room to ensure that the levels of gas are safe to enter? Do you need a portable version so that you can monitor the air quality and gas levels whilst you are working in a certain environment?

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