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Gas Detectors

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Gas Detectors

Gas Detectors – Fixed And Portable. Single And Multi-gas.

Thorne & Derrick Are Distributors Of Gas Detectors

Gas detectors are used to detect and alert of the danger of harmful gases that occur in many workplace situations. Simply, gas detectors save lives by providing advanced warning, usually via an audible beep or alarm, of the presence of gas – Thorne & Derrick distribute Crowcon and Drager gas detectors.

Gas detection devices are available in many variants for different applications. Typically, gas detectors are divided into fixed and portable and single or multi-gas. These variants allow the user to select the correct gas detector for their individual requirements to protect plant and personnel.

Many industries face the threat of harmful gases on a daily basis. Industries such as oil and gas, petrochemical, food and drink, utilities, construction and highways all face gas and require gas detectors for their safety.

Gas detection and gas detectors have been around and used in various forms for hundreds of years. The very first methods of detecting gas were in mines and this was a much more primitive way of detecting gas than the sophisticated detectors used today.

Around the time of the industrial revolution in Britain, fuel was extremely important in keeping the country running and developing. This fuel was mined and resulted in miners facing the threat of gas exposure.

To detect gas, the mine would be cleared and one miner would have the job of walking into the mine with a damp towel or sheet draped over him and walking with a long wick with a light on the end. If he came into any pockets of gas, typically methane, they would ignite and the damp cloth over his head would protect him.

Today gas detectors have developed to become sophisticated electronic devices with much higher levels of accuracy and protection.

Whether using a small portable gas detector for a construction worker working on many sites daily, or a fixed gas detector in a hazardous area zone, Thorne & Derrick gas detector engineers can specify your gas detector to meet your individual requirements.

T&D Gas Detectors - Detecting A Wide Range Of Gases

T&D Gas Detectors – Monitoring A Wide Range Of Gases

When selecting the correct gas detector, it is important that the correct type of sensors are specified to avoid any cross contamination or poisoning of sensors. Some gases will contaminate the sensor or chemicals such as silicone being used in the working environment could also damage the sensor.

This will effectively make the gas detector redundant with potentially fatal consequences.

Gas Detectors & The Different Methods Of Detection

There are a number of different methods of gas detection with many being devised for specific applications and industries. The first method is a catalytic combustible detector where a heated catalytic bead is used to burn less than combustible concentrations of combustible gases.

As the gases burn the wire in the bead heats up. As the temperature increases so does the resistance in the wire. Using a wheatstone bridge, this temperature increase is compared against a reference (non-catalytic) bead to give a combustible gas reading.

Secondly there is the electro-chemical method of detection where sensors use two or more electrodes in an electrolyte to either oxidise or reduce a chemical. Electro-chemical sensors are commonly used in the detection of oxygen, and of toxic gases.

Photo Ionization Detectors are another method of detection and becoming more popular in usage. a beam of ultraviolet light is used to temporarily displace an electron from a chemical creating an ion. The electrical current formed as this ion reforms with an electron is measured to give a concentration reading.

Don’t take the risk when specifying gas detection equipment, always ask the experts.  

The Importance Of Correct Gas Detector Selection In the Offshore Industry

Horizon Offshore Deep Water Oil Spill Disaster

Horizon Offshore Deep Water Oil Spill Disaster

Gases such as Methane occur in many situations and if left un-detected and un-resolved can cause huge damage from explosions to asphyxiation. In the offshore industry, there are two main types of detector that are commonplace – fire & heat and gas.

Gas detectors provide the earliest signals and warnings of harmful gases in an industry that is typically isolated on a platform, hundreds of miles off the mainland coast.

The deepwater horizon explosion was caused by methane gas bubbles shooting up the drill column resulting in large explosive blast that killed 11 workers and led to more than 3m gallons of crude oil pouring into the Gulf. Adequate gas detection and flame detection may well have saved the lives of those that were tragically injured fatally in this disaster.

The Importance Of Gas Detection In The Offshore Industry

The Importance Of Gas Detection In The Offshore Industry

Crowcon Portable And Fixed Gas Detectors Can Be Installed And Used To Detect Methane Gas

Crowcon Portable And Fixed Gas Detectors Can Be Installed And Used To Detect Methane Gas In The Offshore Industry

Video: BW Technologies Gas Detectors by Honeywell Products

BW Technologies gas detection solutions provide dependable, high performance gas detector solutions backed by years of product research and industry experience. BW Technologies design and manufacture innovative gas detection solutions for many industries globally, providing single and multi-gas detectors.

T&D distribute for a range of gas detectors manufacturers including BW Technologies, Honeywell, RAE Systems, Drager And Crowcon providing portable and fixed gas detectors.

T&D Gas Detector Engineers Can Specify The Correct Gas Detector

There are many gas detectors available on the market and selecting the correct product is absolutely key to ensuring personnel safety and maintaining plant integrity. Individual worker situations and working conditions need to be taken into account when selecting a gas detector product.

Knowing the site risks is the first key element in selecting a gas detector as it is the site risk assessment that will highlight exactly the working conditions, potential hazards and whether there is likely to be an oxygen deficiency which will pose a threat to personnel.

Identifying the prime objective is also key as this looks at the processes that will be completed. In addition locating where gases are likely to come from, the location and ease of worker operation also helps determine which gas detector is appropriate.

Finally highlighting exactly which gases should be detected and identifying the potential source of a gas release as this helps determine the number and location of detectors required for a fixed gas detection system.

Avoiding Carbon Dioxide (CO2) Hazards In The Brewing Industry

Throughout the brewing and beverage industry, Carbon Dioxide (CO2) is used for the carbonation of drinks, giving them their familiar fizz and making drinks what they are. Without Carbon Dioxide lager would not have its recognisable ‘head’ and many well known beverages would be un-recognisable to many.

Excessive levels of CO2 can cause dizziness and even asphyxiation posing a new threat to workers and making it even more important to monitor this deadly gas. Typically fixed gas detectors will be installed in large rooms where brewing is taking place and the threat from Carbon Dioxide is present.

For other applications and personnel that are moving between rooms, portable gas detectors are used to alert of the presence of CO2.

Carbon Dioxide Gas Detection In The Brewing Industry

Carbon Dioxide Gas Detection In The Brewing Industry

T&D Food & Beverage Products - Click For Further Information

T&D Food & Beverage Products – Click For Further Information


Q1/ Why use a gas detector?

A1/ Gas detectors not only save lives by providing advanced warning of deadly gases but also reduce costs and help companies comply with legislation and safety standards.

Q2/ How many sensors do I need and where should i place them?

A2/ There is absolutely no rule set for the amount of gas detectors that are required – this depends upon individual working conditions. Contact T&D today to discuss your requirements and receive help and advice on which gas detectors to use.

How Can T&D Help?

T&D are UK distributors for main gas detector brands such as Crowcon, Drager, Honeywell, BW Technologies and RAE Systems.

Our sales advisers and gas detector experts can help you specify exactly which product you require and can provide product advice and assistance.

Do not take a risk with your personnel and equipment, let T&D help you find the correct product today.



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