The Future of Connected Safety

Connected safety is becoming a popular phrase in health and safety settings generally, and gas detection in particular. That’s a good thing – because it’s no overstatement to describe connected safety as an evolutionary step in gas monitoring and protection, and it’s a field that is developing all the time.

In this post we’ll establish exactly what connected safety means for anyone monitoring gas hazards, and find out why it pays to take note of developments in this area.

What is Connected Safety?

In gas monitoring terms, connected safety refers to using the internet of things (IoT) to connect gas detection devices (for example, portable gas monitors) to software that pulls the gas exposure information and other data stored on the detector (the identity of the user for any given session, the extent to which the device was used correctly, etc.), analyses it and presents it in useful forms.

By wirelessly connecting each gas monitor – and the data it collects during each work session – to a specialist software package, you can spot patterns of gas exposure, patterns of use and misuse of detectors and automatically store all of the information you need to quickly prove regulatory and legal compliance.

When this information is scaled up across entire device fleets, naturally the data it produces also scales up and can be aggregated. And if that data is acted upon, it can improve safety across your business and drive better, more informed decisions.

That is, in a nutshell, how our Crowcon Connect solution works.

How does Crowcon Connect work for Connected Safety?

Crowcon Connect is Crowcon’s own software, which works with all current (manufactured from 2004 onwards) and future Crowcon portable gas detectors. Because we own and develop the software, we are constantly upgrading it in light of customer feedback and can make customised versions where required (although it’s also really easy for users to configure the standard dashboard to suit their own needs).

Quick User Assignment easily links devices, events and people

For each work session, anyone who needs a portable detector simply scans in their ID (for example, their work ID badge) and is allocated a device. If they don’t like that device (for example, if it’s not suitable for the job in hand) they can simply re-scan their badge to be assigned another detector.

When the user returns the detector to its dock at the end of the work session, the dock transfers the data to the Crowcon Connect portal while simultaneously un-allocating the device, ready for the next user.

The data transferred to the portal includes details of the user and the device, exposure and alarm information and a full range of gas data. Once that data reaches the portal, Crowcon Connect can crunch the numbers and work its magic.

Connected Safety streamlines processes, improves outcomes

The Crowcon Connect user interface is very intuitive and easy to customise, which means every user can see precisely the information that matters to them, whenever and wherever they need it.

For example, it becomes very straightforward to prove regulatory compliance when real-time data is available, and easy to spot potentially dangerous areas when alarm data begins to cluster. Mundane tasks – such as flagging those detectors that are due for calibration and/or maintenance – can be automated, which saves time and reduces the risk of human error.

Of course you can also aggregate fleet-wide, site-wide and/or team-wide data, which lets you to spot patterns (for example, of exposure events or device losses) and make relevant changes. This helps you to improve your site and workforce safety, and you can always locate detectors (and any workers attached to them) in real time.

Is Connected Safety the way of the future?

In a word, yes. We live in a data-driven world and the use of information is driving improvements in all sectors, gas detection included. Our increasing (and increasingly widespread) reliance on technology is only going to amplify that.

After all, data can do much to offset the shortcomings of human management. Data is objective, not driven by assumptions or bias, and gives an honest reflection of what is actually happening in the field, rather than what is intended to happen. If you’ve ever worn a fitness tracker for a while, you’ll get this idea!

However, data analytics are only useful if they are based on top quality, current information – and that’s where connected safety comes in. Connected safety applications collect information accurately and in real time. If you manage gas monitoring, with data straight from the device you will be operating on the basis of objective, trustworthy information. What is more, you can use that information to make people safer – and even save lives.

We’ll be sharing some more posts about connected safety in the coming weeks, so please come back to this page for those. In the meantime, why not have a look at our white paper on connected safety for more detailed information, or check out our Crowcon Connect pages?

Oxygen Depletion Risks from Nitrogen in Pharmaceutical Processing

Within the air, a normal concentration of oxygen is 21%, while nitrogen makes up 78% of the rest of the atmosphere along with some trace gases. Inert gases such as nitrogen, argon and helium although aren’t toxic, they do not help to support human breathing. These are odourless, colourless and tasteless making them undetectable. An increase in the volume of any other gases that are not oxygen can lead to a circumstance in which individuals may be at risk of asphyxiation which can cause serious injury or even death. This removal of oxygen gas in the air we breathe makes having an oxygen depletion sensor not just useful, but essential to maintaining life.

How is Nitrogen used to control oxygen levels?

Nitrogen (N2) can be used to control levels of oxygen in a laboratory. When carrying out tasks within the pharmaceutical industry, when transferring products or packaging process, nitrogen is used. Nitrogen is used to take oxygen away from the packaging prior to it being sealed, to make certain the product is preserved. As a result of this the need for an oxygen deficiency monitor is very important. Fixed or portable devices have the ability to detect oxygen levels within a laboratory, plant or utility room. Fixed gas detection systems are suitable for monitoring an area or room, whereas a portable gas detector is designed to be worn on the person within your breathing area.

What are the Risks of Oxygen depletion?

There are three main reasons why monitors are needed; it is essential to detect oxygen deficiencies or enrichment as too little oxygen can prevent the human body from functioning leading to the worker losing consciousness. Unless the oxygen level can be restored to a normal level the worker is at risk of potential death. An atmosphere is deficient when the concentration of O2 is less than 19.5%. Consequently, an environment that has too much oxygen in it is equally dangerous as this constitutes a greatly increased risk of fire and explosion, this is considered when the concentration level of O2 is over 23.5%.

In the absence of adequate ventilation, the level of oxygen can be reduced surprisingly quickly by breathing and combustion processes. Oxygen levels may also be depleted due to dilution by other gases such as carbon dioxide (also a toxic gas), nitrogen or helium, and chemical absorption by corrosion processes and similar reactions. Oxygen sensors should be used in environments where any of these potential risks exist. When locating oxygen sensors, consideration needs to be given to the density of the diluting gas and the “breathing” zone (nose level). For example, helium is lighter than air and will displace the oxygen from the ceiling downwards whereas carbon dioxide, being heavier than air, will predominately displace the oxygen below the breathing zone. Ventilation patterns must also be considered when locating sensors.

Oxygen monitors usually provide a first-level alarm when the oxygen concentration has dropped to 19% volume. Most people will begin to behave abnormally when the level reaches 17%, and hence a second alarm is usually set at this threshold. Exposure to atmospheres containing between 10% and 13% oxygen can bring about unconsciousness very rapidly; death comes very quickly if the oxygen level drops below 6% volume. Oxygen sensors are often installed in laboratories where inert gases (e.g., nitrogen) are stored in enclosed areas.

How do Fixed or Portable Devices Detect Oxygen?

Crowcon offer a range of portable monitors; Gas-Pro portable multi gas detector offers detection of up to 5 gases in a compact and rugged solution. It has an easy-to-read top mount display making it easy to use and optimal for confined space gas detection. An optional internal pump, activated with the flow plate, takes the pain out of pre-entry testing and allows Gas-Pro to be worn either in pumped or diffusion modes.

T4 portable 4-in-1 gas detector provides effective protection against oxygen depletion. T4 multi gas detector now comes with improved detection of pentane, hexane and other long chain hydrocarbons. Offering you compliance, robustness and low cost of ownership in a simple to use solution. T4 contains a wide range of powerful features to make everyday use easier and safer.

Crowcon’s fixed detector XgardIQ is an intelligent and versatile fixed detector and transmitter compatible with Crowcon’s full range of sensor technologies. Available fitted with a variety of sensors for fixed flammable, toxic, oxygen or H2S gas detection. Providing analogue 4-20mA and RS-485 Modbus signals as standard, XgardIQ is optionally available with Alarm and Fault relays and HART communications. The 316 stainless steels are available with three M20 or 1/2“NPT cable entries. This device is also (SIL-2) Safety integrity level 2 certified fixed detector.

Keeping the Emergency Services Safe

Emergency Service Personnel encounter gas related risks as part of their jobs. However, immediate evaluation of their surrounds is key upon arrival as well as continuous monitoring whilst in a rescue situation are vital for the health of all those involved.  

What Gases are Present?

Toxic gases like carbon monoxide (CO) and hydrogen cyanide (HCN) are present if there is a fire. Individually these gases are dangerous and even deadly, the two combined is exponentially worse, known as the toxic twins.  

Carbon monoxide (CO) is a colourless, odourless, tasteless, poisonous gas produced by incomplete burning of carbon-based fuels, including gas, oil, wood, and coal. It is only when fuel does not burn fully that excess CO is produced, which is poisonous. When the excess CO enters the body, it stops the blood from bringing oxygen to cells, tissues, and organs. CO is poisonous as you cannot see it, taste it or smell it but CO can kill quickly without warning.  

Hydrogen Cyanide (HCN) is an important industrial chemical and over a million tonnes are produced globally each year. Hydrogen Cyanide (HCN) is a colourless or light blue liquid or gas that is extremely flammable. It has a faint bitter almond odour, although this isn’t detectable to everyone.  There are many uses for hydrogen cyanide, primarily in the manufacture of paints, plastics, synthetic fibres (for example nylon) and other chemicals. Hydrogen cyanide and other cyanide compounds have also been used as a fumigant to control pests. With other uses being in metal cleaning, gardening, ore-extraction, electroplating, dying, printing and photography. Sodium and potassium cyanide and other cyanide salts may be made from hydrogen cyanide. 

What are the risks?

These gases are dangerous individually. However, exposure to both combined is even more dangerous, so an adequate CO and HCN gas detector is essential where the toxic twins are found. Usually, visible smoke is a good guide, however the Toxic Twins are both colourless.  Combined these gases are usually found in fires. in which, Firefighters and other Emergency Personnel are trained to look out for CO poisoning in fires. However, due to the increased use of plastics and man-made fibres, HCN can be released at up to 200ppm in domestic and industrial fires. These two gases cause thousands of fire related deaths annually, so needs more consideration in fire gas detection.  

The attendance of HCN in the environment may not always lead to exposure. However, for HCN to cause any adverse health effects, you need to come into contact with it, i.e., breathing, eating, drinking, or through skin or eye contact with it. Following exposure to any chemical, the adverse health effects are dependent on a number of factors, such as the amount to which you are exposed (dose), the way you are exposed, the duration of exposure, the form of the chemical and if you were exposed to any other chemicals. As HCN is very toxic, it can prevent the body from using oxygen properly. Early signs of exposure to HCN include headache, sickness, dizziness, confusion and even drowsiness. Substantial exposure may rapidly lead to unconsciousness, fitting, coma and possibly death. If a substantial exposure is survived, there may be long-term effects from damage to the brain and other nervous system damage. Effects from skin contact require a large surface of the skin in order to be exposed. 

What Products are Available?

For Emergency Service Teams, the use of portable gas detectors is essential. Toxic gases are produced when materials are burnt meaning flammable gases and vapours may be present.  

Our Gas-Pro portable multi gas detector offers detection of up to 5 gases in a compact and rugged solution. It has an easy-to-read top mount display making it easy to use and optimal for confined space gas detection. An optional internal pump, activated with the flow plate, takes the pain out of pre-entry testing and allows Gas-Pro to be worn either in pumped or diffusion modes. In-field pellistor changes for methane, hydrogen, propane, ethane, acetylene (0–100% LEL, with resolution of 1% LEL). By allowing in-field pellistor changes, Gas-Pro detectors give users the flexibility to conveniently test for a range of flammable gases, without needing multiple sensors or detectors. What is more, they can continue to calibrate using existing methane canisters, saving time and money. The gas sensor for hydrogen cyanide has a monitoring measuring range of 0–30 ppm with resolution of 0.1 ppm.  

Tetra 3 portable multi gas monitor can detect and monitor the four most common gases (carbon monoxide, methane, oxygen and hydrogen sulphide), but also an expanded range: ammonia, ozone, sulphur dioxide, H2 filtered CO (for steel plants) and IR carbon dioxide (for safe area use only). 

T4 portable 4-in-1 gas detector provides effective protection against 4 common gas hazards: carbon monoxide, hydrogen sulphide, flammable gases and oxygen depletion. The T4 multi gas detector now comes with improved detection of pentane, hexane and other long chain hydrocarbons. 

Clip Single Gas Detector (SDG) is an industrial gas detector designed for use in hazardous areas and offers reliable and durable fixed life span monitoring in a compact, lightweight and maintenance-free package. Clip SGD has a 2-year life and is available for hydrogen sulphide (H2S), carbon monoxide (CO) or oxygen (O2). 

Gasman is a full function device in a compact and lightweight package – perfect for customers who need more sensor options, TWA and data capability. It comes available with long-life O2 sensor, MPS sensor technology.

MPS Sensor provides advanced technology that removes the need to calibrate and provides a ‘True LEL’ for reading for fifteen flammable gases but can detect all flammable gases in a multi-species environment. Many industries and applications use or have as a by product multiple gases within the same environment. This can be challenging for traditional sensor technology which can detect only a single gas that they were calibrated for and can result in inaccurate reading and even false alarms which can halt process or production. The challenges faced in multi gas species environments can be frustrating and counterproductive. Our MPS™ sensor can accurately detect multiple gases at once and instantly identify gas type. Our MPS™ sensor has a on board environmental compensation and does not require a correctional factor. Inaccurate readings and false alarms are a thing of the past.

Crowcon Connect is a gas safety and compliance insight solution that utilises a flexible cloud data service offering actionable insight from detector fleet. This cloud-based software provides a top level view of device utilisation with dashboard showing proportion of devices that are Assigned or Unassigned to an operator, for the specific region or area selected. Fleet Insights provides overview of devices switch on/off, synced or in alarm.

Why HVAC professionals are at risk from Carbon Monoxide – and how to manage it

Carbon Monoxide (CO) is an odourless, colourless and tasteless gas that is also highly toxic and potentially flammable (at higher levels: 10.9% Volume or 109,000ppm). It is produced by the incomplete combustion of fossil fuels such as wood, oil, coal, paraffin, LPG, petrol and natural gas. Many HVAC systems and units burn fossil fuels, so it’s not hard to see why HVAC professionals may be exposed to CO in their work. Perhaps you have, in the past, felt dizzy or nauseous, or had a headache during or after a job? In this blog post, we’ll look at CO and its effects, and consider how the risks can be managed.

How is CO generated?

As we have seen, CO is produced by incomplete combustion of fossil fuels. This generally happens where there is a general lack of maintenance, insufficient air – or the air is of insufficient quality – to allow complete combustion.

For example, the efficient combustion of natural gas generates carbon dioxide and water vapour. But if there is inadequate air where that combustion takes place, or if the air used for combustion becomes vitiated, combustion fails and produces soot and CO. If there is water vapour in the atmosphere, this can reduce the oxygen level still further and speed up CO production.

What are the dangers of CO?

Normally, the human body uses haemoglobin to transport oxygen via the bloodstream. However, it is easier for the haemoglobin to absorb and circulate CO than oxygen. Consequently, when there is CO around, danger arises because the body’s haemoglobin ‘prefers’ CO over oxygen. When the haemoglobin absorbs CO in this way, it becomes saturated with CO, which is promptly and efficiently transported to all parts of the body in the form of carboxyhaemoglobin.

This can cause a range of physical problems, depending on how much CO is in the air. For example:

200 parts per million (ppm) can cause headache in 2–3 hours.
400 ppm can cause headache and nausea in 1–2 hours, life threatening within 3 hours.
800 ppm can cause seizures, severe headaches and vomiting in under an hour, unconsciousness within 2 hours.
1,500 ppm can cause dizziness, nausea, and unconsciousness in under 20 minutes; death within 1 hour.
6,400 ppm can cause unconsciousness after two to three breaths; death within 15 minutes.

Why are HVAC workers at risk?

Some of the most common events in HVAC settings may lead to CO exposure, for example:

Working in confined spaces, such as basements or lofts.
Working on heating appliances that are malfunctioning, in a poor state of repair, and/or have broken or worn seals; blocked, cracked or collapsed flues and chimneys; allowing products of combustion to enter the working area.
Working on open-flued appliances, especially if the flue is spilling, ventilation is poor and/or the chimney is blocked.
Working on flue-less gas fires and/or cookers, especially where the room volume is of inadequate size and/or the ventilation is otherwise poor.

How much is too much?

The Health and Safety Executive (HSE) publishes a list of workplace exposure limits for many toxic substances, including CO. You can download the latest version free of charge from their website at www.hse.gov.uk/pubns/books/eh40.htm but at time of writing (November 2021) the limits for CO are:

Workplace Exposure Limit

Gas Formula CAS Number Long Term Exposure Limit
(8-hr TWA Reference Period)
Short Term Exposure Limit
(15-min Reference period)
Carbon monoxide CO 630-08-0 20ppm (parts per million) 100ppm (parts per million)

How can I stay safe and prove compliance?

The best way to protect yourself from the hazards of CO is be wearing a high quality, portable CO gas detector. Crowcon’s Clip for CO is a lightweight 93g personal gas detector that sounds at 90db alarm whenever the wearing is being exposed to 30 and 100 ppm CO. The Clip CO is a disposable portable gas detector that has a 2-year lifespan or a maximum of 2900 alarm minutes; whichever is sooner.

What are Area Monitors and how do I use one?

Outdoor leaks from storage tanks or pipelines are a particular kind of hazard. With many outdoor areas not housing permanent, fixed detectors. If you’re relying solely on a personal monitor, by the time it alarms, there is a possibility that you may be engulfed in a hazardous gas cloud. Therefore, a temporary early warning system between you and the potential source of a gas hazard has the ability to alert you to trouble coming your way.

What are Area monitors and where would they be used? 

Temporary Area monitors are usually rugged units that can be placed, stand-alone to monitor a small area or multiple units can be linked together via wired or wireless networking to create a perimeter defence of a larger area. Area Monitor devices help safety personnel protect their workers from gas hazards in situations, in addition to—or sometimes in substitution of—personal, portable gas monitors used as Personal Protective Equipment (PPE). Area monitors can be positioned to produce a guard between potential hazards and workers, to notify what they are heading into or what potential hazards are coming their way.  This occurs most often when work takes place outside of normal operations where the risks are higher and/or different such as special projects, construction, maintenance, shutdowns, temporary sites or rigs, etc. In this way, they can be used to form a barrier around a tank or along a portion of pipeline close to the location of work being carried out. Portable units can be easily deployed to provide fence line monitoring during maintenance, shutdowns or turnaround. The objective is to ensure that the devices are not so far apart that gas could pass between them undetected.  If a fixed system is being taken offline for maintenance a network of fast to deploy temporary area monitors is an ideal option to use in place of the fixed system until maintenance is complete and the system is brought back online. 

How do you use one? 

Units can be connected by cables. However wireless connection between individual area monitors is also available and avoids introducing a potential trip hazard. This could add significantly to an already risky task, for example, if working at height. Some wireless systems create a “self-healing” mesh network. In this case, should the wireless connection between two devices weaken, the network will automatically re-route communications via alternate enabled devices, creating a mesh type network allowing a more robust and efficient wireless network. 

The benefit from a wireless connection is that it is practical to use repeaters or extra units to relay alerts directly to the control room. Besides the gas alert signals, some detectors will transmit other faults i.e., the loss of signal, or “battery low” alarm. This programmed alert mode is often conveyed by a specific sequence of signals, such as the beacon and lights will flash for 3 seconds followed by 5 second pause which will be repeated until an operator acknowledges the alarm. 

Wireless temporary area monitoring allows for quick deployment whilst ensuring a high level of protection for workers in circumstances where the risks are tricky to monitor. Personnel working at height can be alerted to any gas hazards on the ground, or vice versa and the same alarm can be relayed to the control room by having an additional detector in the control room. The audible alarm is significantly louder than a standard portable and light sequence is brighter and flashes faster on the Detective+ unit when gas is detected. , whilst the sequence on other units in the network is slower. This differentiates the unit nearest the gas from the rest, so everyone is alerted to the location of the hazard. In contrary, to the benefits of this products, the configuration tends to be straightforward without additional hardware. The batteries in Detective+ are larger and last longer than conventional portables. All in all, these units offer a simple yet effective solution for protecting workers outside of normal operations. 

Crowcon’s Detective+ is ideal for temporary area monitoring while workers carry out a repair. Detective+ is portable and can be easily deployed to provide fence line monitoring during shutdowns or turnaround. If working on a cooling tower fin fan, Detective+ units are connected to other units (up to 70m away) via Detective Wireless modules, which eliminate the need for cabling between units. Detective Wireless uses the proven RICOCHET mesh network. In the unusual circumstance that the wireless connection between two devices weaken, the network will automatically re-route communications via alternate RICOCHET enabled devices and so ‘self-heal’. In essence, this creates a mesh type network allowing a more robust and efficient wireless network.

Read more about Area Monitoring  

Once again, Gas-Pro is ‘detector of choice’ for volcano environmental expedition

We are all familiar with the term global warming and often see statistics about the potential effects this could have on our planet.  One such prediction is by the end of this century the globe will increase in temperature by between 0.8 and 4 degrees.

What many of us may not know is that volcanoes, which are a completely natural phenomenon, contribute a significant amount of gases into our atmosphere. And these gases are currently not considered in the world’s climate models, which means there is potentially a large margin of error.

However, this could be about to change as Yves Moussallam, an inspiring French Volcanologist, who with the support of Rolex and the 2019 Rolex Awards for Enterprise, has made it his mission to understand volcanos and how they impact on our planet.  He ventures into these dramatic and dangerous environments to take measurements which are used by scientists and climatologists to improve their prediction models.

By observing volcanos, and gathering this vitally important data, he is helping the world understand the impact volcanos are having on climate change.

Yves is no stranger to volcanic expeditions. In 2015, he led a small team to the Nazca subduction zone in South America. Their mission was to provide the first accurate and large-scale estimate of the flux of several volatile gas species.

To keep the team safe, Yves selected Crowcon detection equipment and was delighted with Gas man and Gas-Pro’s lightweight, clean and safe functionality.

Now Yves is back with a new expedition and has turned to Crowcon once again. This time, Yves is heading to the region of Melanesia in Italy.  Satellites, which are used to track volcanic behaviour, have shown that this region is responsible for approximately a third of global volcanic gas emissions.

His expedition will climb these volcanoes and take measurements directly in the volcanic plume.

There are two main methods to measure gases in volcanoes.  The first is via satellite which takes images from space.  The second is to go directly into the field and measure gas released at its source.

Experts believe the method of working directly in the field is the most accurate as it is positioned far closer to the source so there is a reduced risk of error.

To conduct these measurements requires tried, tested and trusted equipment and with Crowcon’s proven track record, Yves turned again to Gas-Pro.

Crowcon’s Gas-Pro includes an onboard datalogging feature which will provide an extra line of data and an idea of average exposure, which is important for expeditions that span longer periods.  It is also lightweight which is hugely beneficial when carrying bulky equipment.

Everyone at Crowcon wishes Yves a safe and successful expedition and we hope the data he gathers will help us understand the impact volcanos have on our world.

#Rolex #RolexAwards #PerpetualPlanet #Perpetual

Explosion hazards in inerted tanks and how to avoid them

Hydrogen sulphide (H2S) is known for being extremely toxic, as well as highly corrosive. In an inerted tank environment, it poses an additional and serious hazard combustion which, it is suspected, has been the cause of serious explosions in the past.

Hydrogen sulphide can be present in %vol levels in “sour” oil or gas. Fuel can also be turned ‘sour’ by the action of sulphate-reducing bacteria found in sea water, often present in cargo holds of tankers. It is therefore important to continue to monitor the level of H2S, as it can change, particularly at sea. This H2S can increase the likelihood of a fire if the situation is not properly managed.

Tanks are generally lined with iron (sometimes zinc-coated). Iron rusts, creating iron oxide (FeO). In an inerted headspace of a tank, iron oxide can react with H2S to form iron sulphide (FeS). Iron sulphide is a pyrophore; which means that it can spontaneously ignite in the presence of oxygen

Excluding the elements of fire

A tank full of oil or gas is an obvious fire hazard under the right circumstances. The three elements of fire are fuel, oxygen and an ignition source. Without these three things, a fire can’t start. Air is around 21% oxygen. Therefore, a common means to control the risk of a fire in a tank is to remove as much air as possible by flushing the air out of the tank with an inert gas, such as nitrogen or carbon dioxide. During tank unloading, care is taken that fuel is replaced with inert gas rather than air. This removes the oxygen and prevents fire starting.

By definition, there is not enough oxygen in an inerted environment for a fire to start. But at some point, air will have to be let into the tank – for maintenance staff to safety enter, for example. There is now the chance for the three elements of fire coming together. How is it to be controlled?

  • Oxygen has to be allowed in
  • There may be present FeS, which the oxygen will cause to spark
  • The element that can be controlled is fuel.

If all the fuel has been removed and the combination of air and FeS causes a spark, it can’t do any harm.

Monitoring the elements

From the above, it is obvious how important it is to keep track of all the elements that could cause a fire in these fuel tanks. Oxygen and fuel can be directly monitored using an appropriate gas detector, like Gas-Pro TK. Designed for these specialist environments, Gas-Pro TK automatically copes with measuring a tank full of gas (measured in %vol) and a tank nearly empty of gas (measured in %LEL). Gas-Pro TK can tell you when oxygen levels are low enough to be safe to load fuel or high enough for staff to safely enter the tank. Another important use for Gas-Pro TK is to monitor for H2S, to allow you judge the likely presence of the pryophore, iron sulphide.

Servicing for safety… A visit to the oil refinery

Working in the office makes it easy to focus on the individual tasks and get detached from how our products are making a difference to people’s lives. One of our customers was kind enough to facilitate an onsite visit so that Andrea (our Halma Future Leader on a marketing placement) could see first-hand how our products are used and who the end users are. This meant a visit to an oil refinery to see where our Crowcon portable gas detectors are used.


“The main thing that surprised me was the sheer size of the site. The oil refinery was very spaced out and it took us 10 minutes to walk from the entrance of the site to where the Crowcon engineer’s based. The engineers and employees around different parts of the refinery wore Hi Vis jackets, big safety boots, hard hats and all appeared to have personal gas detectors. During a quick site tour, I learned the products of the oil refinery are not limited to gas or petrol, but also tar, asphalt, lubricants, washing up liquid, paraffin wax and much more.

The products are all stored in big containers with pipes all over the site. Most of the products are highly flammable which explains the big focus on safety. In the distance, there were a few dome shaped containers which are pressurised vessels. If one of them were to explode, it would have a 10 mile blast radius. Suddenly I had the urge to leave and drive about 10 miles.

Crowcon’s engineer base was full of orange T4s, Gas-Pros as well as an army of “Daleks”, I mean Detectives, awaiting calibration and service. While the harshness of this industrial environment was evident from their appearance, they were otherwise in good working order, and the service engineer worked through the devices quickly.

The end users think of them as a simple device they have to wear to do their job, and they like the simplicity and reliability of Crowcon devices. The Detectives get thrown around and Gas-Pros are almost black is comparison to the usual orange, which just showcases how important the robustness of our devices is. The dangers of this working environment are not generally a big concern to the users, this is everyday life to them. Our devices help ensure they go home after a tough shift. Ensuring the devices are functioning properly is down to the service engineers, and they need to think for the users to ensure that the devices are being used properly.

Seeing Crowcon’s devices being used and the number of times someone enquired if the devices are calibrated and ready to go back into action, highlighted just how important use of portables as part of the safety regime  is considered. “Quality” and “robust” is how users describe Crowcon products and even though they may now treat them like the life saving devices they are, the devices are regularly used and valued. They make a very flammable and dangerous environment a safer place to be.”

The don’ts and don’ts of zeroing your CO2 detector

Unlike other toxic gases, carbon dioxide (CO2) is all around us, albeit at levels too low to cause health issues under normal circumstances. It raises the question, how do you zero a CO2 gas detector in an atmosphere where CO2 is present?

Continue reading “The don’ts and don’ts of zeroing your CO2 detector”

Successful aspirations

Good confined space entry procedure requires the use of a pumped portable detector to check the space is safety to enter. But some detectors don’t have pumps built in, in which case, an aspirator should be used. An aspirator is a manual system for drawing the air through a tube to the sensor, and it can work well. However, it is something that requires practice to give confidence that you are doing it right.

Continue reading “Successful aspirations”