Protecting a pressurized gas pipeline system from leaks and corrosion and minimizing downtime are among the most important responsibilities that oil and gas companies have. According to the National Association of Corrosion Engineers (NACE) International, corrosion alone costs the industry over $1.3 billion a year.
If oxygen (O2) is present in a sample gas, it means that there is a leak in the pressurized pipeline system. And if this leak remains undetected, the problem can worsen and continue to impact the operational flow efficiency of the pipeline. Additionally, if the gas sample inside the pipeline contains hydrogen sulfide (H2S) and carbon dioxide (CO2), all 3 gases can combine and form a very corrosive and destructive mixture that can deteriorate the wall thickness from the inside out. Unless treated, this corrosion will continue to spread, create more damage and shorten the pipeline’s life. Eventually, the damage reaches a point where there is significant risk of a rupture or potential explosion.
Companies operating in the Oil & Gas Industry must contend with enormous costs caused by repairs and downtime. And this steep cost is what serves as the driving force behind preventative action. Monitoring for leaks is one of the most effective approaches in extending the life of a pressurized pipeline system. Using a highly accurate and reliable PPM oxygen analyzer will tell you if trace amounts of oxygen from the outside environment has entered the gas pipeline system, indicating the presence of a leak. Companies can also take a proactive step in corrosion prevention by measuring for trace amounts of hydrogen sulfide in their sample gas.
Advanced Micro Instruments offers the industry’s leading solutions for trace gas measurements because our trace analyzers contain the most innovative technologies for unmatched performance, accuracy and reliability. Our high-performance analyzers are compact and extremely rugged. They are available in both permanent mount and portable configurations, and we have several models with CSA approvals meeting: Class 1, Div. 1 Groups B,C,D requirements in a flammable gas stream. Using our trace analyzers in your application will help prevent the formation of the corrosive mixture, extend the life of your infrastructure and significantly increase the level of safety for everyone.
Hazardous area permanent mount trace oxygen analyzer
Hazardous area portable trace oxygen analyzer
Hazardous area permanent mount percent oxygen analyzer
Hazardous area permanent mount hydrogen sulfide analyzer
Hazardous area portable hydrogen sulfide analyzer
General purpose permanent mount trace oxygen analyzer
General purpose permanent mount trace oxygen analyzer. Atmospheric pressure sample source
General purpose permanent mount percent oxygen analyzer
General purpose permanent mount percent oxygen analyzer. Atmospheric pressure sample source
Multichannel general purpose permanent mount trace oxygen analyzer
Multichannel general purpose permanent mount trace oxygen analyzer for atmospheric pressure samples
Multichannel general purpose permanent mount percent oxygen analyzer
Multichannel general purpose permanent mount percent oxygen analyzer for atmospheric pressure samples
Low cost Division 2 area permanent mount trace oxygen analyzer
General purpose rack mount trace oxygen analyzer
General purpose rack mount percent oxygen analyzer
Conventionally we refer to the fuel-cell type galvanic sensor as “Electrochemical”. It is built using a liquid electrolyte, a noble metal cathode and a lead (typically) anode, and uses a Teflon™ membrane to control the oxygen flow into the active area. Such sensors are comparatively inexpensive, reliable and have been used for many years. They are the only practical way of measuring ppm levels of oxygen, and are also appropriate in many cases for measuring percent levels particularly when measuring in a flammable gas background.
Electrochemical sensors are a disposable part like a flashlight battery. In typical use they last about a year, and require regular calibration. They respond to the partial pressure of oxygen. They are specific to oxygen, and are not affected by the presence of flammable gases. Trace sensors have a zero output in the absence of oxygen, which means that they do not need to have a zero calibration – an almost impossible task in practice. They require no power and are comparatively low in cost. They require temperature compensation which is built into the analyzers that use them but they may respond to a sudden and rapid temperature change. They will also respond to barometric pressure changes in direct proportion to the absolute pressure. These latter characteristics are normally only significant in oxygen deficiency monitoring applications.
Electrochemical sensors should be used in general percentage measurements, in hazardous atmospheres, and with flammable background gases or to measure trace levels of oxygen. For percent measurements in inert background gases such as air, the zirconium oxide sensor is the better choice if power is available.
This kind of sensor uses a ceramic material at high temperature to measure oxygen. This general kind of sensor is commonly used in automobiles to control the air-fuel ratio, but the particular design used for gas analysis is quite different. It has a number of advantages in that it is extremely stable, very long-lived, and immune to barometric and temperature changes. On the other hand zirconium oxide sensors will oxidize anything flammable in the sample stream, burning up any oxygen present while they do so, so that they cannot be used in any gas stream with flammable components, or effectively with ppm levels of oxygen because any slightest trace of anything flammable (such as hydrocarbon gases, carbon monoxide or even oils from your fingers) will eat up trace oxygen giving a falsely low reading.
Zirconium oxide sensors should be used to measure percent levels of oxygen in inert atmospheres, such as the amount of oxygen in the air in an enclosed space. In this application they will last for many years without any real need for calibration or replacement. They should not be used with flammable gases or for measuring ppm levels of oxygen.