Incredible advances in micro-miniaturization of electronic components, integrated circuits and microprocessors have benefited our world and will continue to produce new solutions and conveniences. These advances have resulted in extraordinary innovations, such as very powerful, compact computers, cell phones and various telecommunications devices. And these devices, though inconceivable just a few decades ago, are now common place worldwide.
The production of electronics requires the use of high purity gases. High purity oxygen, nitrogen and argon play an important part in semiconductor fabrication and are sourced from air separation companies. Impurities even at the smallest amounts of ppb oxygen, ppm oxygen, moisture and hydrocarbons, cannot be tolerated in the manufacturing process. And though air separation companies utilize cryogenic distillation to produce their ultra-high purity gases, it is still pragmatic for electronics and electronic parts manufacturers to check and verify the purity of the gas tanks that they receive prior to releasing them into production.
AMI offers a complete line of innovative, high-performance oxygen analyzers to help you protect your manufacturing and fabrication processes from impurities. We have specific models for trace oxygen measurements and % oxygen analysis, and they contain our patented Eliminator Cell Block™ to ensure the highest levels of measurement accuracy and reliability. Our analyzers, when used together with our oxygen sensors (built with Bullet Sensor Technology™) can measure to oxygen levels as low as 0.05ppm or as high as 100% in a gas stream. Additionally, our state-of-the-art Command Center Electronics Platform™ comes as a standard option and provides users with a multitude of advancements, including but not limited to:
You will find that our trace and % oxygen measurement solutions set the bar for the industry and will help safeguard your manufacturing and fabrication processes.
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
Area safety - permanent mount oxygen deficiency monitor
Area safety – wall mount oxygen deficiency monitor
General purpose percent oxygen probe
Ultra-stable Percent oxygen probe
General purpose rack mount percent oxygen analyzer
Portable Ultra-stable Percent oxygen analyzer
Portable Ultra-stable Percent oxygen analyzer for ambient pressure samples
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.