How to increase the detectors’ lifetime and ensure the best accuracy of the process chromatographs?

How to increase the detectors' lifetime and ensure the best accuracy of the process chromatographs?

Before explaining to you how to increase your detector's lifetime, I would like to share with you this history to understand one of our Analyzers Experts purposes:

There once was a farmer who grew award-winning corn. Each year he entered his corn in the state fair where it won a blue ribbon. One year a newspaper reporter interviewed him and learned something interesting about how he grew it. The reporter discovered that the farmer shared his seed corn with his neighbors.

How can you afford to share your best seed corn with your neighbors when they are entering corn in competition with yours each year? the reporter asked.

 

"Why sir," said the farmer, "didn't you know? The wind picks up pollen from the ripening corn and swirls it from field to field. If my neighbors grow inferior corn, cross-pollination will steadily degrade the quality of my corn. If I am to grow good corn, I must help my neighbors grow good corn."

 

 

He is very much aware of the connectedness of life. Our professional life can't improve unless our friend's and companies also improve. So it is very simple to understand. Old minds, like companies that get talented people but try to block his development, thinking like the slavery's time where that talent never had the courage to leave his post and forget that this professional will find new opportunities also. So where this company will find another one to replace him? We must create conditions for personal development even it is to go away, but always we'll have the chance to get another talented professional wishing to work there.

We're Analyzers' Experts Community! Our purposes are to build a worldwide network for process analyzers professionals that we can share and exchange knowledge easily, get references and solve problems faster, receiving recommendations from experts and consultants, to teach beginners and offer training references, e-books, how-to fix process analyzers, and many kinds of online support. Let's build the first one and best analyzers professionals' network, exchanging, collating and disseminating information, success cases, through publications, meetings, and conferences, showing in the appropriate use of process analyzers through free tools, sharing e-books, social networking like YouTube, LinkedIn and Instagram, posts and demonstrations, publications, and courses, developing contacts with manufacturers and experts outside the forum and in other countries who have relevant experience or knowledge;

Life is short and the older you get, the more you feel it. Indeed, the shorter it is. People lose their capacity to walk, run, travel, think, and experience life. I realize how important it is to use the time I have. Viggo Mortensen

The day of change is today, we are free to innovate and make better and simpler forms of learning and exchange of knowledge so that the experience of each one is easily accessible to the entire community and people interested in using analytical instrumentation for control and process optimization. We can't waste time!

That's why I shared last week my first e-book about the top 10 most common mistakes in process chromatographs for all community, on page 11 and 12, I discussed a little about this subject that we will deal with in more detail here. To get your free copy, just click here!

So here we go!

HOW to increase the detectors' lifetime and ensure the best accuracy of the process chromatographs?

Tips and cautions

Let's talk here about some tips and cautions, simple attitudes that can make a big difference in the life of the thermal conductivity detectors of process chromatographs, ensuring accuracy and repeatability for much longer and obviously increasing the replacement interval decreasing maintenance cost and higher availability of the analyzer.

Basically, the Thermal Conductivity Detector (TCD) is a metallic filament (resistance) which is heated through a small electric current (regular) and coated with a very thin layer of glass to prevent its rapid corrosion due to contact with the carrier gas (Hydrogen, Argon, Nitrogen, etc.). This circuit basically consist a Wheatstone bridge that connected to a preamplifier unit, will oscillate according to the composition of the sample, where the temperature of the filament is changed (loses heat) and consecutively, the resistance oscillates causing a change in the balance of the Wheatstone bridge ratio, proportional to the concentration of the molecules that are hitting with the detector.

Types of detectors

The thermal conductivity of the gas is related to the size of the molecule, the smaller the gas molecule, the higher its velocity and the higher the thermal conductivity. Hydrogen gas is the molecule that has the highest thermal conductivity and is widely used as carrier gas in process chromatographs, as it is easy to manufacture and relatively low cost.

It is important to look out that in the market we have several types of detectors, and many are not aware of the detector with a double coating (thin layer of glass) to increase its useful life, especially when we use hydrogen as the carrier gas. Check the difference, look the glass layer in some detectors at the left picture.

How to Increase the Life of Your Detectors:

Small actions are required so that you get greater durability of the detectors. The main problem is the contamination of the carrier gas line or problems in the sample conditioning to be injected. Below is a short checklist containing the key actions to manage to significantly increase the life of detectors:

1) Avoid contamination of the detector during the carrier gas (cylinder) replacement:

Carrier gas replacement (routine for cylinders) is the time when the team needs to be more observant and careful. While depressurizing of the pressure regulator valve and tubbings, contamination with atmospheric air occurs and it must be purged out to the atmosphere, Do not allow this air to travel to the detectors and columns. The presence of moisture and oxygen in the detector causes a notable loss of sensitivity and a reduction in the life of the detector, occurring oxidation in the filaments and drastically reduces the sensitivity, also causing deviations in the baseline.

2) Install an automatic change-over carrier gas switching system

When we have several people responsible for the routine and maintenance of process chromatographs, some additional care must be taken to avoid negligence and possible contamination of the detectors with humidity during the replacements of the drag gas cylinders.

I recommend installing a change-over system which is responsible for automatic switching when the main cylinder loses its pressure, which immediately aligns the backup (spare) cylinder avoiding contamination with atmospheric air and also increases the availability of analyzer for the process, because at any time the system will transit without the intervention of the maintenance team!

Basically, this automatic maneuver allows the replacement of empty cylinders without interruption in the operation of the analyzer. Attention should be paid to the cylinder replacement procedure (removal of the empty cylinder) since during the installation of a new (full) cylinder the technician must purge the atmospheric contamination (oxygen, dust, moisture, etc.) before performing the final alignment.

Be very careful: even though it is an extremely useful and practical system, it is necessary to purge the cylinder during the changeover (connection at the regulator inlet), never forget it! Otherwise it may cause a possible process disturbance after switching due to the presence of moisture, and this would be a "shot" in the foot, because it would generate an emergency call at any time, for example, in the middle of the night ...

This device is supplied by several manufacturers, that is, item of easy purchase and installation.

3) Installation of a filter system (drier) in the carrier gas circuit.

Another widely used practice is the installation of silica pipes, dryers installed in series in the carrier gas circuit. These prevent moisture from flowing through the detector, so special care must be taken to avoid major disturbances.

When it gets saturated, a huge amount of moisture is trapped internally, and this can cause much more damage, as a volume of liquid will be drawn which can damage the detector at once, imagine on the separation columns and possible sample loop obstruction.

We must periodically replace the dryers according to their saturation, depending on the size of the dryer, it is estimated a few years of operation, but it is necessary to check the flow through it and estimate an average time for replacement, anticipate replacement and avoid troubles. Generally, this system remains efficient for several years, control is needed to avoid generating problems in teams with high turnover.

4) Carrier Gas - High Quality Needed

Knowing that "paper does not refuse ink", we must always make sure that the contaminants reported by the carrier gas manufacturer are actually within the parameters and concentrations required.

The presence of contaminants in pure gas cylinders is not impossible as we know that the decontamination process of the empty cylinders must be very well performed to ensure the purity of the gas.

If you have any suspicions or if the detectors has poor durability, be wary of the carrier gas that is supplied. A good test to be performed to observe the purity of the gas is to use the gas with flame ionization detectors, these are very sensitive and brutally oscillate the baseline, so you will easily notice that the contaminant content is above the reported.

5) Pressure regulator valve replacement

Never reuse a pressure regulator valve for the carrier gas circuit. Always use a new one, fully decontaminated, dust and moisture-free valve. Very careful at the time of installation to avoid the entry of contaminants and particulates such as dust or filings from the connections and tubbings.

Share your knowledge with us!

Briefly, this is what I prepared today to share with you, to talk a little about my experience and to make something available to colleagues who are entering this area of analytics that is multidisciplinary and engaging. I enjoy teaching, and I am immensely grateful to colleagues who dedicate and spend a little of precious time helping others.

I would love to learn from you too and if possible receive information content to disseminate in our Analytical Instrumentation community, share best practices and success stories in a collaborative way of learning, connecting experts with the general public by promoting knowledge and generating opportunity for all.

Final considerations

The lack of information and interest to improve analyzer's routines, in general, is primarily responsible for the "labeling" and "trivialization" that the analytical instrumentation discipline currently receives. Very accurate equipment and technology are underestimated and lose credibility due to the small details and actions that the maintenance team could easily solve.

For this same lack of knowledge on the part of some teams, more and more online analyzers are being replaced by "virtual analyzers" after all, for some professionals, it's all the same ... And when they realize it does not work, it's too late ...

The interest in the discipline of analytical instrumentation, its dedication and commitment to the final result is the key to success and a total guarantee of customer satisfaction.

Discipline, focus, dedication, quality, and teamwork all the time!

As a specialist in the discipline, I am pleased to explain and demonstrate the value and usefulness that an online analyzer has and, mainly, to share knowledge contributing with the professionals who work in this area creating together a good reputation of the discipline that is good for all of us, valuing our work and contributing to the quality assurance of the final product with cost and safety reduction. So, let's change this scenario and start sharing success cases and posting what's the difference that's process analyzers really do!

Remember that your attitude and behavior are as valuable as your professional baggage. Being supportive is something immense and sharing knowledge and experience makes us feel better and more and more human. I invite you to participate with us, the proposal is so that we can exchange knowledge with each other, help and share with people knowledge and professional experience and allow our colleagues to continue on this journey in a more productive way and to discover new solutions and generate more results.

Make every week of your life with extra learning and useful for people. The little knowledge we share can save the employment of many colleagues or even be the first step to forming a great professional for the job market.

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Publish an article as well, share your knowledge and help us to disseminate and promote value knowledge and success stories for the entire Analytical Instrumentation and Automation community, really focusing on what results in saving our precious time by investing assertively in to delivery big results for all.

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Knowledge

Process Gas Chromatographs;

Detectors lifetime ;

Concepts and best practices;

Abiliity

Know how to do the right thing;

Ensure the best accurac;

Sharing our best talent, high skill, and practice.

 

Attitude

To put into practice the knowledge acquired.

Discipline, focus, dedication, quality, and teamwork all the time!

Sharing

Encouraging the analyzers professionals around the world to share what they know with synergies, know-how, and expertise.

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The 10 Most Common Process Chromatographs Mistakes

The 10 Most Common Process Chromatographs Mistakes

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I am finalizing the edition of the first e-book to be shared with our Analyzers Experts community:

The 10 Most Common Process Chromatographs Mistakes

If you have not yet registered yet, register now. Next week you will receive a free copy in your inbox!

 

Free Learning Content

Sharing knowledge gained over several years! This first e-book has been designed to demonstrate the top 10 most mistakes in process chromatography and help mainly professionals whose main expertise is not analytical instrumentation field. We know that an analytical team is not common in every industry, sometimes leadership team doesn't realize this importance. The main purpose is to help you to prevent and fix the common mistakes, support you in solving some problems for analyzers that you are liable and help to increase reliability, and improve the reputation for our discipline.

 

WE focus on our skills

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The Analyzers Experts Community ’s purposes are to build a worldwide network for process analyzers professionals that we can share and exchange knowledge easily, get references and solve problems faster, receiving recommendations from experts and consultants, to teach beginners and offer training references. We can't waste time!

Knowledge Exchange

We'll promote the natural process which brings together all interested professionals, consulting, operators, process engineers, users of process analyzers, projects team. Our community is the wider place to exchange ideas, trends, evidence, and expertise in analyzers.

Data Analysis

The process plants increasingly are using analyzers to help improve operational efficiencies for process control systems but they need to know the best application for each case. The Analytical Instrumentation can increase the plant reliability helps easily cost reduction, increase production, better transitions recipes, and maintain stable product quality for final customers.

Knowledge

Process Gas Chromatographs;

Sample System and Representativity;

Concepts and best practices;

Abiliity

Know how to do the right thing.

Sharing our best talent, high skill, and practice.

 

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To put into practice the knowledge acquired.

Sharing

Encouraging the analyzers professionals around the world to share what they know with synergies, know-how, and expertise.

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FULL Tips To Increase your pH Skills

Our latest expert advice, best practices, and professional tips.

An experienced and passionate Product Manager with a long history of working in the Industrial Automation industry. Skilled in Process Optimization, Process Control and Chemical Engineering Strong and Creative product management professional. I'm talking about Miranda de Bruijn, European Product Manager - Yokogawa. Specialized in Analytical Instrumentation. She is from Utrecht Area, Netherlands

The effect on Total Cost of Ownership (TCO) by extending pH Sensor Lifetime

 

Top 4 Factors That Determine The Lifetime Of Your pH Sensor.

The lifetime of a pH sensor has a significant impact on the overall annual costs of a pH measuring loop. Optimizing four key factors will decrease these costs and optimize process control and overall plant efficiency.

These four key factors are :

Calibration

Although Calibration itself does not influence the life time of a pH sensor, improper calibration might result in replacement of a sensors, without it being necessary.

Maintenance

The measurement results obtained from dirty sensor can be anything from slow response, to a completely wrong reading. Therefor correct Maintenance is very important.

Engineer Skillset

A pH sensor is a highly technical, precision instrument. Sensors like these often require a specific Engineering skillsets in order to get the most out of the measurement.

Sensor Selection

The most important factor in obtaining the highest performance possible is Sensor Selection. Selecting the wrong pH sensor for your application can lower the lifetime significantly.

Download this free guide directly from Yokogawa Library

Free Guide

The lifetime of a pH sensor has a significant impact on the overall annual costs of a pH measuring loop. Optimizing four key factors will decrease these costs and optimize process control and overall plant efficiency.

Download the "pH Sensor Lifetime eBook" and learn more about:

  • How calibration, maintenance, engineering skillset, and process conditions influence the lifetime of your sensor;
  • The total cost of ownership of a pH measurement loop;
  • Typical problems that cause a shorter sensor lifetime;
  • How to extend the lifetime of your pH sensor;
  • 15+ pages of educational content.

Please note that this landing page may not work in Internet Explorer. Please open it in a different browser or send an e-mail to marketing@nl.yokogawa.com

 

Recommended practices to extend your pH sensor lifetime

Extending pH sensor lifetime

The lifetime of a pH sensors has a significant impact on the overall costs of the entire pH measuring loop. Optimizing four key factors - maintenance, operator skill-set, sensor selection, and calibration - will lower costs and optimize process control and overall plant efficiency. In this 2/5 blog we will look into calibration.

The role of calibration

There often is a misinterpretation of the meaning of calibration and maintenance.

Basically, maintenance activities will focus on "CHANGEABLE effects", for example: cleaning a dirty sensor. Calibration on the other hand will compensate UNCHANGEABLE effects.

These are:

Aging of the pH glass, usually caused by chemicals in the process or high temperatures

Poisoning or depletion of the reference chamber

Calibration itself won’t extend the life of your sensor, but a sensor that is not calibrated properly can cause unreliable measurements. In some cases, that even results in unnecessary replacements. Don't underestimate the importance of calibration!

WE WILL SHOW YOU THINGS YOU HAVE NEVER SEEN

Yokogawa has directories and websites which give access to a wealth of freely available, high quality, online resources. Take a look!

MAINTENANCE AND STORAGE

The lifetime of a pH sensor has a significant impact on the total costs of onwnership and performance of the entire pH measuring loop. Improving four key areas will lower costs and optimize process control and overall plant efficiency. These four key area's are:

maintenance & storage,

operator skill-set,

sensor selection, and

calibration

WE WILL SHOW YOU ALL DETAILS

Maintenance

Cleaning and calibration will always involve some amount of maintenance.

So, where should you pay attention to?

A clean reference should have a potential difference of 0 mV across the junction (it has open pores). On the other hand, dirty references will have a potential difference across the junction. Why is this important?

When measuring pH, the potential difference generated by the process across the pH sensitive glass membrane is a measure for the pH of the process. This value needs to be compared to the reference, which should of course be approximately 0 mV.

However, when the reference sensor is dirty, a potential difference is generated across the junction resulting in the measurement having a slower response-rate. In fact, total blockage of the reference will result in a non-responsive measurement. This is what we call a “changeable effect”. Luckily, by regular cleaning of the reference sensor, this effect is easily reversed, increasing the sensor lifetime.

A dirty pH sensitive glass bulb will result in a slow measurement. This - again - is a changeable effect, and by regularly cleaning the sensor, the sensor lifetime will increase, and the response rate of the sensor will be at its best.

ALL INFO TO TAKE YOU THERE

Each application is different, and optimizing the maintenance cycle is not always straightforward.. In some case, cleaning once a week is sufficient, but when a lot of dirt builds up, or the deposits are very heavy, it can be necessary to clean as often as every 8 hours! To complicate things further the type of cleaning liquid required can be different for each application.

DOWNLOAD YOUR FREE E-BOOK

Don't forget to download your free e-Book for more information on do’s and don’ts for pH sensor maintenance and storage.

Let's improve the pH measurement maintenance cycle and start increasing the lifetime of your pH sensor now!

Engineering Skills

The lifetime of a pH sensor has a significant impact on the total costs of ownership and performance of the entire pH measuring loop. Improving four key areas will lower costs and optimize process control and overall plant efficiency.

These four key areas are:

Maintenance & Storage

Calibration

Engineering Skill-set

Sensor Selection

Ms. Miranda told that one of the most rewarding tasks of her job as a Product Manager is visiting customers. Together with their service engineers, She enjoys helping customers who run into problems with their pH measurement. This can range from an unstable measurement, deviating pH readings or problems related to the sensor’s lifetime.

She emphasizes, the ultimate problem with pH measurements is often: no or limited process control. In each of these cases, the main question is: "How can I make sure I have a reliable pH measurement and extend the lifetime of my pH sensor?"

She wants to share with us many valuable lessons, so, welcome aboard and let's go. The four most important lessons related to engineering skills were:

1 - Use step by step approach on how to do the trouble shooting

2 - Patience

3 - Understand what the Slope and Zero of a pH sensor is

4 - Understand how temperature effects the lifetime of a pH sensor

The first two lessons apply in many situations, but are especially important in pH troubleshooting.

Lesson 1: Use Step by step approach

A systematic step-by-step approach is the most effective way for identifying the cause of the problem. This helps to make your troubleshooting procedures as efficient as possible.

First of all, following a logical structure in case of trouble shooting will help drill down the cause of the problem systematically. The sequence of this step-by-step approach is :

 

To increase the accuracy it is important to be patient and wait a few seconds longer.

Lesson 2: Patience

The second important lesson is patience. Hasty conclusions may not always be correct conclusions. For example, if a pH cable looks dirty, it might be tempting to blame it on a faulty cable. But, after following the 4 step-structure mentioned above patiently, another cause may become visible.

Proper calibration also requires patience. Regularly, Ms. Miranda told that she was at a customer sites with the service engineer performing calibrations on new sensors or older sensors. When the analyser would give the stable signal, she wanted to move it to the second buffer but the service engineer waited a bit longer to make sure it was really stable. This is important because an analyser is a computer and will only give the stable signal when the mV value has not changed for 5 seconds (standard setting). Sensors that have been installed for some time become slower. To increase the accuracy it is important to be patient and wait a few seconds longer.

So she alerts: The pH measurements always involve some time pressure but be patient when calibrating and troubleshooting. It will improve the accuracy of the measurement and will help you find the problem in the measurement easier.

Replace sensor WHEN...

Lesson 3: Understand what the Slope and Zero of a pH sensor is

Understanding what the Slope and Zero of a pH sensor means, will already give you an indication of the health of the sensor. When the sensor ages, it will become slower and the slope will go down. When process comes into the sensor (poisoning) the zero will shift.

SENSOR NEEDS TO BE REPLACED WHEN:

IF:

Slope < 80 %

Zero higher or lower (> +40mV or < -40mV)

How does temperature affect a sensor a sensor lifetime

Lesson 4: Understand how temperature affects the lifetime of a pH sensor

Temperature affects the lifetime of a pH sensor. Every 10°C decrease in temperature will double the lifetime of the sensor. Just look at he below chart:

CONCLUSION

Step-by-step approach

Patience

Slope and Zero of a pH sensor

Temperature Effects

Learning these four lessons have helped me improve my engineering skills and most importantly helped me improve the pH sensor lifetime of our customers. I hope sharing my own experiences will help you increase your pH Engineering Skills.

Miranda de Bruijn

THE PH AND ORP LEARNING HANDBOOK

To learn more about how pH measurements, in general, we recommend you this pH handbook:

Type: Adobe Acrobat Document  |  Pages: 72  |   Size: 7,87 MB 

YOU WILL LEARN

Measuring pH/ORP is a common procedure, but taking a true measurement and making the correct interpretation of the results is not always easy or simple. Part of achieving accurate and reliable pH/ORP measurements requires sufficient and correct maintenance and storage conditions.

From this handbook, you will gain a comprehensive understanding of pH/ORP measurements, the construction of the sensing elements, how to achieve reliable results, and use cases in process applications.

Besides a frequently asked questions and answers section, this handbook also includes a variety of other resources, such as a Chemistry Compatibility Table and a Liquid-Application data sheet.

Download the "Back to the pHuture - pH and ORP Handbook" and learn:

-The opportunities and challenges associated with pH and ORP measurement control;

-How to optimize hardware operation and life with proper maintenance;

-Typical problems that cause poor performance;

-Insights from various applications and solutions.

Tunable Diode Laser Analyzer Market 2025 – Global Analysis by Insight Partner

Tunable Diode Laser Analyzer Market 2025 – Global Analysis by Insight Partner.

The 'Tunable Diode Laser Analyzer Market 2025' report from The Insight Partners' which is available from Research and Markets website has an interesting article about Global Analysis and Forecasts by Measurement Type (In-situ and Extractive) demonstrate the laser analyzers market with the top ten companies accounting for approximately 50% of the market share.

The implementations of TDLA instruments are growing around the world

Tunable Diode Laser Analyzer market by measurement systems is segmented into in-situ and extractive measurement systems. The need to regulate the harmful emissions from industries and control the pollution levels in the environment has driven the need to look for instruments that can monitor emission levels thereby favoring for growing implementations of TDLA instruments.

THE RESEARCH PROCESS

The overall market size has been derived using both primary and secondary source. The research process begins with an exhaustive secondary research using internal and external sources to obtain qualitative and quantitative information related to the market. Also, primary interview were conducted with industry participants and commentators in order to validate data and analysis. The participants who typically take part in such a process include industry expert such as VPs, business development managers, market intelligence managers and national sales managers, and external consultant such as valuation experts, research analysts and key opinion leaders specializing in the Tunable Diode Laser Analyzer industry.

Tunable diode laser (TDLAS) based gas detectors and monitors – PKL Technologies Inc

Introducing Mr. Perry Kain from PKL Technologies

I recently met Mr. Perry Kain (President and Technical Director at PKL Technologies Inc.) from Edmonton, Canada and he is sharing with us some interesting information about tunable diode laser (TDLAS) based gas detectors and monitors.

TDLAS Open Path Advantages

•Specific to one gas – no interferences •Fast response times (< 1 second) •No consumables •Direct gas concentration measurement •Wide dynamic range (3+ orders) •Robust, reliable technology •Not affected by humidity, dust, heat, cold or rapid changes in temperature •No memory effects •Can’t be poisoned by exposure to ammonia •Better coverage (long open path monitoring covers large area) •Very low associated O&M costs

What else they provide...

PKL Technologies Inc. manufactures tunable diode laser (TDLAS) based gas detectors and monitors. Spectra-1 open path gas sensors are used in a variety of environmental and safety remote sensing applications. Spectra-1 gas sensors have been designed in a compact, easy to use, robust and portable format. Spectra-1 has been developed using proprietary hardware and software, to produce a low-cost alternative for open path gas monitoring. Spectra-1 can operate from a 1 to 1000 meter path length. Spectra-1 units are available in hydrogen fluoride (HF), ammonia (NH3), carbon dioxide (CO2), Carbon monoxide (CO), methane (CH4), acetylene (C2H2), ethylene (C2H4), and others. Spectra-1 is used for: portable gas detection, open path gas detection, landfill gas detection, continuous emission monitoring, emission reduction, ambient air monitoring, carbon dioxide monitoring, methane monitoring, HF monitoring, leak detection, fugitive emissions, gas monitoring and others.

Laser Gas Detection Principles of Operation

The identification of gas species by absorption spectroscopy goes back several decades. A molecule can be identified by its characteristic absorption spectra. If the frequency (or wavelength) of the infrared (IR) light source matches the vibrational frequency of the molecule, then light will be absorbed. The Beer-Lambert law is the linear relationship we use to calculate molecule concentration (ppm) from the characteristic absorption a molecule exhibits.

The Beer-Lambert law is written as: A = a(λ) * b * c

Where A is the measured absorbance, a(λ) is a wavelength-dependent absorptivity coefficient, b is the path length, and c is the molecule concentration.

Infrared Absorption spectra of Methane

One of these absorption features is chosen, that does not coincide with any other molecules absorption spectra. The wavelength of the tuneable laser is set very close to the absorption feature we want to measure. A laser is ideally suited for this as the light output is monochromatic. The laser wavelength is then scanned back and forth over this absorption feature. The resulting change in laser intensity when scanned over the absorption feature provides the information required to calculate the molecule concentration.

Open Path Laser Gas Detection

Open path gas detection is accomplished by transmitting the laser light through the area to be monitored for the specific molecule, and onto a photodiode for analysis. One way to perform this is to have the laser source and photodiode in one enclosure, and to use a reflective element to return the laser light back to the instrument.

TDLAS Open Path Advantages

•Specific to one gas – no interferences

•Fast response times (< 1 second)

•No consumables

•Direct gas concentration measurement

•Wide dynamic range (3+ orders)

•Robust, reliable technology

•Not affected by humidity, dust, heat, cold or rapid changes in temperature

•No memory effects

•Can’t be poisoned by exposure to ammonia

•Better coverage (long open path monitoring covers large area)

•Very low associated O&M costs

PKL Technologies Inc.

A206 2011 – 94th Street Edmonton,

Alberta, Canada T6N 1H1 780-486-9564

www.pkltechnologies.com sales@pkltechnologies.com

Press Release: Analyzers Experts

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It consists basically of a text, addressing the details and main characteristics of the equipment on the subject in question. The press release is not sent to the general public, but to specialists in the subject mainly for later, to divulge it to the other interested parties.

WE WILL SHOW YOU THINGS YOU HAVE NEVER SEEN

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MEET THE INFORMATION THAT TAKES YOU THERE.

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