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

The press release is one of the main tools for external communication.

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

We will publish in our blog Analyzers Experts as the main channel of information for engineers, instrumentation technicians, and designers, entrepreneurs team, and users in general, consequently arousing their interest in talking about the subject. We will be the spokesperson for the company, publishing the innovations and launches in Analytical Instrumentation for control and safety of industrial processes. We will offer exclusively to the subscribers of our list every article that is posted on our blog if you have not yet subscribed, click here.

MEET THE INFORMATION THAT TAKES YOU THERE.

Our aim is to eliminate the volume of information from multiple senders and to focus everything in one place, with really relevant information, delivering rich and useful content to users, effectively being available on the blog whenever necessary.

Analyzers Experts

Let's Connect Experiences Worldwide

Here you are being connected to a network of resources for mutual development and growth. We can achieve our greatest success through our relationships with others experts. Let's build and maintain Analyzers Experts network. Our goal is supporting each other. Join us! Together we are able to build a strong and most reliable professional network.

 

Analyzers Experts

We want to know the best analyzer for our application

We are focused on one thing: helping you take your organization to the next level. We're passionate about things like innovation, technologies, sharing user's experience, but the most important part is studying all details from new analyzers available around the world.

 

Analyzers Experts

The best success cases in just one place

Why settle for anything less? We'll share and demonstrate how analyzers and control techniques are applied to increase capacity, enhance project and production, improve efficiency, increase profitability and meet regulatory requirements.

Translate »
error: Content is protected !!