Environmental Laboratory

  • Compact OEM gas analyser modules based on quantum cascade laser technology
    The module is very compact
  • For clients who want to test out the module, a friendly software allows users to easily monitor gas concentrations (here, NO and NO2).
  • Clients can first test the module in their R&D lab before OEM integration

Compact OEM gas analyser modules based on quantum cascade laser technology

Jan 16 2019 Read 825 Times

Existing laser-based gas detection technologies have reached a performance plateau. Indeed, traditional diodes do not lase in the mid-infrared fingerprint region where molecules absorb best and therefore are limited in sensitivity. NDIR techniques suffer from cross-interference and make it difficult to selectively detect a species. FTIR techniques can sometimes do the job but are rather expensive. Multi-pass cells don’t scale down in price with volume production and the mechanical moving parts don’t make it a robust solution for vibrating environments. Finally, the problem of cross-interference is not limited to laser-based techniques but can also be considered for other techniques like electro-chemical cells or paramagnetic techniques.

mirSense has developed a solution to meet these needs. After several years of development inside semi-conductor private labs, the mirSense company enters the market of gas analysis with a product innovation that combines high performance (sub ppm detection limits), small dimension (the size of a matchbox) and good cost-benefit ratio: the multiSense.

The multiSense combines two technological bricks: infrared quantum cascade lasers (QCL) and a heated photoacoustic cell. Both bricks have reached industrial maturity after several years of development.

QCL lasers are one of the few technologies able to emit in the mid-infrared (3µm to 12µm of wavelength) at ambient temperature and in a direct way. This wavelength range, well-known to spectroscopists, is the most significant range for the analysis of gas components because of the very strong absorption lines, with many molecules displaying a unique fingerprint. This range is well suited for trace detection of molecules.

Coupled to the lasers, the second technological brick, a heated photoacoustic cell, allows the detection of the spectral signature of the gases. By absorbing mid-infrared radiations, the gas will create a sound and emit various acoustic pressures that are detected by microphones. This system has no moving parts and is therefore more robust than multi-pass cells. It also has a great dynamic range with no saturation of the detector, allowing to measure from 1 to thousands of PPM for example.

Thanks to its know-how and by combining these two proprietary technologies, mirSense can offer detection performances of a few molecules amid one billion (10 ppb) in a very small format of a few cubic centimeters of volume, 10,000 times smaller than the current systems, for a cost inferior to current technologies.

The strategy of mirSense is not to sell an analyser to the end-users but rather to supply customised OEM modules for manufacturers of analysers that will integrate the mirSense modules inside their chassis.

Reader comments

Do you like or dislike what you have read? Why not post a comment to tell others / the manufacturer and our Editor what you think. To leave comments please complete the form below. Providing the content is approved, your comment will be on screen in less than 24 hours. Leaving comments on product information and articles can assist with future editorial and article content. Post questions, thoughts or simply whether you like the content.

Post a Comment

Digital Edition

International Environmental Technology Buyers Directory 2019

August 2019

A Comprehensive Bibliography of Who’s Who in Environmental Analysis & Monitoring This guide has been produced as a reference of manufacturers and suppliers with their full contact details. The c...

View all digital editions


World Water Week 2019

Aug 25 2019 Stockholm, Sweden

Sensor China

Sep 02 2019 Shanghai, China

Aquatech Mexico

Sep 03 2019 Mexico City, Mexico


Sep 04 2019 Gwangju, South Korea

NSC Congress & Expo

Sep 06 2019 San Diego, CA, USA

View all events