24
- May
2019
Posted By : Becca Dodds
Techy Talk – Why GFC rocks…..

The gas analysis industry is highly dynamic (that’s why we love it). New applications are always emerging and with an increase in public concern over safety and the environment, legislation is more stringent than ever. These factors along with user needs to reduce costs and improve efficiency means there is a growing demand on manufacturers to develop low cost, long life, high performance gas sensing technology.  

The technology has already advanced dramatically over the years. Back in the 1960’s the most common method of measuring was to use LUFT (German for Air) technology. However, LUFT was very susceptible to vibrations (some using microphonic type detectors) and the components were bulky and heavy, making analysers cumbersome to use in field applications such as emission stack monitoring.

In 1981 GFC (Gas Filter Correlation) infrared technology was developed in Japan. GFC optics use a gas filled cuvette system, the gases used to fill the vessels are the target gas to be measured and then a reference gas which is typically nitrogen. GFC technology allows the use of the fine line structure of the target gas to obtain the best selectivity and rejection of most interferences offering a highly stable and accurate reading.

By the use of a single gas cell, the optical bench is reduced in both size and weight and has a simplified optical structure so that costs are reduced (hooray).  

Genius Gas Innovations developed the Venus Solo OEM sensor using our own twist on GFC technology. (Of course we cannot tell you what the twist is, that’s a secret……)  

The Venus Solo is available in over 35 gases from common gases such as carbon dioxide (CO2), methane (CH4) and carbon monoxide (CO) to the more exotic gases such as carbon tetrafluoride (CF4) and ethanol (C2H5OH)

Using specific gas cell lengths, the Venus Solo can measure trace gases from as low as 0.1 ppm to high resolution purity readings of 100%, making the sensor ideal for use in medical gas measurements, gas blending applications and the ASU (Air Separation Unit) market.

The cuvette system used by Genius Gas Innovations also eliminates temperature stability and performance issues. Using a solid state detector of modern design also allows the improvement of detection levels from advances in the detector without major changes to the optical structure or significant cost.

GFC technology offers the widest range of gas types and the greatest choice of measurement ranges in a stable and compact platform. With a low cost of ownership and minimal maintenance this technology offers the best solution for any OEM integrator and analyser user (Psst, go check out our Venus Pro) required to monitor trace or purity gases.

This is why we think GFC rocks…..

Co-Authors – Becca Dodds & David Booth

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