Why can the microLGD measure without a reference channel and what are the advantages of this?
In a traditional infrared gas detector, the light is emitted by a light source, passes through the gas volume to be measured and is then captured by an infrared detector. As the light incident on this detector depends on both gas concentration and emitted light intensity, NDIR gas detectors need a second infrared detector (and a second electronics channel) to yield information about the performance of the light source, which degrades over time. In contrast to this, the innovative, patented measurement principle incorporated into the microLGD device allows extraction of both concentration and light intensity information from one single photodiode due to laser modulation and lock-in technique. This measurement principle eliminates the need for an additional detector/electronics channel and offers the associated cost savings. It also enables stable and robust gas detectors because the possibility of differently degrading measurement and reference channel (leading to false readings) is exc
