Smartphone technology is improving day-by-day. There is a list of things your smartphone can already monitor, viz. light, movement, temperature, pressure and geographical location. What if it could also sense gas, and determine the various gases present? Well, the VTT Technical Research Centre of Finland claims to develop such a sensor!
The miniature gas sensor, which can be connected to mobile devices, is actually based on Fabry–Pérot interferometer, which, in common terms, is an optical filter. This means that the sensor is based on filtering light samples.
The technology works by throwing light of varied wavelengths across a sample of air. The property of different gases to absorb lights of different wavelengths comes to the rescue. Thus, by analyzing the quantity and type of light absorbed by the air sample, the gaseous components present in the sample can be determined.
The possibilities are endless. By monitoring the carbon dioxide concentration in the surrounding air, the air quality can be measured. By analyzing a person's exhalations while asleep, the sleep quality can be determined (can be applied to wearables as well?). Various other healthcare applications are possible.
Source: VTT Research
The miniature gas sensor, which can be connected to mobile devices, is actually based on Fabry–Pérot interferometer, which, in common terms, is an optical filter. This means that the sensor is based on filtering light samples.
The technology works by throwing light of varied wavelengths across a sample of air. The property of different gases to absorb lights of different wavelengths comes to the rescue. Thus, by analyzing the quantity and type of light absorbed by the air sample, the gaseous components present in the sample can be determined.
The possibilities are endless. By monitoring the carbon dioxide concentration in the surrounding air, the air quality can be measured. By analyzing a person's exhalations while asleep, the sleep quality can be determined (can be applied to wearables as well?). Various other healthcare applications are possible.
Source: VTT Research
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