Most changes in gas composition are detected using a MOX sensor.
A MOX sensor is essentially a heated metal oxide surface that alters electrical resistance in response to the amount of oxygen present on its surface.
In contrast to reducing gases like VOCs, which consume oxygen by burning on the metal oxide surface, oxidizing gases like NOx, which provide more oxygen than ambient air, increase resistance.
Water vapor often behaves as a reducing gas, hence humidity also affects the MOX sensor output. A humidity sensor like Sensirion’s SHTxx can be used to account for this.
The SGP4x sensors from Sensirion have built-in humidity adjustment.
In order to better comprehend the activities connected with gas events in interior environments and detect relatively short-term changes in gas compositions, Metal-Oxide(MOX) Gas is an effective tool.
Semi-quantitative and broadband-sensitive MOX sensors
Under laboratory conditions, the absolute concentration of the target gas in the air can be determined by calibrating the MOX resistance to a particular target gas.
The Global Metal-Oxide(MOX) Gas Sensor Market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
Cambridge CMOS Sensors (CCS), a semiconductor business with market-leading gas sensor solutions to monitor the immediate environment, recently announced the release of CCS811, the first digital member of its CCS800 product family of ultra-low power micro gas sensors.
The CCS811 integrates a metal-oxide(MOX) gas sensor with a microcontroller sub-system, enabling Indoor Air Quality Monitoring, ease of design, increased battery life, and lower system costs for smartphones, wearables, and connected home devices.
It is based on CCS’s patented Micro-hotplate technology, which provides a highly dependable gas sensor solution, extremely quick cycle times, and a considerable decrease in average power usage when compared to conventional metal oxide gas sensors.
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