Gas sensor ICs offer easier indoor air-quality monitoring

Gas sensor ICs offer easier indoor air-quality monitoring

New Products |
By Rich Pell

The company has implemented major upgrades to the software libraries of the CCS801, an analogue volatile organic compound (VOC) sensor IC, and the device firmware for CCS811, a digital VOC sensor IC. The upgrades have reduced the initialization period from over 48 hours to 60 minutes, which can reduce or even eliminate burn-in time at the factory.

These performance updates to the CCS8xx family also extend the air quality indication range from 8,194ppm to 32,768ppm for eCO2 value and the maximum eTVOC value measurement has been raised from 1,187ppb to 32,768ppb. This improvement means that CCS8xx sensors can operate in devices such as air cleaners and air purifiers in polluted indoor environments.

OEMs can also save and restore their own baseline values when the CCS8xx sensor is powered off and restarted in a polluted environment. In addition, the intervals between automatic baseline correction can be programmed by OEMs. These features ensure that the behaviour of the sensor can be more closely matched with the characteristics of its intended operating environment.

In parallel, ams has completed testing of the CCS8xx product family when exposed to HDMS and D5, the most common siloxanes used in personal care and household cleaning products, to demonstrate long-term reliability and high resistance to contamination by airborne siloxanes.

HMDS testing was performed in accordance with the ISO26142 standard. D5 testing involved exposure to a concentration of 250ppm for 200 hours. The tests indicate that CCS8xx sensors’ performance and relative sensitivity meet the tolerances allowable by all relevant standards.

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