This module can be purchased on Xinabox CC.
The SG33 makes use of the CSS811 produced by AMS. The CSS811 is a ultra-low power digital gas sensor used for monitoring indoor air quality.
The SG33 ☒CHIP is housed in an extremely compact 2U×2U ☒CHIP with four connection ports.
More information on the CSS811 can be found in the datasheet.
To install the libraries please followed the guide provided on the Arduino Website under "Importing a .zip Library".