TL;DR
The Adafruit STCC4 is a compact sensor designed to measure CO₂ levels, along with temperature and humidity. It stands out because it uses thermal conductivity (TC) for gas measurement, a method that relies on the thermal properties of gases rather than traditional techniques like Non-Dispersive Infrared (NDIR) or photoacoustic methods. This makes it versatile enough to fit into various enclosures, making it ideal for a range of projects.