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Targeted HCHO Detection: Add dedicated formaldehyde detection to indoor air projects with a compact module that helps report HCHO concentration data for device based air functions Compact PCB Footprint: The open-board layout with solder pads fits tight enclosures and board mounting assemblies, helping electronics builders use limited installation space more efficiently Flexible Low-Voltage Use: for 3.3V or 5V input helps this detection board fit different controller setups while keeping power planning practical for compact builds I2C Ready Integration: The digital I2C interface supports cleaner controller communication for embedded development, reducing wiring complexity during connected hardware prototyping Project Focused Package: A single module is included for indoor air, home automation, or air cleaner integration work, giving developers a straightforward part for prototype testing and upgrades