SDC2501 is a device that measures PM2.5. It can send measured PM2.5 values via USB.
SDC2503 is a device that measures PM2.5 and formaldehyde. It can send measured PM2.5 and formaldehyde values via USB.
You must first have a Novotel SDC2501 or Novotel SDC2503 device before this program can work properly.
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