Assertion: detector's part | /r/HasProperty | ppm
Facets:
Source sentences:
text: At lower concentrations, e.g., 100 parts per million (PPM), the detector does not sound an alarm for many tens of minutes.
text: Whereas the natural units of measurement for an Infrared point sensor are parts-per-million (ppm) or the percentage of the lower flammable limit (%LFL), the natural units of measurement for an open path detector are ppm.metres (ppm.m) or LFL.metres (LFL.m).
text: If the CO level detected is below 70 parts per million (ppm) the alarm will probably not go off.