The detector circuitry then steps the full charge, which delivers an accurate estimation on the VOC focus. PIDs can detect VOCs in concentrations starting from fractions of elements for each billion, or ppb, to 1000s of areas per million, or ppm. Both GMW 15634 and VDA 278 common testing use https://gunnerrafjm.onzeblog.com/13440594/voc-test-no-further-a-mystery