... bacteria, dust, stink, sweat, etc. VOC is test the organic volatile gas in the air, mainly tolu Our air monitor is ... bacteria, dust, stink, sweat, etc. VOC is test the organic volatile gas in the air, mainly toluene, xylene etc (home decoration ... 70(yellow light) represent moderate volatile gases 71~99(red light) represent high volatile gasesVOC(volatile organic compound)Quality display light show red ...