Comparison : Item # 8007702, 2002 Ambient Air Monitor – CO (Carbon Monoxide)
Item # 8007703, 2002 Ambient Air Monitor – O2 (Oxygen)
Item # 8007704, 2002 Ambient Air Monitor – H2S (Hydrogen Sulfide)
Item # 8007705, 2002 Ambient Air Monitor – SO2 (Sulfur Dioxide)
Item # 8007706, 2002 Ambient Air Monitor – CL2 (Chlorine)