... used to measure the vehicles which useliquefied petroleum gas (LPG) and compressed natural gas (CNG) as well as alcohol as their ... (optional).FG-410(4G): HC, CO, CO2, O2, y , oil temp (optional), engine rotating speed (optional).FG-410(5G): HC, CO, CO2, O2, NO, y , oil ... mode: with big LCD screen and Chinese/English menuAccuracy : HC: { 12ppm vol (absolute error) or { 5% (relative error) Gas analyzer