Features ● Specific ignition route ● Simultaneously testing K and Na ● Liquid petroleum gas (LPG), (Liquid natural gas (LPG) is better) as fuel Main specifications ●Stability: After 15 seconds injection of samples, indictor drift ≤2% ●Reproductivity After 7 times testing by standard samples, indicator drift ≤2.5% ●Linear error: K is 0.02-0.07 mmol/L. Na is 1.1-1.6 mmol/L