Emissions Systems offers the 4/5 Gas Exhaust Analyzer, No. EMS 5002. This portable, stand-alone unit can test a vehicle in the shop or on the road, powered by the vehicle undergoing the test or an optional 110V/220V AC converter. It has an improved filtration system with a high-performance water separator, so it can pull more moisture out of the sample gas. The unit can show all four or five gases and AFR or LAMBDA, displayed on the 3" by 5" back-lit display. Along with the display, the unit's internal electronics have also been improved, including a new PC wireless interface.