REGXA1 - One-Click Ratio Analyser Kit NEWLY UPGRADED MODEL! The Regin One-click analyser has been refreshed, updated and renewed. Key upgrades over previous model Large 6 line display CO sensor overrange protection Wireless printing to optional printer Rechargeable batteries and USB charger included 10 year warranty when returned annually for recertification/calibration Measures: CO 0-2,000ppm O2 0-21% Calculates: CO2 0-20% CO/CO2 ratio Excess air Combustion efficiency Supplied with analyser, probe, batteries and USB charger