We offer portable hand-held gas analyser (ga-12 plus)equipped with 2 or 3 electrochemical cells (typical configuration: o2, co, nonox)works with an external portable printer via wireless communication (ir led)up to 60 hours of work (version with replaceable alkaline batteries)fixed probe of two different lengths with inline filter and condensate trapdifferential pressure sensor - for measurements of chimney draft and flow velocity (with help of pitot tube)cooperation with digital rh and temperature sensorsmeasurements of gas and ambient temperaturesresults presented on lcd display (128x64) with backlightbuilt-in large memory for results savingcalculations of many additional parametersfirmware for gas calibrationtwo versions of power supply are possible:version with four replaceable aa batteries (alkaline, ni-cd or ni-mh)version with built-in li-ion rechargeable battery and aditional mains adapter for battery charging.