Portrait IAS GmbH emerged from the 1997 founded Ingenieurbüro Dr. Schmäh. Since then we are working in the field of calibrating gas analysers and dosing and evaporation of liquids. Our calibration gas generators HovaCAL are in the meanwhile a standard in the calibration of emission monitors. Our vaporiser technology HovaPOR is used for highly precise and pulsation free humidifying and creating organic vapour mixtures. Besides our standard products HovaCAL, HovaPOR and the gas mixer HovaGAS we are developing and manufacturing devices and systems for nearly all applications in the field of precision gas- and liquid delivery and vaporisation and humidifying.