Construction, installation, repair, maintenance and calibration of computer hardware, mass flow meters, to measure the mass flow of gases, liquids and vapors, mass flow controllers, to control the mass flow of gases, liquids and vapors vapors, mass flow calibrators, to calibrate the mass flow of gases, liquids and vapors, electric pressure transmitters, electronic pressure controllers, control valves, volumetric flow meters, in particular magnetic-inductive flow meters, turbine flow meters, positive displacement flow meters, ultrasonic flow meters, eddy frequency flow meters (vortex flow meters) and apparatus for data processing; installation and repair of apparatus and instruments for measuring, calibration, checking, analysis and benchmarking purposes; consultancy and information relating to the aforesaid services.