[ Metal pipes and metal pipe connectors ]

Measuring instruments and apparatus, particularly for measuring pressure, absolute pressure, differential pressure, temperature, density, [ ph-value, ] quantity, particularly flow volume, [ humidity, ] force, acceleration, distance, [ angle, ] velocity, [ charging level, namely, metal measuring orifice plates, ] manometers, mano-vacuum meters, barometers, altimeters, thermometers not for medical purposes, thermo-hydrometers, hydrometers, pressure sensors, flow meters, pressure gauges, measuring converters; remote indicators, namely, pressure reference digital indicators and temperature reference digital indicators; control and regulating apparatus, namely, electronic control and feedback control devices for fluids and gas; flow monitors for fluids and gases; [ electric relays, electric contactors, ] switches, namely, pressure switches and temperature switches; position controllers, namely, position controllers used to determine the position of valves; pressure controllers for controlling the pressure of fluids and gaseous substances in industrial processes; electrotechnical and fluidic equipment and apparatus, namely, feed apparatus, namely, control valves for regulating the flow of gases and liquids, registering apparatus, namely, [ strip chart recorders; ] calibrators and calibration devices, in particular pressure compensators; testing bays comprised of computer component testing and calibrating equipment; electric and electronic control devices, namely, electric and electronic control devices for use in measuring and controlling pressure and temperature

Calibration and functional testing of measuring instruments