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Terms for subject Metrology (318 entries)

flow measuring facility	A device for measuring, or giving an output signal proportional to, the rate of flow of a fluid in a pipe
flow signal	That part of the electrode signal which is proportional to the flow rate and the magnetic field strength and which is dependent on the geometry of the meter tube and the electrodes
flowmeter	A device for measuring, or giving an output signal proportional to, the rate of flow of a fluid in a pipe
foot-pound-second unit	f.p.s. unit
Foundation Fieldbus™	Foundation Field-bus™ is an open, interoperable fieldbus that is based on the ISO's Open System Interconnect (OSI) seven-layer communications model. The Foundation specification is compatible with the officially sanctioned SP50 standards project of the ISA and the IEC
full scale	The highest value of the measured variable that a device is adjusted to measure
full scale value	The highest value of the measured variable that a device is adjusted to measure
gateway	A device to connect two different networks which translates the different protocols
German Association for Instrumentation and Control	Association responsible for the production of VDI/VDE Guideline 2187 on the user interface for sensor and actuator operation
German Electrotechnical Commission	One of the bodies responsible for standardisation work in Germany, serving in DIN and VDE
graduation	Any of the major or minor index marks on an instrument scale
GYLON	Registered trademark of Garlock Sealing Technologies, Palmyra, NY, USA
HALAR®	Registered trademark of Ausimont S.p.A. Tradename for ECTFE
half-life	The time span necessary for the atoms of a nuclide to disintegrate by one half
half-thickness	The thickness of an absorbing medium that will depreciate the intensity of a radiation beam by one half
handheld instrument	Battery-operated, portable measuring instrument for use in the field and in the lab
hard rubber	Hard rubber is generally suitable for use within the temperature range 0 °C to 90 °C. It has excellent abrasion resistance against small particles and good chemical resistance, particularly to leaching agents, acid and alkalis
HAStElLOY®	Registered trademark of Haynes International, Inc., Kokomo, USA
hazardous area	An area in which an explosive gas atmosphere is or may be expected in quantities such as to require special precautions for the construction, installation and use of electrical apparatus
hazardous location	An area in which an explosive gas atmosphere is or may be expected in quantities such as to require special precautions for the construction, installation and use of electrical apparatus