Notation	Name	Description	Status
400	Fluorometry, optical backscattering	Measurement of emitted fluorescent light and particulate back...	stable
401	Mercury-based thermometry	Measurement of temperature using a mercury based column.	stable
402	Fluid-based thermometry (excluding mercury)	Measurement of temperature using a fluid based column (other ...	stable
403	Electrical resistivity	Measurement derived from the measurement of electrical resist...	stable
404	Electrical conductivity	Measurement derived from the measurement of electrical conduc...	stable
405	Inductivity	Measurement derived from the measurement of magnetic inductan...	stable
406	Piezoresistivity	Measurement of the change in electrical resistance of a mater...	stable
407	HF echo Doppler spectra analysis method (HR radar)	Remote sensing of surface currents employing radars frequenci...	stable
408	GPS fixes sequence comparison	Measurement derived from the difference between two successiv...	stable
409	Clark electrode polarographic method	The dissolved oxygen concentration by counting the number of ...	stable
410	Oxygen luminescence quenching method	The fluorescent indicator is a special complex embedded in a ...	stable
411	Potentiometric method	Ion-sensitive field-effect transistor that responds to proton...	stable
412	Radiometry	Measurement of the number of photon reaching a surface using ...	stable