- faber viscometer
- factory control
- extension bent
- exploratory drift
- factory setting
- fathom
- fault pit
- faulty measurement
- feedback
- feedback compensation
- feedback loop
- feedback regulator
- feedforward control
- feeding zone
- feeler pin
- ferrodynamic wattmeter
- float gauge
- float viscosimeter
- flow deflector
- following error
- fluerics
- float
- flueric
- foot-candle
- form errors
- forward path
- freezing temperature
- freight ton
- fuel metering
- frequency metrology
- frequency transformation
- galvanometer movement
- frequency locus
- front panel
- funnel viscometer
- gage hole
- gain margin
- gain scheduling
- gallon
- functional decomposition
- gage level
- gage stand
- gain asymptote
- gaging nipple
- gain measurement
- gasoline meter
- gate input
- gauge tube
- gauss meter
- Gaussian system
- Gaussian units
- gas meter
- gas thermometer
- gauge stand
- geodetic network
- geologic thermometer
- gimbal
- geographic net
- glass thermometer
- globe
- globe thermometer
- geodetic log
- gram-ion
- graphic panel
- graduating soring
- graduating spring
- gram calorie
- gravimetric meter
- hair hygrometer
- guiding mark
- harmonic detector
- hairline
- head meter
- haze meter
- height gage
- height gauge
- hole sight
- high reading
- hot wire
- homogenous network
- hour hand
- hydraulic amplifier
- hydraulic capsule
- hydrostatic gauge
- hydraulic thermometer
- identification
- hundredweight
- hydraulic diagram
- idle mode
- hypsography
- immersion thermometer
- impulse length
- impulse modulation
- impulse train
- impulse response
- indication range
- in-process
- index coverage
- index hole
- indicating scale