- measuring arrangement
- measuring cell
- measuring converter
- measuring current
- measuring data
- measuring flume
- measuring force
- measuring head
- measuring laboratory
- measuring methods
- measuring orifice
- measuring path
- measuring position
- measuring pressure
- measuring relay
- measuring task
- measuring valve
- memory pointer
- meter case
- metric carat
- metal gage
- microscrew
- metalic thermometer
- meteorological network
- metering balance
- metric horsepower
- micrometer head
- millimetre
- mine surveying
- minimun thermometer
- midriff
- minimal realization
- mine dial
- minor loop
- minute hand
- meter dial
- meter flume
- metering port
- metrology
- microbalance
- micrometer scale
- midscale value
- mine surveyor
- mirror scale
- model reduction
- multi meter
- multiprocessor control
- multirange
- molecular heat
- motion control
- multidial
- multiposition element
- myriagram
- navigation screen
- negative feedback
- net ton
- neutral stability
- noninteracting control
- north arrow
- nonrepeatable measurement
- normal gid
- notch
- Nyquist plot
- null instrument
- numeric
- Nyquist contour
- Nyquist diagram
- O2-meter
- observation spillover
- observer
- offset temperature
- oil gauge
- offset
- open gauge
- open loop
- operating key
- operational test
- operations room
- ophthalmometer
- ophthalmotonometer
- optical comparator
- optical flat
- optical graticule
- observability
- odorimeter
- oil scout
- optimal control
- optimal smoother
- organic hygrometer
- orifice meter
- orifice plate
- orifice orienting
- ounce
- outflow meter
- outlier
- overrange limit
- overshoot
- overweight
- oxygen point
- overpressure gage