- cursor arrows
- curve parameter
- cut-in
- cubic centimeter
- cubic yard
- cumulative
- cupanemometer
- cyclecounter
- cycling
- deadbeat algorithm
- decigram
- deferred
- deflectometer
- data position
- dead
- decameter
- damping period
- dead time
- decalitre
- deciliter
- decimal scale
- deflection method
- decagram
- decaliter
- deflecting
- delay network
- density balance
- desired condition
- desired level
- density probe
- depth mark
- derivative control
- detection time
- diaphragm gauge
- differential gap
- depth manometer
- derivative network
- describing function
- desired range
- detection limit
- detector cell
- dial pointer
- dial scale
- dip circle
- depth measurement
- derivative action
- derivative element
- detecting relay
- direction arrow
- differential game
- differential threshold
- diffractometer
- digital counter
- digital reading
- discrete system
- dish thermometer
- display time
- directional diagram
- directional element
- displacement ton
- distance sensitive
- disturbance level
- divided beam
- disturbance
- Doolittle viscometer
- download
- down arrow
- draft gauge
- drift compensation
- dual counter
- dynamic accuracy
- dynamometer wattmeter
- earth gid
- effector
- efflux viscosimeter
- electric controller
- electric flowmeter
- electrodynamic movement
- electric hygrometer
- electrolytic hygrometer
- electromagnetic flow
- electronic gauge
- electronic ohmmeter
- electronic gage
- electronic thermometer
- end measure
- engaged line
- environment monitoring
- Engler viscometer
- error coefficient
- error indication
- error signal
- euliometer
- event recorder
- excitation
- event counter
- excess meter
- expansion movement
- expansion thermometer
- Fahrenheit thermometer