- calibration service
- cadastre
- calibration value
- calliper gauge
- capillary flowmeter
- capillary viscometer
- caplastometer
- carat fine
- cascade compensation
- causal system
- cautious control
- ceisius thermometer
- cell control
- centigram
- centilitre
- centralized control
- centiliter
- chart drum
- centiare
- centimeter
- chart feed
- chromatograph
- cleaning eye
- clinical thermometer
- clock changeover
- clocked system
- clocking
- climatologic network
- coil
- command destruct
- command action
- commercial thermometer
- compensator
- compensation value
- computing synchro
- comparative measurement
- compensating instrument
- compensating network
- compensation time
- compression meter
- conduction test
- conductivity cell
- condensation hygrometer
- conductor pipe
- comparing element
- comparison measurement
- compressometer
- connection voltage
- computer control
- conductivity recorder
- console display
- contact head
- contact sensing
- contamination monitoring
- continuous control
- control accuracy
- control assay
- control spillover
- contract packaging
- control transfer
- control variable
- continuous system
- control film
- control flume
- control hierarchy
- control operator
- control potentiometer
- controlled variable
- control arm
- control element
- control instruction
- controllability
- core bit
- core drift
- core hole
- coring tool
- corrected result
- correction time
- corrective action
- correlation interval
- coulomb gage
- counting instrument
- counting result
- Coulomb gauge
- counter
- course programmer
- coverage
- cowl
- cryometer
- cubic centimetre
- cubic decimeter
- cubic inch
- cubic measure
- cubic measurement
- cup viscometer
- current compensator
- current probe
- current range
- current reading
- current recorder