- Tagliabue viscometer
- tandem motor
- telecounter
- switching chain
- system analysis
- system bandwidth
- tactile sensor
- televoltmeter
- temperature sensor
- temporal decomposition
- telemetering system
- telewattmeter
- temperature indication
- temperometer
- tensimeter
- test bed
- terminal block
- termination procedure
- test equipment
- test gage
- test gauge
- test hole
- test laboratory
- test load
- test probe
- test prod
- thermal compensation
- thermal instrument
- tester
- thermocouple instrument
- thermocouple pyrometer
- thermography
- thermostatic gauge
- thermowell
- thermistor thermometer
- thermocouple
- thermocouple thermometer
- thermoelectric thermometer
- thermometry
- thief hole
- threshold control
- threshold limit
- time meter
- time recorder
- thermistor
- thermoelectric thermometry
- thermometer well
- thermoscope
- threshold detector
- throttling calorimeter
- throughput rate
- three-step
- threshold value
- throttling
- throughput time
- time control
- timescale
- tonometer
- torque indicator
- torque gauge
- torquemeter
- torsiograph
- torsion viscometer
- total error
- touch sensor
- touching key
- tracing speed
- torsion viscosimeter
- totalizing counter
- track recorder
- topographic surveyor
- total size
- touch input
- traceability
- traction dynamometer
- traffic cop
- transfer coefficient
- transfer function
- transfer matrix
- transient overshoot
- transient behaviour
- transient time
- trend recorder
- trial boring
- trimming resistor
- trimming element
- trimming kit
- troy weight
- transient behavior
- transient deviation
- transition value
- transportation source
- tray thermometer
- truncation condition
- tube float
- turbine meter
- trimming screw
- true-bore
- ultrasonic flow
- ultrasonic flowmeter