transverse stiffness,橫向剛度

transverse wave,橫波

trap,收集器；陷阱

travel,行程

traversing of probe,前后掃查

trend analysis,趨勢分析

trend method,趨勢法

trend recorder,趨勢記錄儀

tri-colour thermometry,三色測溫法

tri-component borehole magnetometer,井中三分量磁測井儀

trim,閥內件

triple tandem quadrupole instrument,三級串聯四极質譜計

triple-point,三相點

striple-point of water,水三相點

triplet,三重布置；三重檢測

tripod,三腳架

tripping device for plankton net,浮游生物网閉鎖器

true value (of a quantity),（量的）真值

truncated Venturi tube,截尾文丘里管

trunk cable,干線電纜

T-S diagram (curve),溫鹽曲線

tube bubble,管狀水准泡

tube end piece [tip],管端塊[頭]

tubular level,管狀水准器

tumbling,翻滾

Tungsten-Rhenium thermocouple series,鎢錸系熱電偶

tungsten strip lamp,鎢帶燈

turbidimeter,濁度計

turbidity,渾濁度；濁度

turbidity transducer [sensor],濁度傳感器

turbine flow transducer [sensor],渦輪流量傳感器

turbine flowmeter,渦輪流量計

turbo molecular pump,渦輪分子泵

turbulence,紊流

turbulent flow,紊流

turn-off overshoot,斷開過衝

turn-on overshoot,接通過衝

turnable stator,可轉動定子

turns correction compensation,匝數更正（補償）值

TV-camera system,電視攝像系統

two-colour(radiation) thermometer,比色溫度計

two-colour temperature,比色溫度

two-colour thermometry,比色測溫法

two-dimensional location,平面定位；二維空間定位

two-step action,兩位作用

two-step control,兩位控制

two-step controller,兩位控制器

two-terminal standard resistor,二端（鈕）標准電阻器

two-way alternate communication,雙向交替通信

two-way simultaneous communication,雙向同時通信

stwo-wire temperature transmitter,兩線制溫度變送器

type,型式

type approval,產品定型；形式批准

type of action of an element or system,元件或系統的作用方式

type of protection of an instrument for explosive atmosphere, 儀表防爆形式

type of strain gauge,應變計（片）型式

type test,形式檢驗；形式試驗

U-port,U型端口

U-tube manometer,U形管壓力計

ultra-high vacuum,超高真空

ultra-high voltage electron microscope,超高壓電子顯微鏡

ultralongwave spectrometer,超長波光譜儀

ultrasonic anemometer,超聲波風速表

ultrasonic disc cutter,超聲樣品切割机

ultrasonic Doppler blood pressure transduce [sensor],超聲多普勒血壓傳感器

ultrasonic flaw detection,超聲探傷

ultrasonic flaw detector,超聲探傷儀

ultrasonic flow transducer,超聲流量傳感器

ultrasonic flowmeter,超聲流量計

ultrasonic hardness tester,超聲硬度計

ultrasonic level measuring device,超聲物位測量裝置

ultrasonic levelmeter,超聲物位計

ultrasonic methods,超聲法

ultrasonic sensor,超聲（波）傳感器

ultrasonic thickness meter,超聲（波）厚度計

ultrasonic transducer,超聲換能器

ultrasonic wave,超聲波

ultrathin section sample,超薄切片樣品

ultra-violet and visible spectrophotometer,紫外可見光分光光度計

ultraviolet filter,透過紫外線的濾光片

ultraviolet hygrometer,紫外濕度表

ultraviolet lamp,紫外線照射裝置

ultraviolet light transducer [sensor],紫外光傳感器

ultraviolet photo-electron spectrometer,紫外光電子能譜儀

ultraviolet photo electron spectroscopy (UPS),紫外光電子能譜法

ultraviolet radiation,紫外線輻射

ultraviolet ray intensity meter,紫外線強度計

ultraviolet remote sensing,紫外遙感

ultraviolet-visible detector,紫外﹛可見光檢測器

unaddressed operation,非尋址操作

unbalance,不平衡

unbalance component measuring device,不平衡分量測量裝置

unbalance mass,不平衡質量

unbalance reduction ratio (URR),不平衡量減少率

unbalance response,不平衡響應

unbalance vector,不平衡矢量

unbalance vector measuring device,不平衡矢量測量裝置

unbalanced output,非對稱輸出