pyrheliometer,直接日射强度表；日射表

pyroelectric optical transducer [sensor],热释电式光传感器

pyroelectric temperature transducer [sensor],热释电式温度传感器

pyrolysis apparatus,裂解器

pyrolysis gas chromatography,裂解气相色谱法

pyrometer lamp,高温计灯泡

pyrradiometer,全辐射表

Q factor,Q值因数

Q-percentile life,可靠寿命

quad array,方阵

quadrant-edge orifice plate,1/4圆周边缘孔板

quadrant electrometer,象限静电计

quadrupole field,四极场

quadrupole ion trap,四极离子阱

quadrupole mass filter,四极滤质器

quadrupole mass spectrometer,四极质谱计

quadrupole probe,四极探头

quadrupole residual gas analyzer,四极残余气体分析器

quadrupole rods,四极杆

qualification,鉴定

qualification standard,鉴定标准

qualification test,鉴定试验

qualitative analysis,定性分析

quantitative differential thermal analysis (QDTA),定量差示热分析

qualitative physical model,定性物理模型

quality,质量

quality assurance,质量保证

quality control (QC),质量控制

quality inspection,质量检验

quality management,质量管理

quality supervision,质量监督

quantitative analysis,定量分析

quantitative differential thermal analysis,定量差热分析

quantitative differential thermal analyzer,定量差热（分析）仪

quantity of heat,热量

quantity of illumination,光照量

quantity of radiant energy,辐射能量

quantity of radiation,幅射能量

quantity to be measured,被测量

quantization,量化

quantization error,量化误差

quantized error,量化误差

quantized noise,量化噪声

quantized signal,量化信号

quartet,四重布置；四重检测

quarter circle orifice plate,1/4圆孔板

quartz-Bourdon tube (pressure)gauge,石英弹簧管压力计

quartz crystal unit humidity transducer[sensor]晶体振子式湿度传感器

quartz module,石英组件

quartz spring gravimeter,石英弹簧重力仪

quartz thermometer,石英温度计；石英温度表

quasi-equilibrium theory,准平衡理论

quasi-molecular ion,准分子离子

quasi-periodic vibration,准周期振动

quasi-rigid rotor,准刚性转子

quasi-sinusoidal quantity,准正弦量

quasi-static unbalance,准静不平衡

quasilinear chareacteristics,准线性特性

quenching,阻塞

question and answer mode,问答式

queuing theory,排队论

quick thermophysical property measuring apparatus,热物性快速测定仪

quintet,五重布置；五重检测

quotient-meter,商值表

rack,框架

radar altimeter,雷达高度计

radial clearance,径向间隙

radial distortion,径向畸变

radial electrostatic field analyzer,径向静电场分析器

radial heat shield,隔热屏

radiance,幅射亮度；辐射率

radiance temperature,亮度温度

radiance thermometry,亮度测温法

radiant element,辐射元件

radiant energy,辐射能（量）

radiant flux,辐射通量

radiant intensity,辐射强度

radiant power,辐射功率

radiation,辐射

radiation balance meter,辐射平衡表

radiation detecting device,辐射检测器

radiation dose transducer [sensor],射线齐量传感器

radiation energy,辐射能量

radiation exitance,辐（射）出（射）度

radiation fin bonnet,散热片型上阀盖

radiation flux,辐射通量

radiation heatflowmeter,辐射热流计

radiation intensity,辐射强度

radiation monitor,辐射监测仪

radiation pyrometer,辐射高温计

radiation sensor,射线敏感元件

radiation temperature,辐射温度

radiation temperature transducer [sensor],辐射温度传感器

radiation test,辐射试验

radiation thermometer,辐射温度计

radiation thermometry,辐射测温法

radiation transducer [sensor],射线传感器

radio chromatography,放射色谱法