指机械的、电子的或化学器件，用于区分、记录或指示环境中某一变量的变化，如温度、压力、电荷、电磁辐射、核辐射、粒子或分子等。如紫外检测器是将通过待测物质后的光强变化转化为电信号的器件，这类信号转换器英文中又称为transducer。

-Refers to mechanical, electronic or chemical devices used to distinguish records in a particular environment or direction of changes in variables such as temperature, pressure, electric charge, electromagnetic radiation, nuclear radiation, such as particles or molecules. If the UV detector is the material through the post-test changes in light intensity signal into the device, this type of signal converters, also known as English in the transducer.