题目内容

下列关于传感器的说法错误的是( )

A. 霍尔器件是磁补偿式电流传感器实现非接触式电流测量的关键
B. 压电式压力传感器和压电式加速度传感器主要用到材料的压电效应
C. 一般来说,陶瓷湿度传感器的电阻随着湿度和温度的增加而减小
D. 湿度传感器一般采用直流电压,因为交流电压会引起感湿体内水分子电解,导致电导率下降

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