实验采用单光路临界角法，用四象限探测器探测输出信号，物面微位移采用压电陶瓷作为驱动元件。
The experiment came into use single light path critical angle method, output signals were detected by four-quadrant receiver, micro-displacement drive element were piezoelectric ceramics.
通过对这些设备进行编程，当压力水平达到临界值时，就表示需要更换元件了。
With ability to program these devices, reaching a threshold of pressure level indicates it is time to change the element.
如需测量的对象温度变化范围很小，或需要测量临界点温度，则可应用热敏元件。
When the temperature measurement is made on low variations or to detect a threshold, a thermistor can also be used.
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