The problem existing in the original resistance type level indicator is analyzed. The superiority of applying electronic sensor to measure coal level and modification process are narrated in detail.
对原电阻式料位仪存在的问题进行了分析，详述了应用电子传感器检测料位的优越性及改造过程。
The increased internal resistance within an improved zero indicator helps increase the sensitivity of the AC bridge and thus can be available for any type of capacity bridge and induction bridge.
示零器电路改进后的交流电桥，增大了示零器电路的内阻，提高了交流电桥的灵敏度，对任何形式的电容电桥、电感电桥都适用。
When internal resistance is alarmed, the alarm lamp lights; when voltage is alarmed, voltage indicator lamp lights.
当出现内阻报警时报警指示灯亮，当出现电压报警时电压指示灯亮。
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