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2 个 温度电阻串联, 加电自热|      +----------------------+--- + 12v<br />     |                      |<br />     |                      |<br />     |                     2.2K      +-----100K------+<br />     |                      |        |               |<br />     pt100 水气界面         +--------+               |<br />     |                     2.2K      |    +------+   |<br />     |                      |        |    |      |   |<br />     |                      地       +----+ +    |   |<br />     |                                    |      +---+---->> OUT<br />     +------------------------------------+ -    |<br />     |                                    |      |<br />     pt100 容器底部                      +------+<br />     |                                      741           <br />     +-----------------------地<br /><br />     2个2.2K 可用 5K 的电位器<br /><br /> | 
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