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一、用途在制药、药检、化验、防疫和科研等工作中都经常应用电导仪来测定液体的导电情况。以测离子交换水和蒸馏水为例,测定其导电性能可间接地在一定程度上判断水的质量情况,水中所含导电杂质越多,电导值越大,电阻值越小,水的质量越差。通过试验知道,水的电阻值约在30万欧姆(3.3微欧姆电导)以上可认为这种水比较纯。但要指出,测定电导值只是检查水质量的一个方面,因为一些不导电的杂质用电导法并不能反映出来。电导仪还可做电导滴定的指示装置。二、电子线路的基本原理桥式电导仪(电子管型和晶体管型)的基本结构方
First, the use In the pharmaceutical, drug testing, laboratory tests, epidemic prevention and scientific research work are often used conductivity meter to determine the conductivity of the liquid. Taking ion-exchange water and distilled water as an example, the determination of the conductivity can indirectly determine the water quality to a certain extent. The more conductive impurities contained in the water, the larger the conductance value, the smaller the resistance value and the worse the water quality . It has been found through experimentation that water has a resistance value of approximately 300,000 ohms (3.3 micro ohm conductance) and may be considered relatively pure. However, it is important to point out that the determination of the conductance value is only one aspect of the water quality check, as some non-conductive impurities can not be reflected by the conductivity method. Conductivity meter can also do conductance titration device. Second, the basic principles of electronic circuits Bridge conductivity meter (tube type and transistor type) of the basic structure of the party