摘要
Ｅｈ值是评价地下水环境的重要参数。由于Ｅｈ值随着环境的改变而不断变化，因此取样后应立即测试。我们研制出适合野外现场测试的ＹＦ—２型Ｅｈ计，此仪器小型轻便，供电电源交、直流均可。经野外现场应用，获得满意效果。本文对该仪器组成、工作原理、使用方法做简要介绍。
Eh value is an important parameter for evaluation of the graundwater environment. Because Eh value changes with the different environments.It should be measured right after sampling.We have developed an Eh meter which fit to the field measurament. This meter is small in sire and light in weight, and the electricity for it can be both direct current and alternating current,so it obtains a satisfacfory result through its application in field. The papper has made a brief intraduction about the composition of the meter, its working principles and its method for use.
