我们曾为某矿山选矿车间做了一种“矿浆浓度计”,用来测定管道内水与矿石粉混合物中矿石粉的含量。整个测量仪表由电离室、弱电流放大器及显示部份组成。采用电离室做探头,比用光电倍增管和计数管来得稳定、寿命长,缺点是灵敏度低。为了提高灵敏度,在电离室内充较高气压的气体,增加电离室极板的片数,并采用较高原子序数的金属做电离室极板。本文仅对电离室结构特点做简单介绍。电离室结构示意图见图1。 We have done for a mine dressing plant, a “slurry concentration meter”, used to determine the pipeline of water and ore powder mixture of ore powder content. The entire measuring instrument from the ionization chamber, weak current amplifier and display part. The use of ionization chamber probe, than the use of photomultiplier tube and counter tube to be stable, long life, the disadvantage is the low sensitivity. In order to improve the sensitivity of the ionization chamber filled with higher pressure gas, increasing the ionization chamber plate number, and the use of higher atomic number of metal ionization chamber plate. This article only ionization chamber structure to do a brief introduction. Ionization chamber structure diagram shown in Figure 1.