In lab the most often used is electron multiplier and semiconductor type.
实验室常用的是电子倍增器和半导体型光二极管。
Three types of ion gauges with tube electron multiplier are developed. It intends to solve the low pressure measurements up to 10~(-14) torr.
研制成功了三种结构的具有管型电子倍增器的电离规，企图解决低到10~（-14）托的压强测量问题。
A new kind of channel electron multiplier with big size has been made. It can be used for detection of ions.
研制了大型号的通道电子倍增器，其性能基本满足离子检测的要求。
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