有电离室、正比计数器 、盖革-米勒计数器 、闪烁体探测器、切伦科夫计数器、半导体探测器等等。它的目的主要是用来记录粒子的数目/强度，以及将粒子携带的能量信息转化成相应大小电信号。
There are ionization chamber, proportional counter, Geiger-Miller counter, scintillator detector, Cherenkov counter, semiconductor detector and so on. Its purpose is mainly to record the number/intensity of particles and to convert the energy information carried by particles into corresponding electrical signals.
一般要求计数器具有一定的时间分辨率，即先后两个粒子射入计数器可分辨的时间。通常计数器常与定标电路和符合电路联合使用。
Generally, the counter is required to have a certain time resolution, that is, the time when two particles are injected into the counter. Usually the counter is used in conjunction with calibration circuit and coincidence circuit.