Since the current produced by light activated triode is larger, it is possible to use common microammeter to measure the photocurrent, making the experiment easier. 由于光敏三极管的光电流较大，测试光电流时，可用普通的电流表（微安表）进行测量，使实验变得简单可行。
In the studying of the specific property of the diode, the zero drift of the microammeter is caused by electromagnetic wave, and it has great effects on the result of the measure. 在二级管特性研究中,由于电磁波的影响引起的微安表零点飘移对测定结果有较大影响。
This system made by Peltier and highly precise microammeter is very useful to measure the temperature dependence of some small-size photoelectricity devices. 介绍了一种光电二极管暗电流温度特性的测量系统，该系统采用了热电致冷器件和高精度的微电流计，非常适合测量一些小型光电器件的温度特性。
Model JO415 DC microammeter is suitable for students to measure weak current and slimelectric potenial in laboratory of middle school and polytechnic school. JO415型直流安培计适用于中学、中专等学校实验室，可测微弱电势用。
