碳黑含量达40%左右的塑料粒子仍然可以使用金属探测器，该客户因为一直没有专业的支持，因此设备自安装后就一直没能正式使用。直到2年多后，我们将其恢复！金探的开孔尺寸是250*750mm，产品信号大约在2000，设置限值在4000，最终的检测精度是2.5 Fe, 3.0 NFe, 4.0 SS，这是一个令人满意的结果，因为在过去的近三年时间金探根本无法使用！

Metal detectors can still be used for plastic particles with a Carbon content of around 40%. Because there has been no professional technical support, the device has not been officially activated since it was installed. After about 2 years, we recovered performance. The hole size is 250*750mm, the product signal is about 2000, the setting threshold is 4000, and the final detection accuracy is 2.5 Fe, 3.0 NFe, 4.0 SS.