目前由Thermo Jarrell Ash公司提供的序列原子发射光谱仪是用检流计来定位每台仪器中单色器光栅的。这种技术在使色散光束横过系统出射狭缝扫描时有很高分辨率和再现性。Thermo Jarrell Ash公司于1982年首次提出这种设计。但直到1985年,才将其安装在特殊高分辨率仪器中。 At present, the serial atomic emission spectrometer provided by Thermo Jarrell Ash uses a galvanometer to locate the monochromator grating in each instrument. This technique provides high resolution and reproducibility when dispersing a dispersive beam across a system exit slit. Thermo Jarrell Ash first proposed this design in 1982. However, it was not installed in special high-resolution instruments until 1985.