JO401演示电表是根据新的教学大纲，为普及九年制义务教育而设计的新型演示电表，可用于测量直流电流、直流电压、也可作检流计用，是教学中研究磁电系电表结构的直观教具，该表有良好的直观性，高的可见度，操作方便，结构合理，采用优质磁钢的内磁结构。使仪表的磁性稳定，灵敏度高、重量轻、携带方便，表头采用硅二级管保护电路，可防止过载电流损坏电表，而且具有价廉、物美、质好的特点。
The JO401 Demonstrating Galvanometer is an ideal visual aid specifically esigned according to
the devised educatble schema for the 9-years compulsory educational plan .besides working as
galvanometer,it is suitable for measuring educational plan.provides such excellence as magnetic stabiliry,high accuit which can prevent damages from overloading .other excellence can be listed as following;visual convenience,openness easily to control, excellent arrangement high and cheap in price etc.
The JO401 Demonstrating Galvanometer is an ideal visual aid specifically esigned according to
the devised educatble schema for the 9-years compulsory educational plan .besides working as
galvanometer,it is suitable for measuring educational plan.provides such excellence as magnetic stabiliry,high accuit which can prevent damages from overloading .other excellence can be listed as following;visual convenience,openness easily to control, excellent arrangement high and cheap in price etc.