ZX21a型
ZX21型,0~99999.9Ω,精度:0.1级。
ZX21a型,0~111111.0Ω,精度:0.1级
ZX25a型,0.01~11111.11Ω,精度:0.02级。
ZX54型,0.01~111111.11Ω,精度:0.01级。