㈠Features:
   Ⅰ We use  precision  instruments dedicated  silver contact switch,which has a small contact stress,

      contact resistance and its small variation and long service life, etc.
   Ⅱ There  is no zero  indicating  value at the end of the resistor plate,the starting resistance of

      the  resistor is 00.1Ω, it can  guarantee  thaccuracy without deducting the zero resistance when

      using.
   Ⅲ Resistance  element  is winding  with high quality wire, through strict process and sophisticated

      for a long time, has the characteristics of high accuracy, good stability.

㈡Applications:

    ZX25A rotary type resistance box is a lab type more value resistor which is made up of by six decimal
   switches in series, Resistance element connect on every contact of the switch, to get resistance value
   through changing  the switch  brush  position, widely used in factories, mines and enterprises, school
   and used as  measurement  of electricity  and other experiments  for  factory and R&D institution，and
   also be used for precise  adjusting  the  resistance value in the DC circuit. And the machine can check
   the DC bridge and resistance measurement meter of 1 grade.

㈢Power Rating:
   0.05W，0.1W
㈣Tolerance:
  B(±0.1%)，D(±0.5%)，F(±1.0%)，G (±2%)，J (±5%)