Precision Reference Resistance, 6 Decade Box – 1 mΩ to 10 MΩ – AOIP ZX Series


The resistance boxes of the ZX series offer high precision and great stability over their 6 decades. They are designed for applications requiring precision and stability both in the development laboratory and in the field for the simulation of resistive sensors.

  • Values: 6 decades between x1 mΩ and x10 MΩ
  • Accuracy: from 0.01%
AOIP ZX Series offers six different models, capable of handling a maximum resistance of 111,111,100 Ω. These models feature resistive elements wound inductively with a special alloy resistance wire. Each element undergoes heat treatment and controlled aging processes to ensure greater stability and a low temperature coefficient.
We use top-quality switches with low-pressure contacts and minimal contact resistance for durability and reliability. Each decade switch is made and kept in a fully enclosed spot for maintenance-free use. These switches are housed in a strong metal case with a retractable handle for easy carrying.
The ZX74 model has the smallest decade, with a step of 1 mΩ. It’s suitable for simulating resistive probes and resistance bridges. On request, ZX resistance boxes can be supplied with a COFRAC calibration certificate issued by our SOFIMAE laboratory.


Dimensions L x W x H 440 x 130 x 120 mm
Mass 4 kg
Reference area 20 ° C ± 2 ° C (40 to 60% RH non-condensing)
Nominal operating range 5 to 35 ° C (RH: <75% non-condensing


AOIP ZX Resistance standard, 6-decade boxes – 1 mΩ to 10 MΩ-DpstarGroup