Precision current sensing

for the Nuclear Sector with Galvanic Isolation

1. Customer Profile

  • Sector: Uranium enrichment systems
  • Customer type: Highly specialized technical company
  • Relationship with Sirio: Collaboration on a mission-critical project

2. The Challenge

The customer needed to measure a very small current across a relatively wide frequency range, ensuring:

  • Full galvanic isolation
  • Very low phase shift between input and output signals

The solutions tested previously failed to meet these requirements: the signal phase shift was too high, compromising measurement reliability.

3. The Sirio Solution

Sirio developed a fully customized component, designed to meet all performance requirements while using:

  • Standard materials to keep costs reasonable
  • Fully automated production, ensuring repeatability and consistent quality
  • Key technical features:
    – Use of capillary wire, a highly delicate material requiring ultra-precise handling and machinery
    – Vacuum resin encapsulation for long-term dielectric reliability
    – 100% partial discharge testing during production, in line with the customer’s specifications
    – Manufactured entirely at Sirio’s Padova facility, with lead times compatible with the customer’s just-in-time production

4. The Results

  • Product met all insulation and precision specs
  • Minimal phase shift, well within required thresholds
  • Reliable supply chain, supported by local, automated manufacturing
  • The customer successfully integrated the component into their systems, benefiting from a stable and technically skilled partner

5. Looking Ahead

This successful project strengthened Sirio’s position as a technology partner for high-criticality current sensing applications, where precision, isolation, and production continuity are non-negotiable. Further collaborations are already in progress.