OCS offers comparison plans for standards and test weights.

OCS services include:

  • Periodic verification
  • Refurbishments for cast iron and
     working class masses
  • NIST Traceable
  • ISO 17025 Certificates
  • Ship-in, and pickup/drop off service
  • Fast turnaround


Our calibration technicians provide certification for:

  • Custom weights
  • Standard mass sets
  • Test blocks
  • Test weights

All calibrations are ISO/IEC 17025 accredited and NIST traceable.

Typical weights and standards we service include but are not limited to:

  • Denver Instruments
  • Rice Lake Weighing Systems
  • Troemner