LACO offers calibration services for leak standards for all brands. Our calibration services are NIST traceable and our lab holds A2LA accreditation to both ISO 17025:2017 and ANSI/NCSL Z540-1-1994 standards. With a comprehensive range of primary and comparison calibration methods, along with our attentive technical support, you can have confidence in LACO for all your leak standard calibration requirements.

LACO Calibration History

  • A2LA accreditation since 1998
  • Performed over 75,000 leak standard calibrations
  • Calibration system overlap to ensure standard accuracy and repeatability


  • Helium leak standards down to 2e-10 atmcc/sec
  • Other gases down to 1e-9 atmcc/sec
  • Calibrate all leak standard brands
  • Typical turnaround time 3 weeks, expedited options available
  • Responsive technical staff
  • Multiple calibration points available
  • Repair services:
    • Leak standard repair and refill services
    • Replacement of leak element