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Choose leak standards from the industry leader in Calibrated Leak Standards & Vacuum Gauge Calibration—LACO delivers confidence and peace of mind through fast, accurate, and accredited leak standards and vacuum gauge calibration for all manufacturers. 


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Quick turnaround lead times, responsive customer service, lifetime warranty, and optional expedited service.

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Accredited NIST traceable leak standards. Stable, clog resistant, robust, and low temperature coefficient.

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A2LA laboratory accreditation to ISO/IEC ISO 17025:2017 and ANSI Z540-1-1994 standards—the highest standard of technical proficiency.

  • New Leak Standards: A wide range of leak rates, connection fittings, gas and mix choices, multi-point calibration, and application engineering support, and micro tube capillary leak element design
  • Leak Standard Calibration: Complete multi-point comparison calibrations
  • Vacuum Gauge Calibration: Full calibration support, record retention, and reporting