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 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 17025:2017 and ANSI Z540-1-1994 standards.

  • 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

We are expanding!

As LACO continues to grow to meet customer needs, we will be moving our leak standard manufacturing and calibration operations to a new, expanded location in our facility. From December 20th to January 14th, we will be unable to perform leak standard calibrations or offer new calibrated leaks. Please plan either sending your orders well before or after these shutdown dates. Note that vacuum gauge calibration orders will not be affected by this relocation.

We appreciate your business and understanding during this move. We are excited that these changes will allow us to better serve our customers for many years to come.