• AABC Commissioning Group
  • ANSI Accredited
  • Government Industry Data Exchange Program
  • ILAC Mutual Recognition Arrangement
  • ISO 17025
  •  National Environmental Balancing Bureau
  • Sheet Metal and Air Conditioning Contractors' National Association

Welcome to Huston-DePue Calibration Laboratories (HDCL), an A2LA accredited metrology company. Since 1960 we have met the calibration needs of a multitude of companies and industries world wide. Whether delivering equipment to our facility, shipping instruments to us for calibration, or scheduling on-site service, you can always count on HDCL to deliver timely, quality service.


Please note HDCL's holiday schedule.
Our laboratory will be CLOSED the following days:

Thanksgiving Day - Thursday, November 26, 2020
Black Friday - Friday, November 27, 2020
Christmas Eve - Thursday, December 24, 2020
Christmas Day - Friday, December 25, 2020
New Year's Day - Friday, January 1, 2021



November 16, 2020

(click for details) UPDATE: HDCL's Response to COVID-19

HDCL is an Essential Business and will remain OPEN. Given the nature of Huston-DePue Calibration Laboratories’ (HDCL) services, many of our customers are identified as one of the 16 critical infrastructure sectors as outlined by the United States Department of Homeland Security in


March 24, 2020