Variant of North American Industry Classification System (NAICS) 2022 Version 1.0 for Energy sector

• Non E - Industries not included in the energy sector
• 54 - Professional, scientific and technical services
• 541 - Professional, scientific and technical services
• 5413 - Architectural, engineering and related services

54138 - Testing laboratories

This industry comprises establishments primarily engaged in providing physical, chemical and other analytical testing services. The testing activities may occur in a laboratory or on-site.