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The CLH Group has a Metrology Laboratory that is responsible for calibrating and verifying the measurement equipment used by the company, thus guaranteeing the reliability of quality control in all fuel logistics processes, from receipt and storage until final delivery to customers at facilities.

The laboratory, located in Loeches (Madrid), is one of the most comprehensive in Europe and is the only one certified by the Spanish Accreditation Body (or ENAC) for fuel volume with a flow range of up to 1 200 m3/hour.

The Metrology Laboratory carries out major duties, such as ensuring what is known as the “traceability chain”, in other words, that both the product quantity entering the company’s system and the one supplied to the end customer are measured with equipment that have been checked at origin against the national reference standard of the Spanish Metrology Centre (CEM).

The laboratory performs calibration tasks at its headquarters and the rest of the company’s facilities, where it also verifies the measurement systems in the storage tanks, road tanker loading area and aircraft fuel loading systems. It also offers its services to external customers.

One of the competitive advantages offered by the Metrology Laboratory is that it uses the actual product, that is, commercial fuel, for its tests, and this is highly valued by the customers.


The Metrology Laboratory of the CLH Group has been appointed Collaborating Laboratory of the Spanish Metrology Centre (CEM), which enables its facilities to perform joint calibrations, verifications or tests of oil product measurement equipment.

Furthermore, the company sponsors the CLH Chair in Hydrocarbon Metrology at the Polytechnic University of Madrid, with the purpose of promoting knowledge of hydrocarbon metrology, in addition to fostering metrology research activities, providing solutions to real problems in the operation of storage facilities and oil product transportation.

Certification and accreditation

The CLH Group’s environmental, quality, safety and RDI management systems are grouped together in a single Integrated Management system which is certified by the Spanish Association for Standardisation and Certification (AENOR).

Moreover, the technical expertise of the Metrology Laboratory has been confirmed since 2000 by the accreditations awarded by the Spanish National Accreditation Body (ENAC), according to the UNE-EN ISO/IEC 17025 quality standard.

LC10.066 Temperature and volume calibrations performed at permanent laboratory.

LE392 Onsite tests in meters and verification of measurement equipment.

Work for external customers

The Metrology Unit of CLH carries out system certification and equipment calibration activities for external companies. If you need a calibration in the laboratory or an onsite test as an external customer, you can contact through the following e-mail address: laboratoriometrologia@clh.es








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