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CALIBRATION The flow warehouse offers calibration certificates on all the equipment for sale. The flow meters can all be supplied with either a UKAS ( UNITED KINGDOM ACCREDITATION SERVICE) certificate which complies fully with requirements of UKAS or certificates which comply with ISO 17025 only. Both certifications contain full results, uncertainty of measurement and full description of the item being calibrated. The UKAS certificate is widely accepted by the EU and throughout the word. These air and water flow meters are calibrated either from first principle using volume, mass and time or by direct series comparison with a master flow meter. The anemometers are all calibrated on wind tunnels of varying sizes dependent upon the velocity range and the size of the anemometer. We offer both UKAS and ISO 17025 certificates. We utilise the services of the anemometer manufacturing company which is accredited to UKAS for the calibration of the anemometers and the services of a UKAS calibration company for the calibration of the flow meters