Liquid Flow Calibration.

UKAS liquid flow calibration means your liquid flow meter is calibrated by a laboratory independently assessed and accredited by the United Kingdom Accreditation Service to ISO/IEC 17025:2017. The calibration establishes the meter’s flow error and measurement uncertainty at defined points across the required flow range, using a reference standard traceable to national measurement standards.

Labcal’s UKAS-accredited liquid flow calibration covers 0.5 mL/min to 500 L/min. This covers laboratory micro-flow instruments through to process flow meters in larger-bore pipework. Calibration is performed using water as the reference liquid. If your flow meter operates outside this range, or if your application requires calibration with a liquid other than water, contact us and we will advise on suitability.

Labcal’s standard liquid flow calibration is performed using water. Water calibration is appropriate for instruments used with other low-viscosity liquids of similar density, but a conversion factor may need to be applied for liquids with significantly different properties. For instruments used with highly viscous liquids or liquids with substantially different density from water, contact us to discuss whether additional steps are needed to meet your measurement accuracy requirements.

Calibration intervals for liquid flow meters should be determined based on the criticality of the measurement, required accuracy, operating conditions and historical instrument stability. Annual calibration is commonly adopted in regulated industries such as pharmaceutical and food production, although shorter or longer intervals may be appropriate depending on the application and performance history.

Volumetric flow calibration measures the volume of liquid passing a point per unit time (e.g. litres per minute). Mass flow calibration measures the mass of liquid (e.g. kilograms per minute), which is independent of density variations caused by temperature or concentration changes. For applications where mass accuracy is critical, Coriolis mass flow meters with mass flow calibration are typically preferred. Labcal calibrates both volumetric and mass flow instruments within its UKAS scope.