METAS
The Federal Office of Metrology (METAS), part of the Department of Justice and Police (EJPD) realises and disseminates internationally harmonised and recognised units of measurement with the necessary accuracy. It supervises the deployment of measuring instruments in the fields of commerce, traffic, public safety, health and environment. One of its technical fields is Flow.
METAS has been working in the domain of micro flow for two years. Dr Hugo Bissig (Scientist) of METAS: “We have developed a system to determine liquid flow down to a few μl/min with an accuracy of a few percent. Therefore, it was evident for METAS to participate in this project.”
Calibration services at ultra-low flow rates need to be harmonized and improved to lower the measurement uncertainty. According to Mr Bissig this is not only important for hospitals, but in the first place for manufacturers of drug delivery devices to improve the products: “Products like applications and flow sensors can be improved if we can offer calibration services and the knowledge in this field at ultra-low flow rates in order to increase the accuracy of their measurements.”
METAS will contribute to the development of the primary standard. Mr Bissig: “the primary standard will cover flow rate ranges from 1 ml/min down to 100 nl/min with the aim of 10 nl/min and with the possibility of investigating the influence of pulsating flow.”
