Overview ONLINE MEASUREMENT DEVICES Densitometers Accurate density measurement is crucial part of fiscal measurement for custody transfer measurement system. We have experience of the design and deployment of numerous bypass loop density measurement systems for custody transfer and fiscal applications. We have alliances with key manufacturers to ensure transmitters are correctly installed and calibrated to optimise performance. Viscometers Accurate viscosity measurement can be provided as part of an bypass loop sampling system. We have developed alliances with key manufacturers to ensure that transmitters are correctly installed and calibrated to optimize performance in any application.