体外诊断 (IVD) 实验室自动化系统需要 100% 有效的液体处理功能。在这些系统中，证实液体体积通常是了解系统运行是否正常并且保证测试结果质量的关键。
Machine vision systems are able to reliably perform liquid level measurement because they have no moving parts or sensors that can wear out or fail. Machine vision is able to find the meniscus in a vial or the edge of liquid in a capillary tube even when measuring very small amounts. Outside a vessel, the measurement of the size of droplets or a liquid spot can aid in correlating the results of a test procedure. Machine vision systems can even measure the different levels of the separated phases of centrifuged blood and the thickness of the buffy coat.