Yokogawa's RotaMass LR dual bent tube Coriolis mass flow meter measures both liquids and gasses

Yokogawa's RotaMass LR dual bent tube Coriolis mass flow meter is designed to be self-draining and to measure both liquids and gasses. The mass flow measurement spans from 0-40 kg/h. The accuracy is ±0.15% for liquids and ±0.5% for gasses.

The Rotamass LR employs a dual bent tube design that optimally decouples the core measuring element from process vibration that can cause fluctuating zero stability and decrease measurement accuracy. When fluid density changes, a single tube Coriolis flow meter can become imbalanced and start to behave like an emitter. The Rotamass LR remains balanced due to the equal mass change in both tubes and the absence of interference from the process piping. By design, it is insensitive to fluctuations in the ambient temperature and achieves excellent zero stability under changing process conditions. The two tubes are made from C-22 alloy, which is less susceptible to thermal expansion than conventional stainless steel. 

The measurement of tube temperature plays a key role in mass flow and density measurements. Normally, it is more difficult to measure temperature with Coriolis flow meters that have tubes with a smaller surface area. The Rotamass LR solves this problem by using an inline temperature sensor, ensuring exact and fast measurements in process temperatures ranging from -50°C to +150°C, a unique feature in the low flow Coriolis flow meter market. 

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