Yokogawa Introduces RotaMASS LR Coriolis Flow Meter

November 8, 2012 - Yokogawa Electric announces RotaMASS LR, its smallest dual bent tube Coriolis mass flow meter. The RotaMASS LR employs a dual bent tube design for gas and liquid flow measurement. 

 

Designed to be self-draining and to measure both liquids and gases, the mass flow measurement spans from 0-40 kg/h. The accuracy is ± 0.15% for liquids and ± 0.5% for gasses. The dual bent tube design to overcome the current shortcomings of single tube low flow meters. These shortcomings include susceptibility to external vibrations and changes in ambient or process fluid temperatures which lead to less accurate and stable measurements in real-world conditions. 

 

 

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. 

 

The ROTAMASS LR has a gas-tight, all-stainless-steel secondary containment that can handle pressures up to 65 bar. The ROTAMASS LR can be used in high pressure applications up to 400 bar. A huge variety of welded process connections are available. Gaskets are not used, minimizing the risk of leaks. 

 

Insulation and heating jacket options 

For the prevention of fluid component separation and gas condensation, insulation and a heat jacket are available as an option. 

 

Liquid and gas low flow measurement, high pressure gas pipelines, chemical injection, micro dosing systems, metering pump control, blending, precision coating, vacuum thin film coating, etc.