Compact density meter copes with aggressive medias

21 January 2014

Emerson Process Management has introduced the Micro Motion compact density meter, a multi-variable unit designed for the custody transfer metering of crude oil, refined hydrocarbons, alcohols and many aggressive process liquids.

The density meter can help minimise product give-away and reduce gain/loss errors.

The unit combines multivariable digital technology, a high speed signal processing technology, with an optimised meter design, to ensure good performance under varying process and external environments. This is achieved through the use of innovative compensation techniques where the meter measures both the fluid temperature and its own meter case temperature. This information is then used to minimise any measurement errors due to changes in environmental conditions.  

Multivariable digital technology further enhances the design of the meter by incorporating a fluid flow rate indication feature which is said to give users confidence in their density measurement and diagnose installation problems such as product build up or tube blockages prior to significant errors occurring.

The meter’s transmitter module can output sensor data in four formats simultaneously including sensor frequency (time period), 4-20mA, HART and RS485 Modbus. This allows users to view meter health and performance indicators while using a frequency signal output when it is connected to a flow computer. Previously unavailable in on-line density meter devices, this new technology provides diagnostic information in critical density measurement applications which can result in significant reductions in maintenance costs and cycle times.

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