The new meter monitors inorganic chemicals such as hydrochloric, nitric and sulphuric acid. It uses a vibrating fork to measure density and concentration and is for continuous, real-time measurement and control in pipelines, bypass loops and tanks. The zirconium version has the same form, fit and function as the existing fork density meter, offering an integral mount transmitter with two mA outputs and Modbus/RS-485 communications. It also has ATEX and CSA/C-US approvals.
The density meter has been installed at Momentive Performance Materials and is delivering good results in a process that produces hydrochloric acid, which is then reused in a chemical operation within the plant, the company says.
‘This process requires a device that can handle the critical control of HCl concentration while being easy to clean to avoid clogging,’ said Roger Knox, Momentive’s instrument technician. ‘The Micro Motion fork delivered as we’d hoped – good density measurement for process control and easy accessibility to all wetted parts.’
The 7826 can be used in process control where density or concentration is the primary control parameter for the end product, or as an indicator of some other quality control parameter such as % solids.
Emerson says the direct insertion meter requires little maintenance, is insensitive to vibration, temperature and pressure variations, and provides high accuracy density and concentration measurement (± 0.001g/cm³ density, ±0.1% concentration).
The Micro Motion 7826 range is currently available in B3 and C22 nickel alloys, Monel 400, titanium, zirconium and stainless steel. www.emerson.com