Emerson Micro Motion 3098 gas-specific gravity meter

The Micro Motion 3098 gas-specific gravity meter directly measures gas molecular weight and can be configured to output hydrogen purity, specific gravity, relative density, calorific value/BTU or Wobbe Index. Building upon Ni-span-C cylinder technology, this precision measurement technology provides the benefits of low cost of ownership, reduced maintenance costs and an integral transmitter. It is designed to help solve the problems that users confront on a daily basis, such as managing rapidly changing fired heater air-to-fuel ratios, reducing refinery hydrogen impurities and minimising windage losses in hydrogen-cooled generator sets.

The specific gravity meter incorporates a head-mounted transmitter that has the flexibility to digitally connect to distributed control systems as well as the ability to output raw sensor signals to flow computers - conforming to custody transfer best practices. The transmitter module has the capability of being able to output sensor data in four formats simultaneously: sensor frequency (time period), 4-20 mA, HART and RS485 Modbus. The gas-specific gravity meter incorporates a ‘known density verification’ diagnostic capability, which checks the meter for measurement alarm conditions, sensor integrity and the presence of coating, erosion or corrosion. This technology expands the availability of diagnostics information in critical density measurement applications and can result in significant reductions in maintenance costs and cycle times.