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ISS launches next-generation family of Coriolis meters

ISS MassSense LFM 5000 liquid flowmeter
ISS MassSense LFM 5000 liquid flowmeter

ISS, an industry expert in microelectromechanical systems (MEMS) fluidic technology, is launching the next-generation MassSense liquid and gas density meters (LDM & GDM 6500) and liquid flowmeter (LFM 5000).

The meters are the first in a suite of products that ISS is scheduled to launch in 2017, including high-performance gas flowmeters (GFM 6500).

MassSense liquid flowmeter (LFM 5000) is the first product of a family of low-flow Coriolis meters based on ISS' technological innovations to make them viable for different new applications. 

The LFM 5000 overcomes shortcomings for current low-flow Coriolis meters, including high zero flow instability, high pressure drop, low density resolution, and drift over time.

The meter’s measurement range is 0-5,000gr/hr and it is immune to external vibrations with fast response for manufacturing automation.

The next product to be released is the MassSense gas flowmeter GFM 6500 with high performance and stability for gaseous applications.

The GFM 6500 will offer 100:1 turndown ratio at 0.5% reading accuracy with high zero flow stability and fully-compensated drift over time.

Three different sensors will cover 0-100 standard cubic cm (sccm), 0-500sccm, and 0-1000sccm direct flow.

"The optimised MEMS sensors in the GFM 6500 will allow direct Coriolis gas flow measurement with unprecedented stability and resolution, covering multiple ranges," said Nader Najafi, CEO at ISS.

ISS is also working on corrosion-resistant Coriolis meters for demanding applications.

MassSense liquid and gas density meters (LDM & GDM 6500) are the world's most sensitive in-line density meters at 6.5 digits of resolution, according to ISS.

They are so sensitive, they are capable of measuring hydrogen concentration in nitrogen at low pressures.

The meters offer the features of an analytical device at a fraction of the cost with real-time response, and they are also immune to external vibrations and are rugged enough for placement on fuel trucks.

Rick Smith, director of fluidic product development at ISS, commented: "Our MEMS chip-based sensor has significant performance and reliability advantages over the steel tube flow and density sensors."

The heart of the MassSense meters is a patented silicon sensing tube that vibrates at a very high frequency, above 20kHz, which eliminates the impact of environmental vibrations on density measurement.

Silicon sensing tube technology is lighter and stronger than traditional metal sensing technology.

ISS MassSense LFM 5000 liquid flowmeter