Tuesday, April 4, 2017

Gas Density Meter Provides Continuous Inline Density Monitoring

gas density meter product configurations
Gas Density Meters
Courtesy Thermo Scientific
Gas density measurement is crucial when looking at the molecular makeup of a sample, when quantifying variables which make up a whole. Custody transfer operations and other fiscally related operations can also require gas density measurement to properly determine delivered gas quantities. The Thermo Fisher Sarasota gas density instruments are specifically designed to deliver high accuracy continuous inline measurement of density and density related variables. Employed in large scale processing, gas density measurement is often found in the gas, chemical, and petrochemical industries, along with power generation operations.

Thermo Scientific’s Sarasota line of gas density instruments provide a measurement that can, with the use of auxiliary flow computers or other electronics from the company or third party vendors, provide additional data for specific gravity, calorific value, or molecular weight. Three basic meter styles provide for direct insertion, bypass, or pocket mounting arrangements. Two versions of each type are offered, with the first providing a frequency output and 4-wire PT 100 temperature sensor output for use by a flow converter or other computational device. The second version has an onboard HART compliant density converter with 4-20 mA output.

As the measured gas flows through the meter, it interferes with the base frequency of the vibrating sensor tube in proportion to the density of the gas. The instrument measures the change in vibration frequency, which is used to calculate the density. The onboard precision RTD provides for temperature compensation. Other features include:
  • Readings unaffected by pressure
  • Available for use in hazardous environments
  • Third party certifications
  • Connection options
  • Wide temperature range operation
  • Interfaces with Thermo Fisher flow computers, or other brands
  • Continuous online density monitoring
There are numerous industrial applications for the density meters, including energy management, flue gas analysis, custody transfer, burner control, stack emissions analysis, process and quality control, and more. A specialized retractor enables removal of the direct insertion gas density meter from the piping system under operating conditions up to 2500 psi.

Variants of the instrument accommodate a wide range of application and installation requirements. More detail is provided in the datasheet included below. Share your gas density and other process measurement requirements and challenges with product application experts. The combination of your process knowledge and their product application expertise will produce effective solutions.