Gas density measurement

Features

• Continuous, online density monitoring

• Measurement at true process conditions

• Insertion, sample by-pass and pocket options

• Compact design • Hazardous area approvals

• Converter electronics to suit application

Applications

• Fiscal/custody transfer gas metering

• Fuel gas analysis

• Burner control

• Ethane cracking and ethylene production

• Energy management systems

• Stack emissions analysis and control

• LNG metering and control

• Calorific value estimation

• Specific gravity measurement

• Process/quality control

• Product identification

• Blending/peak shaving

Real-time control

Process optimization and product quality control are achieved through the close control of process parameters and final product quality. The composition of any gas is often characterized by its density or specific gravity. Thermo Scientific gas density meters provide continuous, inline monitoring of the density, or density related variables, to instantly detect any variation of process constituents or final product quality. The results are improved productivity, minimized product waste and reduced costs by providing real-time control as opposed to sampling methods.

Compatible outputs Output

variables, such as specific gravity, calorific value or molecular weight, can be provided either by a third party flowmeter or by a Thermo Scientific™ Density Converter. The Thermo Scientific™ Sarasota HME900 field-mounted density converter option provides a direct HART® compatible output, whereas the Thermo Scientific CM515 panel-mounted electronics unit provides the most accurate conversion to maintain optimal process conditions.

General features of the range

The reliability and high accuracy required for fiscal applications are achieved using the Thermo Scientific proven technology of a vibrating cylinder (spool) design, with several additional design features, to ensure the high integrity of the measurement. An integral, high grade PT100 resistance temperature device mounted within the instrument gives a live temperature reading at process conditions to ensure precise compensation of the density coefficients and the ability to compensate the process fluid to reference or other conditions.

The effects of any dirt in the process fluid are minimized by the probe sampling method and the use of instrument filters, according to the model. Pressure effects are eliminated on all models because the sensor remains completely surrounded by the process fluid. Different sensor material options and BS EN ISO 15156/ NACE MR0175 conformance treatment are available to meet the extreme demands of corrosive, cryogenic, high temperature or high pressure applications. Offering hazardous area approvals, Thermo Scientific gas density meters are suitable for use in even the most hostile of environments.