The GE GF868-1-2-1-2-1-B-1-4-0-0-0-CC-RPT is an ultrasonic flow meter from the GE DigitalFlow™ series, specifically designed for flare gas/vent gas measurement. It employs patented Transit-Time™ technology and digital signal processing, making it suitable for demanding operating conditions in petrochemical, refining, natural gas, and offshore platforms, achieving accurate measurement across the entire flow range from low to high velocities.

Core Parameters and Configuration

Measurement Capabilities: Bidirectional flow velocity -100～100 m/s (standard), extended to 120 m/s; volumetric flow rate accuracy ±1% of reading, mass flow rate accuracy ±2% of reading, repeatability ±0.1%～0.3%.

Channels and Display: Single-channel/dual-channel selectable; dual independent backlit LCD graphic displays supporting real-time presentation of flow rate, operating conditions, and diagnostics.

Interfaces and Outputs: 2×RS-485 (Modbus RTU), 1×Ethernet (Modbus TCP); 4–20 mA analog output, dry contact alarm, supports loop power supply for temperature/pressure transmitters.

Power Supply and Power Consumption: 100–240 V AC (50/60 Hz) or 24 V DC (±15%); maximum power consumption 20 W.

Environment and Protection: Operating temperature -20～+55 ℃, resistant to vibration, electromagnetic interference, and corrosive environments.

Pipe Diameter Compatibility: Covers pipe diameters from 2–120 inches (50–3000 mm), supports clamp-on or insertion sensors.

Technical Advantages: No Moving Parts: No orifice plate, no mechanical wear, unaffected by liquid, impurities, and scale in flare gas, requiring no daily maintenance.

Resistant to Operating Condition Fluctuations: Stably handles unsteady flow, pulsating pressure, and component/temperature changes, achieving accurate measurement across the entire range.

Real-time molecular weight calculation: Patented algorithm instantly calculates the average molecular weight and outputs mass flow rate, improving the accuracy of material balance and leak detection.

High range ratio: Range ratio up to 2750:1, adaptable to a wide operating range of flare systems from "low flow standby to high flow discharge".

Redundant power supply: Supports AC/DC dual power supply modes; redundant power supplies can be configured for critical operating conditions to ensure continuous operation.

Typical applications: Flare gas total volume monitoring and leak identification, reducing material loss and emissions; Effluent gas recovery and energy optimization, accurately calculating recoverable gas volume; Interlocking and environmental emission monitoring of flare systems in oil refining and chemical plants; Gas measurement in remote/harsh environments such as offshore platforms and LNG terminals.

Model Number Decoding (Partial)

GF868: DigitalFlow Flare Gas Ultrasonic Flow Meter Series;

1-2-1-2-1: Channel/Configuration Combination (Single-channel is primary, dual-channel optional);

B: Display/Keyboard Configuration;

1-4-0-0-0-CC: Output and Communication (4–20 mA, RS-485/Ethernet, Dry Contact);

RPT: Redundant Power Supply/Enhanced Protection Options.

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