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GE GM868-2-11-10045-S
Product Name: GE Sensing DigitalFlow GM868 Ultrasonic Gas Flowmeter
Product Overview: The GM868 is an ultrasonic gas flowmeter from GE Sensing’s DigitalFlow product family. It uses non-intrusive ultrasonic transducer technology to measure gas flow in pipes without wetted moving parts. The GM868-2-11-10045-S configuration represents a specific variant including a flanged flowcell, standard transducers, and optional I/O expansion. The system is suitable for clean and moderately contaminated gases in utility, industrial, and process applications.
Detailed content
Technical Specifications:
- Operating Temperature: -4°F to 131°F (-20°C to 55°C)
- Storage Temperature: -67°F to 167°F (-55°C to 75°C)
- Standard Analog Outputs: Two isolated 0/4–20 mA outputs (550 Ω max load)
- Optional I/O Expansion Slots: 6 additional slots for:
- Additional analog outputs (up to 3 boards, 4 isolated 0/4–20 mA outputs each)
- Analog inputs (4–20 mA inputs with 24 V loop power, or RTD inputs)
- Totalizer/frequency outputs (4 outputs per board, 10 kHz max)
- Alarm relays (3 Form C relays per board, general purpose or hermetically sealed)
- Transducer Temperature Range: Standard -58°F to 302°F (-50°C to 150°C); Optional overall range -310°F to 842°F (-190°C to 450°C)
- Pressure Ranges: Standard 0–2,700 psig (1–187 bar); Optional up to 3,480 psig (240 bar)
- Transducer Materials: Standard Titanium; Optional Monel or Hastelloy alloys
- Transducer Cable: One pair RG62 AU coaxial cables, up to 1,000 ft (330 m)
- Data Logging: Memory for over 43,000 flow data points (linear and/or circular logging)
- Process Connections: Flanged and compression fittings
- Mounting: Flanged flowcell or cold tap
Functional Features:
- Non-intrusive Bundle Waveguide Technology (BWT) ultrasonic measurement
- Graphic display showing flow in numerical or graphical format
- Comprehensive data logging and diagnostics
- Modular I/O expansion for alarms, totalizers, and analog signals
- Complies with EMC Directive 89/336/EEC, 73/23/EEC LVD, and PED 97/23/EC (CE marked)
Performance Parameters:
- Measurement accuracy consistent with GE DigitalFlow ultrasonic platform
- Suitable for a broad range of gases across wide pressure and temperature ranges
Material & Structural Characteristics:
- Flowcell: Available in titanium, Monel, or Hastelloy depending on process requirements
- Enclosure classifications: Standard general purpose; Optional Type 4X/IP66 weatherproof; Optional explosion-proof Class I, Division 2, ATEX
- RG62 AU coaxial transducer cabling for long-distance signal transmission
Installation Requirements:
- Install flowcell in accordance with process piping specifications (flanged or compression)
- Route transducer coaxial cables within specified maximum length (330 m)
- Select appropriate area classification enclosure for hazardous locations
- Configure I/O boards as required for the application
Usage Notes:
- Periodic verification of transducer alignment and signal strength recommended
- Ensure process media compatibility with transducer material selection
- Consult GE for specific applications requiring custom transducer configurations
