Emerson 7955 Flow Computer

7955 flow computer specification

• Pulse integrity to IP 252/76, API Ch 5.5 Level A
• 5 Serial ports & 1 Ethernet port
• High resolution 20 bit A/D converter for analog inputs
• 4 meter run (stream) and proving capability
• Hot duty standby for multi-stream applications
available as standard

Overview

The Emerson 7955 Flow Computer is a proven, panel-mount fiscal flow computer engineered for custody transfer, fiscal metering, proving, and pipeline measurement across upstream, midstream, and downstream operations. It combines high-accuracy calculations with resilient pulse handling, secure logging, and modern communications, delivering defensible totals and smooth integration with SCADA/DCS/PLC systems. For teams standardizing measurement across multiple assets, the 7955 offers a reliable, multi-stream platform that’s field-friendly and audit-ready.

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Key Features

• Multi-stream capability: supervise up to 4 meter runs, suitable for single- and multi-meter skids, allocation lines, and terminal duties

• High-fidelity measurement: 20-bit A/D resolution on analog inputs for stable, repeatable results during proving and batch transitions

• Pulse integrity: designed for turbine/PD/other pulsed meters with industry-recognized pulse handling so fiscal totals remain defensible

• Industrial communications: Ethernet plus multiple serial ports (RS-232/422/485); Modbus-friendly and SCADA/DCS/PLC ready

• Secure operations & logging: granular user roles, alarms/events, and periodic hourly/daily/monthly reports streamline reconciliation and audits

• Proving & reporting: supports meter proving workflows and structured reports that accelerate third-party verification

• Integration without friction: straightforward handoff to historians, data lakes, and enterprise reporting via standard protocols

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Applications

• Custody-transfer metering skids and LACT units

• Pipeline measurement, allocation, and balancing

• Gas/liquid fiscal metering in terminals and tank farms

• Meter proving (bidirectional or compact provers) with repeatable results

• Batch loading and batch reporting

• Wet-gas / condensate scenarios demanding resilient algorithms and clean audit trails

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Technical Snapshot

• Meter runs: up to 4 runs (multi-stream) for flexible deployment across lines and products

• I/O & comms: Ethernet + multiple serial ports (RS-232/422/485) for brownfield/greenfield connectivity

• Measurement chain: 20-bit A/D for analog inputs; robust pulse acquisition aligned with industry practice for turbine/PD/other pulsed elements

• Data integrity: alarm/event logs with scheduled reports (hourly/daily/monthly) for regulatory and contractual compliance

• SCADA/DCS/PLC integration: Modbus-friendly design simplifies commissioning and lifecycle maintenance

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Why Choose Emerson 7955?

• Fiscal accuracy, proven in the field—built to keep uncertainty budgets tight and audits smooth

• Scalable & maintainable—multi-stream capability and practical comms reduce project risk and integration time

• Lower lifecycle cost—faster commissioning, consistent reports, and fewer site visits

• Enterprise-ready—clean handoff to historians and corporate reporting

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Helpful Resource 

New to flow computers or training stakeholders? Read our primer: What is a Flow Computer? → https://omansevenstar.com/what-is-a-flow-computer/

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FAQ 

Q1: How many meter runs does the 7955 support? Up to 4 runs (multi-stream), suitable for mixed lines and allocation.

Q2: What communications are available? Ethernet plus multiple serial ports (RS-232/422/485); straightforward Modbus integration to SCADA/DCS/PLC.

Q3: Is it suitable for proving and audits? Yes—high-fidelity measurement (20-bit A/D), robust pulse handling, and structured hourly/daily/monthly reports support proving and third-party audits.

Q4: Which meter types are supported? Compatible with turbine, PD, ultrasonic, Coriolis, and differential pressure/orifice installations.

Q5: How do I get the datasheet and configuration guidance? Click Request a Quote—we’ll send the official datasheet and propose a tailored configuration (meter types, runs, reports, and networking).

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Call to Action

Ready to secure more accurate, auditable totals? Request a Quote now to receive the official Emerson 7955 datasheet, recommended configuration (meter runs, reports, protocols), and lead time tailored to your application.