Flow Computers
Product Overview
A Flow Computer is an advanced electronic device used in industrial processes to accurately calculate, monitor, and record flow rates and totalized flow of liquids, gases, and steam. It collects signals from field instruments such as flow meters, pressure transmitters, and temperature sensors, then applies industry-standard calculations (e.g., API, AGA standards) to determine corrected flow values under standard or base conditions.
Flow computers are widely used in oil & gas custody transfer, energy measurement, chemical processing, and power generation industries.
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How it works (simple explanation)
- Signal Input – The device receives signals from:
- Flow meters (pulse, 4–20 mA, frequency)
- Pressure transmitters
- Temperature sensors
- Compensation & Correction – It corrects raw flow readings by compensating for:
- Temperature changes
- Pressure variations
- Fluid properties (density, compressibility)
- Calculation – Using programmed equations (e.g., AGA3, AGA7, ISO 5167), it calculates:
- Instantaneous flow rate
- Standard volume flow
- Mass flow
- Totalized flow
- Output & Logging – Results are displayed locally and transmitted to SCADA/DCS systems via communication protocols.
What it measures
- Volumetric flow rate
- Mass flow rate
- Corrected (standard) flow
- Energy flow (BTU, kWh – if configured)
- Temperature
- Pressure
- Density (calculated)
- Totalized flow
Key advantages
- High accuracy for custody transfer applications
- Real-time compensation and correction
- Data logging and historical record storage
- Multi-stream measurement capability
- Supports multiple communication protocols
- Reduces manual calculation errors
- Complies with international standards (AGA, API, ISO)
Applications
- Oil & Gas pipelines
- Natural gas custody transfer stations
- Refinery process measurement
- Chemical plants
- Power generation plants
- Steam energy monitoring systems
- LNG and LPG measurement
Installation
Mounting Options:
- Panel mounting
- Wall mounting
- Rack mounting
- Field enclosure (explosion-proof available)
Installation Steps (General):
- Install in a vibration-free, dry environment.
- Connect input signals from flow meter, pressure, and temperature transmitters.
- Configure calculation standards and fluid parameters.
- Set communication protocol (Modbus, HART, Ethernet, etc.).
- Perform calibration and verification.
Technical Specifications
Parameter | Specification |
Input Signals | Pulse, Frequency, 4–20 mA, RTD, Analog |
Measurement Types | Volume, Mass, Energy |
Accuracy | Up to ±0.1% (depending on system) |
Display | LCD / Touchscreen |
Power Supply | 24 VDC / 110–240 VAC |
Communication | Modbus RTU/TCP, HART, Ethernet, RS-485 |
Data Logging | Internal memory with timestamp |
Operating Temperature | -20°C to +60°C (typical) |
Protection Class | IP65 / IP67 (field models) |
Standards Compliance | AGA, API, ISO 5167 |