The Sigma3 Flow Computer is a rack-mounted, multistream flow computer for fiscal measurement, custody transfer and batch loading of petroleum liquids and gases. It supports industry-standard gas and liquid measurement calculations and integrates with a wide range of flow meters. A modular rack accommodates up to six flow computers, and the I/O module is compatible with existing FPM207CE hardware to avoid cabinet modifications. It runs on a Linux operating system, and the Sigma3 software can also run as a virtual flow computer on any PC when hardware I/O is not required.
Key specifications
Application: Fiscal measurement, custody transfer and batch loading; liquid and gas, multistream
Rack: Up to six flow computers per rack; I/O compatible with FPM207CE hardware
Platform: Linux 5.10; 800 MHz ARM Cortex-A9, 512 MB DRAM, 8 GB flash
Connectivity: Ethernet, RS422/485, RS232/485, HART
Digital inputs: Sixteen opto-isolated, 24 VDC
Analog I/O: Four 4-20 mA channels with HART, over 16-bit resolution
Frequency inputs: Four opto-isolated, 0-50 kHz, accuracy < 0.003%
Pulse inputs: Four dual-pulse trains to ISO 6551 Level A, 0-50 kHz
How to specify / order
Number of meter streams and fluid type (liquid or gas)
Meter types and signal types (pulse, frequency, analog, HART)
Calculation standards required
Rack quantity and whether replacing FPM207CE hardware
Communication to SCADA/supervisory system
Virtual (PC) or hardware deployment
Pricing and lead time are quoted per configuration. Send the model, application details, product, flow range, and pressure/temperature to Flow Measurement Services for a quote. Specifications summarized from Guidant Measurement literature (Sigma3 Flow Computer Brochure); confirm current data with the factory before ordering.
Smith Meter (formerly FMC Technologies / TechnipFMC Measurement Solutions), now manufactured by Guidant. Flow Measurement Services supplies and services Smith Meter equipment.